Agilent Technologies VCR 8922 User Manual
Assembly Level Repair  
HP/Agilent Technologies  
8922 Series GSM Test Set  
Agilent Part No. 08922-90213  
Printed in UK  
January 1998  
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Introduction  
Introduction  
The HP/Agilent 8922 product family uses an assembly level repair service strategy. The  
HP/Agilent 8922 may be sent to an Agilent Technologies Sales and Service office or may  
be repaired on site. This book is used for both Agilent Technologies service and owner  
service.  
The HP/Agilent 8922 product family currently contains the HP/Agilent 8922A, HP/  
Agilent 8922B, HP/Agilent 8922E, HP/Agilent 8922F, HP/Agilent 8922G, HP/  
Agilent 8922H, HP/Agilent 8922M and HP/Agilent 8922S. There are differences in both  
the hardware and in the operation. In examples and task sequences this book presents  
general usage, and graphical instrument representations may not exactly match the HP/  
Agilent 8922 that you are servicing.  
Repairing the HP/Agilent 8922  
To repair the HP/Agilent 8922, follow the chapters in this book starting at the beginning  
and following the “where to go next” guidelines.  
Book Organization  
This book contains problem identification sections, assembly replacement sections,  
reference information and concept information. The chapters are sectioned in three parts;  
Service Procedures, Reference Information and Theory. This sectioning helps to identify  
the type of information found in a group of chapters.  
i
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Introduction  
ii  
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Contents  
Introduction  
i
1 Localizing the Problem  
Introduction 1-2  
Localizing the Problem - Flow Chart (Power-Up) 1-3  
Power-Up Checks 1-4  
If Power-Up Checks FAILED 1-5  
If Power-Up Happened Correctly 1-10  
2 Running Diagnostics  
Introduction 2-2  
Running Memory Card or ROM Based Diagnostics 2-3  
Loading and Running the Ram Test 2-7  
3 Verifying Performance  
Introduction 3-2  
Installing and Operating the Software 3-2  
Using the Compatibility Switch for the HP/Agilent 8922F/  
H or M/S 3-3  
4 Using the HP/Agilent 83210A Service Kit  
Introduction 4-2  
Configuring the RF Extender 4-3  
Extending Modules 4-5  
Making Measurements 4-6  
5 Troubleshooting the Controller/Display  
Introduction 5-2  
Parallel Bus 5-3  
Serial Bus 5-4  
Display 5-5  
Keyboard 5-6  
Contents-1  
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Contents  
6 Troubleshooting the Power Supply  
Introduction 6-2  
Power Cord Verification 6-3  
Line Voltage Selection / Line Fuse Replacement 6-5  
Transformer / Power Switch 6-6  
A28 Power Supply 6-7  
Where To Go Next 6-8  
7 Adjustments and Calibration  
Introduction 7-2  
Timebase Adjustments 7-3  
Periodic Calibrations 7-5  
Sum Loop Adjustment Procedure 7-6  
8 Assembly and Disassembly Procedures  
Introduction 8-2  
Top and Bottom Cover Removal 8-3  
Inside Protective Covers 8-4  
AF, Digital and RF Assemblies Removal 8-5  
A1 Front Panel Removal 8-7  
A10 Power Supply Regulator Removal 8-9  
A11 Receiver Mixer Removal 8-10  
A12 Pulse Attenuator Removal 8-12  
A21 GPIB Interface Removal 8-14  
A22 Display Removal 8-16  
A23 Input Section Removal 8-18  
A24 Attenuator Removal 8-19  
A28 Power Supply Removal 8-20  
Fan Removal 8-22  
Transformer Removal 8-24  
Contents-2  
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Contents  
9 Replacing a Part  
Introduction 9-2  
Replaceable Parts 9-3  
Firmware Upgrades 9-29  
10 Service Screen  
Introduction 10-2  
11 Self-Test Error Messages  
Introduction 11-2  
12 Module I/O Specifications  
Introduction 12-2  
A2 Audio Analyzer 2 12-3  
A3 Audio Analyzer 1 12-5  
A4 Modulation Distribution 12-8  
A5 Premodulation Filter and NSM 12-10  
A6 Signaling Source/Analyzer 12-13  
A9 Global Test and Demod 12-15  
A11 Receiver Mixer 12-19  
A13 Output 12-22  
A14 Pulse Driver 12-24  
A15 Reference 12-26  
A16 Receiver 12-32  
A18 Spectrum Analyzer 12-36  
A19 Measurement 12-38  
A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only 12-43  
A23 Input (Agilent 8922M/S Only) 12-47  
A25 Sum Loop 12-50  
A17, A26 Step Loop 12-53  
A27 DAC/Upconverter 12-56  
Contents-3  
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Contents  
A28 Power Supply 12-58  
A33 Hop Controller 12-59  
13 Instrument Block Diagrams  
Introduction 13-2  
14 Block Diagram Theory of Operation  
Introduction 14-2  
Technical Discussion 14-3  
Block Diagram 1 14-4  
Block Diagram 2 14-9  
Block Diagram 3  
HP/Agilent 8922B Only 14-15  
Block Diagram 4 14-17  
Block Diagram 5 14-18  
15 Diagnostics Theory  
Introduction 15-2  
AF_DIAGS 15-3  
RF_DIAGS 15-5  
MS_DIAGS 15-11  
GSM and DCS Diagnostic Tests 15-12  
Interpreting Results 15-13  
Contents-4  
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Contents  
16 Measurement Theory  
Introduction 16-2  
17 GSM Theory  
Introduction 17-2  
The GSM System 17-3  
E-GSM, DCS1800 and PCS1900 Systems 17-4  
Index 1  
Contents-5  
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Contents  
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Contents-6  
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1
Localizing the Problem  
1-1  
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Localizing the Problem  
Introduction  
Introduction  
This chapter helps to determine if a problem actually exists and which section of the  
instrument has a problem.  
This chapter comprises of four sections.  
❒ Localizing the Problem Flow Chart (Power-Up)  
❒ Power-Up Checks  
❒ If Power-Up Failed  
•
Power-Up Self Test Diagnostics  
❒ If Power-Up Happened Correctly  
•
•
Checking the RF Analyzer using the RF Generator  
Checking the RF Analyzer using the AF Generator  
1-2  
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Localizing the Problem  
Localizing the Problem - Flow Chart (Power-Up)  
Localizing the Problem - Flow Chart (Power-Up)  
See "Power Up Checks", in this Chapter, for details of the steps given in the flow chart  
below.  
Power On  
NO  
Fan On?  
Goto;  
"Troubleshooting the  
Power Supply"  
YES  
Beep after  
NO  
NO  
6 seconds?  
YES  
Goto;  
"Power-Up Self Test  
Diagnostics"  
Messages  
OK?  
YES  
NO  
Keys &  
Controls OK?  
YES  
Goto;  
"If Power-Up  
Happened Correctly"  
Failure  
Reported by  
Diagnostics ?  
NO  
YES  
Goto the relevant trouble shooting section;  
•
•
•
"Trouble Shooting The Controller/Display" - Chapter 5.  
"Trouble Shooting The Power Supply" - Chapter 6.  
"Running Diagnostics" - Chapter 2  
Figure 1-1  
Localizing the Problem - Flow Chart  
1-3  
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Localizing the Problem  
Power-Up Checks  
Power-Up Checks  
The following checks show whether the instrument is powering up correctly.  
(a) Depress the power button on the front panel (see diagram).  
(b) Check that the fan on the rear panel is working.  
(c) Listen for a single “beep” after pressing the power switch. This can be from 6 to 20  
seconds, depending on model type.  
(d) Check the display on the front panel for any error messages. (The normal message  
which will appear is “All host processor self-tests passed.” and/or "Frequency  
Reference Cal lost. Perform Reference Calibration".)  
(b)  
(Rear Panel Vent)  
(d)  
(c)  
"Beep"  
(a)  
Figure 1-2  
NOTE  
Power-Up Checks - Agilent 8922x  
If an error message appears after power up it may not be the only message  
which has appeared. Only the last message will be shown on this message line.  
SHIFT  
TESTS  
Press  
,
(MSG) to access the message screen for a list of all the  
error messages.  
1-4  
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Localizing the Problem  
If Power-Up Checks FAILED  
If Power-Up Checks FAILED  
If the power up checks failed, continue with this section.  
❒ If the fan did not start, see "Troubleshooting the Power Supply", Chapter 6.  
❒ If the fan started, but any of the other power-up checks failed, see "Power-Up Self Test  
Diagnostics".  
❒ If an error message occurs, refer to the Agilent 8922x Users Guide for additional  
information.  
Error Message Numbers  
If the error message refers to a self test error it will be of the form:  
One or more self tests failed: Error Code XXXX  
Where xxxx corresponds to the error message number shown in the table below.  
Table 1-1  
Error Message Numbers  
Error  
Number  
Failure  
Suspect Assembly  
Fatal Error - Host Processor Failure  
Fatal Error - ROM Checksum Failure  
Fatal Error - RAM Failure  
Fatal Error - RAM Failure  
Fatal Error - Timer Failure  
Real Time Clock Failure  
0002  
0004  
0008  
0010  
0020  
0040  
0080  
0100  
0200  
0400  
0800  
A7 Controller  
A8 Memory  
A8 Memory  
A8 Memory  
A7 Controller  
A8 Memory  
Keyboard Failure  
A1 Keyboard  
A21 GPIB  
Serial I/O Failure  
Internal Serial Bus Communication Failure  
CRT Failure  
Serial Bus  
A19 CRT Drive  
Miscellaneous H/W  
Miscellaneous Hardware Failure  
1-5  
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Localizing the Problem  
If Power-Up Checks FAILED  
Power-Up Self Test Diagnostics  
If the power-up sequence failed, the power-up self-tests can be re-run with the covers off.  
The LED’s on the controller board give the results of the power-up self-test.  
(a) Remove the instrument covers. Refer to the section "Top and Bottom  
Covers", Chapter 8, for details.  
(b) Power up the instrument.  
(c) Read the LED sequence given on the controller board. These LED’s can be  
read with the shields in place (refer to the diagram below)  
Location of LED’s  
3
2
1
0
Front Panel  
(View from top)  
Figure 1-3  
NOTE  
Self Test LED Location  
For multiple failures, the patterns for each failure will appear in sequence.  
1-6  
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Localizing the Problem  
If Power-Up Checks FAILED  
The following conventions are used to represent the LED’s throughout this chapter.  
Table 1-2  
LED Conventions  
LED shown in tables  
Represnts  
A ’lit’ LED  
An ‘off’ LED  
A flashing LED  
LED Sequences  
The LED error sequence will show two states, pass or fail, which are outlined below. The  
suspect assembly is given in the following tables, before moving on consult the section  
"Self-Test Diagnostic Result".  
No Failures  
Detected  
The LED’s will light for approximately 10 seconds, then all will turn  
off.  
3
2
1
0
Lit for 10 seconds.  
Failure Detected 1 The LED’s will initially all light.  
2 The next pattern blinks rapidly, and shows that an assembly has  
failed.  
3 The third sequence flashes twice and gives further information on  
the area of the board that has failed.  
4 The LED’s will light then go out.  
1-7  
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Localizing the Problem  
If Power-Up Checks FAILED  
Table 1-3  
Sequence of LED Patterns  
3
2
1
0
1
2
3
2
1
0
Assembly failure.  
Serial Bus  
Communication  
Failures  
3
3
2
2
1
1
0
0
3
3
2
2
1
1
0
0
3
4
No more errors.  
NOTE  
1. The third patterns are only documented for a serial bus communication failure. This is  
represented by the two outside LED’s flashing.  
2. The second and third patterns will be the same. It will appear as if the same pattern has  
flashed twice.  
For more than one error in the Agilent 8922x the LED’s will flash in the same sequence for  
each assembly that is faulty.  
1-8  
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Localizing the Problem  
If Power-Up Checks FAILED  
Where to Go Next  
❒ If the LED’s did not light at all, go to Chapter 6, "Troubleshooting the Power Supply".  
❒ If an error messgae occurs, use it in Chapter 2, "Running Diagnostics" to choose which  
diagnostic test to run. See also Chapter 11 "Self Test Error Messages".  
❒ If this section is used due to display problems, go to Chapter 5 "Troubleshooting the  
Controller/Display" before the error messages are repaired.  
GPIB/  
1-9  
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Localizing the Problem  
If Power-Up Happened Correctly  
If Power-Up Happened Correctly  
If power-up happened correctly and no problem is indicated, this section is used to func-  
tionally check most of the hardware. The generators are checked first with external mea-  
surements, then the analyzers are checked with the generator. The RF Generator is  
checked at 935 MHz and 10 dBm. The AF Generator is checked at 1 kHz and 1 V. These  
checks are for indication only, performance tests in Chapter 3, “Verifying Performance”,  
will test specifications.  
NOTE  
If you possess an Agilent 8922S or Agilent 8922M, you should first re-configure your  
instrument as an HP/Agilent 8922E or HP/8922G. To do this, select the following keys:  
• CONFIG(this is accessible from the Cell Control screen in the bottom right-hand  
corner).  
• Compatible, select (HP 8922E or HP 8922G)  
PRESET  
•
Referring to Figure 1-4, ensure the connections are made.  
AUDIO RF OUT  
AUDIO OUT  
AF To Oscilloscope  
RF To Spectrum Analayzer  
Figure 1-4  
NOTE  
Front Panel Connections  
RF GEN/RF ANL  
Press  
.
RF GEN/RF ANL  
SHIFT  
On the HP/Agilent 8922A/B, press  
.
CELL CNTL  
On the HP/Agilent 8922E/F/G/H/M/S, press  
,
(RFG/RFA).  
1-10  
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Localizing the Problem  
If Power-Up Happened Correctly  
Highlight the RF Output field (1).  
Select AUX RF OUT from the list of choices.  
Set the RF Generator Amplitudefield to 10 dBm(2).  
Set the AF Generator Amplitudefield to 1 V(3).  
2
1
3
Figure 1-5  
RF Analyzer Settings  
Where to Go Next  
•
If the generators are within specifications, go to the next section, “Checking the RF  
Analyzer Using the RF Generator”.  
•
If one or both of the generators appear to be faulty, go to Chapter 2, “Running  
Diagnostics” and run the appropriate tests.  
1-11  
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Localizing the Problem  
If Power-Up Happened Correctly  
Checking the RF Analyzer Using the RF Generator  
This section tests the RF Analyzer using the RF Generator as a signal source. This task  
assumes the same setting used in the previous section.  
•
Connect the RF In/Out to the Aux RF Out.  
Figure 1-6  
NOTE  
Front Panel Connections for the RF Analyzer  
RF GEN RF ANL  
Press  
.
RF GEN RF ANL  
SHIFT  
On the HP/Agilent 8922A/B, press  
.
CELL CNTL  
On the HP/Agilent 8922E/F/G/H/M/S, press  
,
(RF GEN RF ANL).  
1-12  
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Localizing the Problem  
If Power-Up Happened Correctly  
•
•
•
•
Set the RF Analyzer Frequencyfield to 935 MHz(1).  
Set the RF Analyzer Amplitudefield to 10 dBm(2).  
Set the Mod Source GMSKfield to Off(3).  
Select Morein the bottom right-hand corner of the screen (4).  
1
2
3
4
Figure 1-7  
RF Generator/Analyzer Settings  
1-13  
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Localizing the Problem  
If Power-Up Happened Correctly  
•
Select CW/AF ANLfrom the list of choices, and read the CW Freq(5) and CW Power  
(6) fields.  
5
6
Figure 1-8  
CW Readings  
Where to Go Next  
•
If the analyzer measurement was within the specification, go to the next section,  
“Checking the AF Analyzer using the AF Generator”.  
•
If the measurement was faulty, go to Chapter 2, “Running Diagnostics”, and run the test  
related to the RF Analyzer.  
1-14  
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Localizing the Problem  
If Power-Up Happened Correctly  
Checking the AF Analzyer Using the AF Generator  
This section tests the AF Analyzer with the AF Generator as a source. The AF Generator  
settings are the same as the first task, and displays the CW MEAS/AF ANL screen.  
•
Connect the AUDIO OUT to the AUDIO IN.  
Figure 1-9  
Front Panel Connections for the Audio Check  
•
•
•
Select Moreand from the list, select CW MEAS/AF ANL.  
Highlight AF Anl Inand select AUDIO IN(1).  
Read the AC Level(2) and the AF Freq(3) reading.  
2
3
1
Figure 1-10  
Audio Measurements  
1-15  
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Localizing the Problem  
If Power-Up Happened Correctly  
Where to go next  
•
If the analyzer measurement was within specification, go to Chapter 2, “Running  
Diagnostics” and run all the tests.  
•
If the analyzer measurement was faulty, go to Chapter 2, “Running Diagnostics” and  
run the tests relating to the AF Analyzer.  
1-16  
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2
Running Diagnostics  
2-1  
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Running Diagnostics  
Introduction  
Introduction  
There are two types of diagnostics for the HP/Agilent 8922: diagnostic tests and the HP/  
Agilent 8922B specific “RAM Test”. The latter is appropriate for the HP/Agilent 8922B  
only. The diagnostic tests are contained either on the memory card, part number 08922-  
10003 or in ROM memory for instruments with firmware revision code A.03.00 and  
above. The HP/Agilent 8922B specific “RAM Test” is contained on the “08922-10001,  
8922B Driver” disk supplied with the HP/Agilent 8922B.  
Most of the diagnostic tests relate to a fault in a specific instrument section. Therefore, if  
chapter 1 identified a specific section of the instrument, only those tests need to be run.  
The diagnostic tests whose names begin with E or G are specifically for the HP/Agilent  
8922E/G. The other tests are for any HP/Agilent 8922.  
This chapter comprises two sections. The first section, “Running Memory Card or RAM  
Based Diagnostics”, shows how to load and run the memory card based or ROM based  
diagnostics. The second section, “Loading and Running the RAM Test”, shows how to  
load and run the HP/Agilent 8922B RAM test. Equipment requirements and installation  
procedures are given in the HP/Agilent 8922B User’s Guide, Part Number 08922-90020.  
This chapter uses the diagnostic test names from an early memory card revision. ROM  
based diagnostic test names may differ from the names used in this chapter.  
2-2  
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Running Diagnostics  
Running Memory Card or ROM Based Diagnostics  
Running Memory Card or ROM Based Diagnostics  
Do these steps in the order shown  
PRESET  
1 - Press  
TESTS  
3 Press  
2 - Insert Memory Card (Optional)  
2-3  
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Running Diagnostics  
Running Memory Card or ROM Based Diagnostics  
For Memory Cards:  
4
Move cursor here and  
press knob.  
6
If CARD is displayed, go to step 6, if not move the cur-  
sor to this field, press knob and continue at step 5.  
Move cursor here and  
press knob. Follow the  
instructions to start.  
8
Select CARD  
5
Select,  
7
AF_DIAGS,  
RF_DIAGS1,  
MS_DIAGS1,  
CAL_REV,  
LOOP_BACK  
To select another test;  
•
•
To select another tests from the same program use  
the RESUME user key.  
To select a test from another program press  
TESTS key and begin at step 6.  
2-4  
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Running Diagnostics  
Running Memory Card or ROM Based Diagnostics  
Reading Memory Card Diagnostic Test Results  
Probability Indicator  
Test Results  
Assemblies suspected to be defective  
Troubleshoot the assembly with the highest  
probability first and re-run test. Continue this  
process with all assemblies listed until the defect is  
found. See also Chapter 15 "Diagnostic Theory'.  
2-5  
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Running Diagnostics  
Running Memory Card or ROM Based Diagnostics  
Selecting Memory Card Diagnostic Test Execution Conditions  
WHILE RUNNING A TEST  
BEFORE RUNNING A TEST  
Specifies whether to run measurements continuously or  
stop after completion of each measurement. This choice  
can be modified when a diagnostic program is running.  
Specifies whether to stop  
testing or continue when a  
failure occurs. This choice  
can be modified when a  
diagnostic program is  
running.  
This feature is not used by  
the diagnostic program.  
Specifies whether to print diagnostic test results.  
These options are used for controlling various  
parts of the tests. These options can be changed  
depending on the test program. They are  
selected by using the cursor and knob.  
Where to Go Next:  
If any high-probability failures occurred, those assemblies can be replaced and the test re-  
run. When the tests pass, the performance tests can be run to verify performance (refer to  
Chapter 3). If low-probability failures occur, the performance tests can be run for further  
indication or measurements can be made to individual assemblies using Chapters 4, 12  
and 13.  
2-6  
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Running Diagnostics  
Loading and Running the Ram Test  
Loading and Running the Ram Test  
Your HP/Agilent 8922B comes with software to test the Data Buffer.  
Loading the RAM Test  
1
2
3
Locate the floppy disk labeled “08922-10001, 8922B Driver.”  
Insert the disk into the drive.  
Type MSI A:(substitute your drive specifier for A: if your drive is not drive A) and  
ENTER  
press  
.
ENTER  
4
Type LOAD “DRIVER22B”,1and press  
.
The Data Buffer Driver will now be loaded and will begin to run.  
K3, "Test RAM  
5
6
7
8
Press  
Use the cursor to select the output device.  
K0, "Accept  
Select the area of RAM to test and Press  
Repeat selection for each area of RAM.  
.
Where to go next  
If any of the RAM areas tested bad go to chapters 8 and 9.  
•
Selecting from a List  
⇓
⇓
•
Use  
and  
to scroll through the list. A beep will sound when you reach an end  
of the list.  
⇓
SHIFT  
SHIFT  
ENTER  
PG UP  
•
•
•
Use  
Use  
Use  
or  
or  
to move to the first item in the list.  
PG DOWN  
⇓
to move to the last item in the list.  
or  
to select the current item and move to the next field on the  
screen.  
•
Use  
to select the current item and move to the previous field on the screen.  
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Running Diagnostics  
Loading and Running the Ram Test  
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3
Verifying Performance  
3-1  
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Verifying Performance  
Introduction  
Introduction  
Because of the specialized nature of the HP/Agilent 8922 and the equipment required to  
support it, it is recommended that calibration and repair be performed only by specially  
equipped Agilent Technologies service centers.  
A list of specifications and verfication tests can be found in the HP/Agilent 8922x User’s  
Guide.  
Verification  
Performance Test Software provided with the product is used to verify the electrical  
performance of the HP/Agilent 8922 GSM Test Set. If the instrument passes this  
verification, its operation and specifications are assured within the measurement  
uncertainties provided in the performance test print out.  
Installing and Operating the Software  
Performace Test Software  
This is supplied on a 3.5-inch, double-sided floppy disk and is written to run with BASIC  
5.0 and later. Modifications to the program should be limited to changing the default  
addresses and storing copies for back-up purposes.  
Understanding the Tests  
Test Descriptions contains a description of each test that is performed by the Performance  
Test software. This description is intended to help locate problems if the software fails to  
execute properly or to help users understand the test methodology that is used in each  
performance test. The descriptions are not step by step procedures for manual  
performance tests.  
3-2  
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Verifying Performance  
Using the Compatibility Switch for the HP/Agilent 8922F/H or M/S  
To Load the Program in the Agilent 8922M/S.  
To verify the performance of the HP/Agilent 8922H/M you need to convert the instrument  
back from an HP/Agilent 8922G, or convert the HP/Agilent 8922F/S to an HP/Agilent  
8922E.  
You are now ready to run the Performance Test Software.  
1) Put the disk in the disk drive.  
2) Type ``LOAD "PT_8922"'', press ENTER.  
After you have completed the Performance Tests, return the instrument back to the  
HP/Agilent 8922F/S or HP/Agilent 8922H/M using the same process in reverse.  
Using the Compatibility Switch for the  
HP/Agilent 8922F/H or M/S  
Back Conversion  
To turn the instrument from the HP/Agilent 8922H/M or HP/Agilent 8922F/S back to an  
HP/Agilent 8922G or an HP/Agilent 8922E, select the following keys:  
❒ CONFIG (this is accessible from the Cell Control screen in the bottom right-hand  
corner).  
❒ Compatible, select HP 8922G or HP 8922E  
❒ HP-IB Adrs (22)  
❒ PRESET  
The instrument is now set up as an HP/Agilent 8922G or HP/Agilent 8922E and ready for  
Performance Verification testing.  
Forward Conversion  
To return the instrument from an HP/Agilent 8922G back to an HP/Agilent 8922H/M or  
an HP/Agilent 8922E to an HP/Agilent 8922F/S, select the following keys:  
❒ More (this is accessible from the Cell Control screen in the bottom right-hand corner).  
Scroll down the list and select CONFIG.  
❒ Compatible, select HP 8922H/M or HP 8922F/S  
❒ HP-IB Adrs (14)  
❒ PRESET  
The instrument is returned to an HP/Agilent 8922H/M or HP/Agilent 8922F/S.  
3-3  
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Verifying Performance  
Using the Compatibility Switch for the HP/Agilent 8922F/H or M/S  
To Configure the GPIB Addresses  
1) With the program loaded, type ``EDIT DEFAULT_ADDRESS'', press ENTER.  
2) Modify each line to indicate the proper instrument address (700-730).  
It is now possible to re-store the program as "PT_8922" or store it under a different name.  
To Run the Program  
1) Type ``RUN'', press ENTER.  
2) Follow the directions as they appear on the screen.  
Notes on Running the Program.  
The first screen which appears is the GPIB status of each piece of test equipment that is  
supported. It is only necessary to have the instruments responding that will be used in each  
particular test. Make certain that each instrument you will be using is responding at the  
proper address. Duplicate addresses may make an instrument appear to be responding but  
this is not allowed. Press "I" (for Ignore) to continue past this screen.  
The second screen prompts you for the instrument model. If you have disk 08922-10006,  
select HP 8922G (for HP/Agilent 8922H/M performance testing) or HP 8922E (for  
HP/Agilent 8922F/S performance testing). The third screen which will appear is the main  
Performance Tests selection menu. Three options are available on this screen:  
❒ Select the performance test to run, remember the test instruments and UUT must be  
responding over GPIB.  
❒ Turn the printer function ON or OFF. If the printer function is turned on it must be  
responding over GPIB or the program will lock up.  
❒ Exit from the program.  
Press the key corresponding to the option that you would like to perform.  
The other screens that appear are connection instructions, error messages and output  
results.  
3-4  
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4
Using the HP/Agilent 83210A Service Kit  
4-1  
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Using the HP/Agilent 83210A Service Kit  
Introduction  
Introduction  
This section is a supplement to the diagnostics program for troubleshooting the  
HP/Agilent 8922 to the assembly level. The extender boards should be used when the  
diagnostics cannot correctly isolate a defective assembly, or when it is necessary to verify  
the module level performance of the HP/Agilent 8922.  
The section provides the information necessary to extend and troubleshoot the input and  
output signals for most RF, audio, and digital assemblies.  
4-2  
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Using the HP/Agilent 83210A Service Kit  
Configuring the RF Extender  
Configuring the RF Extender  
To extend RF modules, it is necessary to use the RF extender board (08922-60129) with  
the correct coax jumper cables. These cables route the RF signals to and from the module  
and allow the signal path to be accessed for measurements. The following table and  
diagram shows the coax jumpers that are required for each RF module.  
Table 4-1  
Coax Jumpers for RF Extender Board  
On PLUG 1 Connect Pin Number On PLUG 3 Connect Pin Numbers  
Assembly  
3
7
9
13  
17  
3
9
13  
15  
17  
20  
Number  
ForA13  
For A14  
For A15  
ForA16  
For A17  
For A18  
For A25  
For A26  
ForA27  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
4-3  
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Using the HP/Agilent 83210A Service Kit  
Configuring the RF Extender  
The following example shows how to interpret table 4-2 and install the coax jumpers on  
the extender board. This example shows the configuration for the A13 assembly.  
Figure 4-1  
RF Extender Board  
4-4  
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Using the HP/Agilent 83210A Service Kit  
Extending Modules  
Extending Modules  
The modules shown in the following table can be extended using the appropriate extender  
boards from the HP/Agilent 83210A Service Kit. Assemblies that cannot be extended can  
usually be accessed directly while the assembly is installed in the instrument.  
Table 4-2  
Extender Board Part Numbers  
REF #  
A2  
DESCRIPTION  
Audio Analyzer 2  
EXTENDER  
08920-60142  
08920-60142  
08920-60141  
08922-60132  
08920-60140  
A3  
Audio Analyzer 1  
A4  
Modulation Distribution  
Premod Filter and NSM  
Signaling Source / Analyzer  
Controller  
A5  
A6  
A7  
08920-60133  
08920-90135  
A8  
Memory  
08922-60132  
08922-60133  
08922-60129  
08922-60129  
08922-60129  
08922-60129  
08922-60129  
08922-60129  
08920-60138  
08920-60135  
08922-60129  
08922-60129  
08922-60129  
08920-60133  
A9  
Global Test and Demod  
Output  
A13  
A14  
A15  
A16  
A17  
A18  
A19  
A20  
A25  
A26  
A27  
A33  
GSM Timing Gen  
Reference  
Receiver  
Step Loop B  
Spectrum Analyzer  
Measurement  
CRT Driver  
Sum Loop  
Step Loop A  
DAC / Upconverter  
Hop Controller  
4-5  
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Using the HP/Agilent 83210A Service Kit  
Making Measurements  
Making Measurements  
Audio / Digital Assemblies  
The extender boards for the audio and digital assemblies allow the boards to be extended  
above the instrument. This provides better access to signals going to and from these  
assemblies. Refer to the “Block Diagrams” (chapter 13) or “Module I/O Specs”  
(chapter 12) for pin numbers and typical I/O characteristics for each assembly. Use the  
extender board shown.  
RF ASSEMBLIES  
The extender boards for the RF assemblies extend the modules above the instrument. This  
allows better access to control signals and allows the RF input and output signal paths to  
be opened for making measurements. The following procedure outlines the steps  
necessary to make measurements on the RF modules with the RF extender board.  
1. Configure the RF extender card with the proper coax jumpers. Refer to table 4-2 and  
figure 4-1.  
2. Decide the signal path that needs to be measured. Find the correct plug number and pin  
number on the “Block Diagrams” (chapter 13) or “Module I/O Specs” (chapter 12).  
4-6  
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Using the HP/Agilent 83210A Service Kit  
Making Measurements  
3. Remove the correct coax jumper and connect a measurement instrument as shown in  
the following diagram. To measure signals going TO the module, measurements should  
be made on the lower row of connectors on the extender module. Outputs coming  
FROM the modules (going into the instrument) are measured on the top row of  
connectors on the extender board.  
4. Turn off the instrument’s power switch. Remove the module from the instrument.  
Install the module onto the extender board and install the extender board into the  
instrument.  
5. Power on the instrument and make the measurements.  
4-7  
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Using the HP/Agilent 83210A Service Kit  
Making Measurements  
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4-8  
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5
Troubleshooting the Controller/Display  
5-1  
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Troubleshooting the Controller/Display  
Introduction  
Introduction  
This chapter helps isolate problems in the control sections of the instrument, the sections  
are:  
•
•
•
•
•
•
A1 Keyboard  
A7 Controller  
A8 Memory  
A20 CRT Driver  
A21 HP-IB Interface  
A33 Hop Controller  
Problems in the Control sections can be broken into four types, these types are:  
•
•
•
•
Parallel Bus  
Serial Bus  
Display  
Keyboard  
This chapter addresses each category in a separate section. This chapter assumes that  
Chapter 13, Instrument Block Diagram will be used as a reference.  
5-2  
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Troubleshooting the Controller/Display  
Parallel Bus  
Parallel Bus  
The parallel bus is at the center of the control section. The parallel bus is defined as direct  
connections to the A7 Controller. These connections include the data bus, address bus and  
dedicated parallel control lines.  
The assemblies on the parallel bus are:  
•
•
•
•
•
•
•
•
•
•
A1 Keyboard  
A6 Signalling Source/Analyzer  
A7 Controller  
A8 Memory  
A9 Global Test/Demod  
A19 Measurement Board  
A20 CRT Driver  
A21 GPIB Interface  
A32 GSM Controller  
A33 Hop Controller  
Most problems with the parallel bus are accounted for in the power-up self-tests. The self-  
tests check the A7 Controller first, then the A8 Memory. If these two tests pass, the  
instrument will beep once after approximately 10 seconds. If these tests do not pass, the  
problem is probably on one of the two boards or something is pulling down the parallel  
bus.  
The assemblies that are not directly checked by the power-on self-tests are the A1  
Keyboard and the A21 GPIB Interface.  
5-3  
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Troubleshooting the Controller/Display  
Serial Bus  
Serial Bus  
The serial bus controls many of the assemblies through individual serial control lines. The  
serial control lines are generated at the A33 Hop Controller.  
The A33 Hop Controller takes parallel data from the A7 Controller and de-multiplexes the  
data for the assemblies on the serial bus. In the power-up self-tests, the A33 Hop  
Controller and the assemblies on the serial bus are tested. If a power-up self-test serial bus  
failure occurs and no A33 failures have occurred, the problem could be between the A33  
Hop Controller and the assembly identified in the failure.  
5-4  
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Troubleshooting the Controller/Display  
Display  
Display  
The display section contains the A22 CRT, and the A20 CRT Drive. The A20 CRT Drive  
receives parallel data from the A7 Controller and generates the drive signals for the A22  
CRT. The A20 CRT Drive is tested during the power-up self-tests for the ability to receive  
data and to respond back to the A7 Controller. If the A20 CRT Drive passes the power-up  
self-tests and the display does not respond the signals going to the A22 CRT can be  
checked at J6 on the A29 Motherboard.  
Line Name  
Pin Number  
Description  
INTHIGH  
J6(1)  
CRT intensity reference high. Up to 100 V with  
respect to INTLOW. Floating with respect to  
ground. From the A22 CRT to bias the intensity  
drive circuit at the A20 CRT Drive.  
INTW  
J6(2)  
CRT intensity control voltage. Up to 100 V with  
respect to INTLOW. Floating with respect to ground.  
From the A20 CRT Drive to the A22 CRT to vary the  
intensity of the display.  
INTLOW  
HSYNC  
J6(3)  
J6(4)  
CRT intensity reference low. Floats with respect to  
ground. From the A22 CRT to the low side of the  
intensity drive circuit at the A20 CRT Drive.  
Horizontal sync pulse for the A22 CRT. A TTL  
pulse at approximately 19 kHz. From the A20 CRT  
Drive to the A22 CRT. The HP/Agilent 8922F/H/M/S  
use a 15 kHz PAL signal.  
+12CRT  
VID  
J6(5)  
J6(6)  
Filtered +12AUX for the A22 CRT. There is a 20  
kHz low pass filter on the A29 Motherboard to filter  
the +12AUX for the A22 CRT.  
Video signal for the A22 CRT. A TTL signal to turn  
the signals off and on. The rate is approximately  
6.25 MHz. From the A20 CRT Drive to the A20  
CRT.  
VSYNC  
GND  
J6(7)  
J6(8)  
Vertical sync pulse for the A22 CRT. A TTL signal  
from the A20 CRT Drive to the A22 CRT at a rate of  
approximately 60 Hz.  
5-5  
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Troubleshooting the Controller/Display  
Keyboard  
Keyboard  
The A1 Keyboard assembly contains both the keys and the knob. The keyboard is  
configured in a matrix with the rows being scanned with pulses from the A7 Controller  
and the columns being read by the controller. The column lines are pulled up through  
resistors and are pulled low when a key is pressed. The A7 Controller determines which  
key is being pressed by reading which column line is pulled low and which row the  
column line is being pulled low through. Since the row outputs are tri-state, the low-going  
pulses are not seen on the output until a key is pressed and the current path is completed.  
The keyboard can be checked with an oscilloscope by disconnecting the ribbon cable from  
the keyboard and checking for the pull-up voltages on the column pins. Then with the  
keyboard connected, check that the lines are being pulled low at the A7 Controller  
connector J4. The pin numbers on A7-J4 are the same as those on A1-J1. The ribbon cable  
connector has a mark to indicate to pin 1. Pin 2 is directly opposite pin 1.  
Table 5-1  
HP/Agilent 8922E/F/G/H/M/S Keyboard (HP/Agilent 8922 A/B keys shown in  
parenthesis)  
Column 0 Column 1  
Column 2  
Pin 11  
Column 3  
Pin 12  
Column 4  
Pin 13  
Column 5  
Pin 14  
Pin 9  
Pin 10  
CELL  
ORGCALL RCVCALL ENDCALL L1(K4)  
L2(K5)  
CONFIG  
(RF GEN/  
RF ANL)  
(K1)  
(K2)  
(K3)  
CELL  
CNTL  
(HOP  
INCR÷10  
down arrow not used  
SHIFT  
CANCEL  
not used  
CNTRL)  
MEAS  
SYNC  
INCRSET  
PRESET  
not used  
not used  
PREV  
INCR×10  
up arrow  
not used  
not used  
leftarrow  
ON/OFF  
ppm W  
TESTS  
7
8
4
5
1
2
0
.
MEAS  
ARM  
RECALL  
LOCAL  
9
6
3
+/-  
% dBµV  
Hz µV  
ENTER  
GHZ dBm  
MHz V  
kHzmV  
5-6  
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Troubleshooting the Controller/Display  
Keyboard  
If the pull-up voltages are present at the end of the ribbon cable and the voltages are not  
pulled down when a key is pressed, the problem is most likely on the A1 Keyboard  
assembly. If the pull up voltages are present and are pulled down when a key is pressed but  
the controller does not respond, the problem is most likely at the A7 Controller assembly.  
The knob can be checked with an oscilloscope at the J4 connector on the A7 Controller.  
When the knob is turned, pulses should be present on A7-J4 pins 19 and 21. When the  
knob is pushed the level at A7-J4 pin 23 should change states. The A1 Keyboard end of  
the ribbon cable should also be checked for +5 V on pins 15 and 16. If the signals are  
getting to the A7 Controller the problem is most likely at the A7 Controller assembly.  
Where to Go Next  
If either the A1 Keyboard or A7 Controller assemblies measured in-correctly, go to  
chapters 8 and 9.  
5-7  
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Troubleshooting the Controller/Display  
Keyboard  
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5-8  
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6
Troubleshooting the Power Supply  
6-1  
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Troubleshooting the Power Supply  
Introduction  
Introduction  
This chapter helps verify that the power supply is at fault when no indication for power is  
present upon power-up. If the power supply appears defective, the problem can be  
localized to the line module, mains (line) fuse, transformer, power supply, regulator,  
motherboard, or power switch. This chapter is arranged to check each section of the power  
supply. The views of the instrument in this chapter are both top and bottom views with the  
covers removed. Refer to chapter 8 “Assembly/Disassembly” for help in removing the  
covers.  
NOTE  
The mains (line) fuses and power supply DC fuses in the HP/Agilent 8922 are all fast-blow  
fuses (not “slow-blow”).  
6-2  
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Troubleshooting the Power Supply  
Power Cord Verification  
Power Cord Verification  
Use this diagram to verify that the correct line cord is being used.  
Table 6-1  
Line Cords  
Cable  
Agilent  
Part  
Length,  
Plug Description inches  
(mm)  
C
D
Cable  
Color  
For Use In  
Country  
PlugType  
Number  
a
8120-1351  
8120-1703  
0
4
90/Straight BS1363A  
90  
90 (229)  
90 (229)  
Mint  
Gray  
Mint  
Gray  
United Kingdom,  
Cyprus, Nigeria,  
Rhodesia,  
Singapore  
8120-1369  
8120-0696  
0
4
Straight  
NZSS198/ASC112  
79 (201)  
87 (221)  
Gray  
Gray  
Australis,  
Argentina,  
a
Straight/90  
New Zealand,  
Mainland China  
8120-1689  
8120-1692  
7
2
Straight  
90  
79 (201)  
79 (201)  
Mint  
Gray  
Mint  
Gray  
East and West  
Europe, Central  
African Republic,  
Arabia, Egypt  
a
8120-1378  
8120-4753  
8120-1521  
8120-4754  
1
6
Straight NEMA5-15P  
Straight  
90  
80 (203)  
90 (230)  
80 (203)  
90 (230)  
Jade  
Gray  
Jade  
Gray  
United States,  
Canada, Mexico,  
Phillipines, Taiwan,  
Japan  
1
90  
Jade  
Gray  
8120-1348  
8120-1538  
2
3
Straight  
90  
80 (203)  
80 (203)  
Dark  
Gray  
Dark  
Gray  
8120-2104  
3
Straight SEV 1011  
1959-24507, Type 12  
Straight/90  
79 (201)  
Gray  
Switzerland  
8120-2296  
8120-3997  
4
4
79 (201)  
177 (402)  
Gray  
Gray  
Straight/90  
8120-0698  
6
Straight/NEMA6-15P  
90 (230)  
Black  
United States,  
Canada  
Continued Over  
6-3  
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Troubleshooting the Power Supply  
Power Cord Verification  
Table 6-1  
Line Cords  
Cable  
Length,  
Plug Description inches  
(mm)  
Agilent  
Part  
Number  
C
D
Cable  
Color  
For Use In  
Country  
PlugType  
8120-2956  
8120-2957  
8120-3997  
3
4
4
90/Straight  
90/90  
Straight/Straight  
79 (201)  
Gray  
Gray  
Gray  
Denmark  
a
8120-4211  
8120-4600  
7
8
Straight IEC83-B1  
Straight/90  
79 (201)  
79 (201)  
Black  
Gray  
South Africa, India  
8120-1860  
6
Straight CEE22-V1  
(Systems Cabinet Use)  
Straight/Straight  
Straight/90  
59 (150)  
Jade  
Gray  
8120-1575  
8120-2191  
8120-4379  
0
8
8
31 (79)  
59 (150)  
80 (203)  
Jade  
Gray  
Jade  
Gray  
Jade  
Gray  
90/90  
a.Part number shown for plug is industry identifier for plug only. Number shown for cable is Agilent Part Number  
for complete cable including plug. E = Earth Ground; L = Line; N = Neutral.  
6-4  
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Troubleshooting the Power Supply  
Line Voltage Selection / Line Fuse Replacement  
Line Voltage Selection / Line Fuse Replacement  
Use this diagram to verify that the line module is set to the correct line voltage, that the  
fuse is not blown, and that it is the correct value.  
6-5  
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Troubleshooting the Power Supply  
Transformer / Power Switch  
Transformer / Power Switch  
Use this diagram to verify that the correct voltages are present when the instrument’s  
power cord is connected. The table shows the expected values and pin numbers.  
6-6  
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Troubleshooting the Power Supply  
A28 Power Supply  
A28 Power Supply  
Use this diagram to verify that the regulated voltages are present and correct at the output  
of the power supply board, and at the mother board connection to the regulator. Use this  
diagram also to check the fuses on the fuse board. The tables show the voltages,  
connectors, pin numbers, and fuse values.  
6-7  
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Troubleshooting the Power Supply  
Where To Go Next  
Where To Go Next  
If any part of the power supply is defective refer to chapter 8 “Assembly/Disassembly”  
and chapter 9 “Replacing a Part” for removal and replacement. After the power supply is  
repaired, go to chapter 1 “Localizing the Problem” to verify that no other problems exist.  
6-8  
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7
Adjustments and Calibration  
7-1  
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Adjustments and Calibration  
Introduction  
Introduction  
This chapter contains information to perform the necessary calibrations and adjustments  
for periodic maintenance or following repairs. Each year the timebase and periodic  
calibration adjustments should be performed. Also, the overall performance of the  
instrument should be verified each year with the automated performance tests in chapter 3  
“Running Performance Tests”.  
The calibrations and adjustments covered in this chapter are divided into three sections:  
❒ Timebase Adjustments  
•
•
Standard Timebase  
Optional High Stability Timebase  
❒ Periodic Calibrations (ROM based)  
•
•
•
•
Voltmeter Reference  
Audio Frequency Generator Gain  
External Modulation Path Gain  
Audio Analyzer 1 Offset  
❒ Sum Loop Adjustment Procedure  
7-2  
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Adjustments and Calibration  
Timebase Adjustments  
Timebase Adjustments  
Standard Timebase Adjustment Procedure (Reference Calibration)  
NOTE  
This procedure should only be performed after the instrument has warmed up at least 30  
minutes. It should be performed after replacement of the reference section A15, or if the  
instrument gives an error message “Frequency reference cal lost. Perform reference  
calibration.”  
1. Connect a 10 MHz source to the rear panel REF IN connector.  
2. On the configuration screen, select the “Calibrate” field.  
3. Wait approximately 15 seconds; the reference will be calibrated.  
7-3  
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Adjustments and Calibration  
Timebase Adjustments  
Option 001 High Stability Timebase Adjustment Procedure  
1. Remove the instrument top cover. Power up the instrument and let it warm up for  
approximately 1 hour.  
2. Remove the rear-panel cable between the Opt. 001 REF OUT and REF IN connectors  
(if present).  
3. Attach a high accuracy frequency counter to the rear panel OPT 001 REF OUT. The  
frequency counter resolution and accuracy should be at least 1 Hz at 10 MHz.  
4. Adjust the high stability timebase (see figure 7-1) until the frequency counter reads 10  
MHz.  
NOTE  
After performing this calibration, it is necessary to install a cable from the OPT 001 REF  
OUT to the REF IN connector for the instrument to use the high stability timebase as the  
reference.  
Adjust to  
10 Mhz  
Figure 7-1  
High Stability Timebase Adjustment  
7-4  
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Adjustments and Calibration  
Periodic Calibrations  
Periodic Calibrations  
To Run the Periodic Self-Calibration Program  
TESTS  
1. Press  
to access the TESTSscreen.  
2. Select the field to the right of the colon under Procedure.  
3. Select ROMunder the Choices:menu.  
4. Select the field to the left of the colon under Procedure.  
5. Select PER_CALunder the Choices:menu.  
RUN TEST  
6. Select  
.
7. Follow the instructions on the screen.  
7-5  
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Adjustments and Calibration  
Sum Loop Adjustment Procedure  
Sum Loop Adjustment Procedure  
This procedure should be performed whenever Step Loop A Assembly (A26) or Sum  
Loop Assembly (A25) is replaced. It is not necessary to perform this adjustment for a  
periodic calibration.  
A spectrum analyzer is required to measure the instrument’s output during these  
procedures. It is recommended to use a synthesized spectrum analyzer if possible.  
Procedure:  
1. Turn off the HP/Agilent 8922.  
2. Remove the instrument top cover and the DAC/Upconverter Module (A27). (It is  
necessary to remove the RF Cover plate that holds the module in the instrument.)  
3. Power up the instrument, select the RF GENERATOR/RF ANALYZER screen, and set  
the RF Gen Amplitude to −20 dBm at the RF IN/OUT connector.  
4. Prepare the spectrum analyzer. Set the reference level to −10 dBm. Connect the HP/  
Agilent 8922 RF IN/OUT to the spectrum analyzer input.  
First Adjustment  
5. Again from the RF GENERATOR screen, set the HP/Agilent 8922 frequency to 800  
MHz.  
6. Set the spectrum analyzer center frequency to 786.6 MHz. (The output from the HP/  
Agilent 8922 is 13.4 MHz lower than was entered because the DAC/Upconverter is  
gone).  
7. Set the spectrum analyzer span to 10 MHz per division. ADJUST R32 “OFFSET” on  
top of Sum Loop (A25) until the signal on the spectrum analyzer is between 776.6 and  
796.6 MHz.  
8. Reduce the spectrum analyzer span to 1 MHz per division and adjust R32 again until  
the signal on the spectrum analyzer is centered within 2 divisions (2 MHz).  
NOTE  
Some modules (prefix 3050A and lower) only need to be centered within 10 MHz for all  
of these adjustments.  
7-6  
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Adjustments and Calibration  
Sum Loop Adjustment Procedure  
Second Adjustment  
9. Now set the HP/Agilent 8922 frequency to 502 MHz.  
10. Set the spectrum analyzer center frequency to 488.6 MHz with a span of 10 MHz per  
division.  
11. Adjust R180 “GAIN” on top of Sum Loop (A25) until the signal on the spectrum  
analyzer is centered within 10 MHz.  
12. Reduce the spectrum analyzer span to 1 MHz per division, and adjust R180 again until  
the signal on the spectrum analyzer is centered within 2 divisions (2 MHz).  
Final Adjustment  
13. Set the HP/Agilent 8922 frequency to 1000 MHz.  
14. Set the spectrum analyzer frequency to 986.6 MHz, then set the span to 10 MHz per  
division.  
15. Adjust R160 “KNEE GAIN” on top of Sum Loop (A25) until the signal on the spectrum  
analyzer is centered within 1 division (10 MHz).  
16. Reduce the spectrum analyzer span to 1 MHz per division, then adjust R160 again until  
the signal on the spectrum analyzer is centered within 2 divisions (2 MHz).  
Final Check  
17. Repeat the above procedures until all three adjustments pass without any further fine  
tuning.  
18. Turn the instrument power off and reinstall the DAC/Upconverter Module. The  
adjustment is now complete.  
7-7  
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Adjustments and Calibration  
Sum Loop Adjustment Procedure  
This Page Intentionally Left Blank  
7-8  
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8
Assembly and Disassembly Procedures  
8-1  
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Assembly and Disassembly Procedures  
Introduction  
Introduction  
Removing and replacing assemblies is straightforward. This chapter contains tool lists,  
hints and drawings to help you do it effectively. Detailed step-by-step procedures are not  
given for all assemblies.  
After replacing certain assemblies you will need to load new calibration data into the HP/  
Agilent 8922 or perform adjustments. The calibration data is supplied on a Memory Card  
that is included with the replacement assembly.  
Refer to chapter 9, “Replacing a Part”, for information about adjustments that are required  
after replacing certain assemblies.  
CAUTION  
Perform the following procedures only at a static safe work station. The printed circuit  
assemblies in this instrument are very sensitive to STATIC ELECTRICITY DAMAGE.  
Wear an anti-static wrist strap that is connected to earth ground.  
Recommended Torque  
1. Screws: Tighten until just snug.  
2. RF connectors (SMC SMA): 62 N-cm (5.5 lb-in.)  
3. Nuts holding semi-rigid coax: 51 N-cm (4.5 lb-in.)  
Further Information  
For further information, refer to chapter 9. This chapter contains more information about:  
•
•
•
Part numbers for replaceable parts.  
Ordering information.  
Adjustments required after assemblies are replaced.  
8-2  
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Assembly and Disassembly Procedures  
Top and Bottom Cover Removal  
Top and Bottom Cover Removal  
1. Remove four 2-pt. Pozidriv top bumper mounting screws.  
2. Remove four 2-pt. Pozidriv side mounting screws and bumpers.  
3. Remove four 2-pt. Pozidriv screws and standoffs.  
4. Remove fourteen TX-10 screws and top cover.  
5. Remove two TX-10 screws and bottom foot.  
6. Remove two TX-15 screws and bottom cover.  
Tools Required  
•
•
•
TX-15 screw driver  
TX-10 screw driver  
2-pt. Pozidriv screw driver  
SIDE VIEW  
1
3
2
4
(Both Sides)  
(Both Sides)  
To remove covers, pull sides  
slightly apart, slide them back a  
few inches and lift off.  
6
(Both Sides)  
8-3  
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Assembly and Disassembly Procedures  
Inside Protective Covers  
Inside Protective Covers  
All covers can be removed with a TX-15 screw driver. Screws shown circled only require  
loosening.  
492 Top Cover (B, E and G)  
505 Bottom Plate (B,E and G)  
252  
240 GPIB  
Mounting  
Bracket and  
241-242  
Screws  
493-  
498  
506-  
521  
244  
499-  
458  
(Opt. 001)  
501  
Washer  
502-  
504  
Nut  
114 Regular  
Mounting  
Bracket and  
115-118  
Screws  
(Not Shown)  
416-  
421,  
427-  
456  
424  
3
426  
12 CRT Bracket  
8-4  
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Assembly and Disassembly Procedures  
AF, Digital and RF Assemblies Removal  
AF, Digital and RF Assemblies Removal  
A27  
A28  
A25  
A13  
A15  
A20  
A19  
A11  
A16  
A18  
A17  
A14  
A32  
A2  
A3  
A4  
A5 A6 A9 A8  
A7  
A33 A34, (A,G) A31, (G)  
A36, (B)  
A37 (B)  
8-5  
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Assembly and Disassembly Procedures  
AF, Digital and RF Assemblies Removal  
This can only be done once the top cover and inside protective covers have been  
removed.  
RELEASE LEVERS  
PULL  
RING  
CAUTION  
Before pulling ring on the A8 Memory Board loosen the securing screw.  
Use a TX-10 Torx head screwdriver to loosen.  
8-6  
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Assembly and Disassembly Procedures  
A1 Front Panel Removal  
A1 Front Panel Removal  
Done with top, bottom, and inside protective covers removed.  
Removing Modules  
1. Remove RF cover.  
2. Remove RF modules.  
Disconnecting Cables  
3. Disconnect RF cable on mixer assembly. (1/4-inch SMA connector)  
4. Disconnect cable from connector J77 on motherboard.  
5. Disconnect top cable from pulse switch.  
6. Disconnect cable from connector J6 on motherboard.  
7. Disconnect cable from connector J5 on motherboard.  
8. Disconnect ribbon cable from front panel.  
Detaching Front Panel  
9. Remove TX-15 top CRT mounting screw.  
10. Remove 2 TX-15 side CRT mounting screws.  
11. Remove 8 TX-10 front panel mounting screws. (both sides)  
NOTE  
Steps 12 and 13 are necessary only when complete removal of the front panel is desired.  
Most repairs can be made without completing these steps.  
12. Remove 15 5/8-inch hex nuts.  
13. Pull front panel assembly away from chassis until speaker assembly is visible. Remove  
3 TX-10 mounting screws and disconnect the speaker cable from J7 on motherboard.  
Tools Required  
•
•
•
•
•
TX-15 screw driver  
TX-10 screw driver  
2-pt. Pozidriv  
5/8-inch wrench  
1/4-inch wrench  
8-7  
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Assembly and Disassembly Procedures  
A1 Front Panel Removal  
7-11  
(A1 Mounting Screws)  
47  
35  
A1  
6
(Trim)  
548  
27-30  
546  
(Trim)  
49-52,  
54-63,  
66  
37  
38-43,  
45, 46,  
65  
36  
547  
(Trim)  
34  
W31  
Power  
Switch  
J1  
33  
32  
1
70  
48  
2
(Frame)  
31  
(Panel  
Dress)  
(Nut under  
volume knob)  
8-8  
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Assembly and Disassembly Procedures  
A10 Power Supply Regulator Removal  
A10 Power Supply Regulator Removal  
Done with top cover removed.  
1. Remove Digital cover.  
2. Remove A33 Hop Controller to expose A10 screw.  
3. Loosen TX-15 screw.  
4. Disconnect attached cable and remove power regulator.  
Tools Required  
•
•
•
TX-15 screw driver  
TX-10 screw driver  
1/4-inch wrench  
TOP VIEW  
3
2
1
8-9  
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Assembly and Disassembly Procedures  
A11 Receiver Mixer Removal  
A11 Receiver Mixer Removal  
Done with top cover removed.  
1. Remove RF cover.  
2. Remove at least three RF modules.  
3. Remove three TX-10 screws.  
4. Disconnect all cables and remove the A11 Receiver Mixer assembly.  
Tools Required  
•
•
•
TX-15 screw driver  
TX-10 screw driver  
1/4-inch wrench  
8-10  
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Assembly and Disassembly Procedures  
A11 Receiver Mixer Removal  
1
2
TOP VIEW  
MIXER  
3
SIDE VIEW  
8-11  
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Assembly and Disassembly Procedures  
A12 Pulse Attenuator Removal  
A12 Pulse Attenuator Removal  
Done with top cover removed.  
1. Remove RF cover.  
2. Remove at least three RF modules.  
3. Remove two TX-10 screws.  
4. Disconnect all cables and remove A12.  
Tools Required  
•
•
•
TX-15 screw driver  
TX-10 screwdriver  
1/4-inch wrench  
8-12  
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Assembly and Disassembly Procedures  
A12 Pulse Attenuator Removal  
1
2
TOP VIEW  
PULSE  
SWITCH  
3
SIDE VIEW  
8-13  
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Assembly and Disassembly Procedures  
A21 GPIB Interface Removal  
A21 GPIB Interface Removal  
Done with top cover removed.  
1. Remove four TX-15 power supply cover screws.  
2. Remove two 7mm bolts.  
3. Remove one TX-10 screws.  
4. Disconnect ribbon cable.  
Tools Required  
•
•
•
TX-15 screw driver  
TX-10 screw driver  
7mm wrench  
8-14  
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Assembly and Disassembly Procedures  
A21 GPIB Interface Removal  
1
TOP VIEW  
2
3
4
8-15  
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Assembly and Disassembly Procedures  
A22 Display Removal  
A22 Display Removal  
Done with instrument top and bottom covers removed.  
1. Do steps 1 through 11 of the A1 Front Panel removal instructions.  
NOTE  
The front panel assembly must be separated from the main chassis. Considerable pulling  
force is required to pull the front panel from the chassis.  
2. Disconnect RF cable. (5/16-inch SMC connector.)  
3. Remove front bezel. (Slide a flat-blade screw driver under the left bottom corner of the  
bezel and pry it forward until it pops loose.)  
4. Remove four TX-15 front panel mounting screws.  
5. Remove two 5/18-inch hex nuts.  
6. Pull the CRT assembly and the front panel apart. (Be careful not to damage RF cabling.)  
7. Remove four TX-15 CRT bracket mounting screws.  
8. Loosen two TX-15 input mounting screws.  
9. Slide the monitor out of the CRT shield.  
Tools Required  
•
•
•
•
•
•
•
TX-15 screw driver  
TX-10 screw driver  
2-pt. Pozidriv  
5/8-inch wrench  
1/4-inch wrench  
5/16-inch wrench  
flat blade screw driver  
8-16  
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Assembly and Disassembly Procedures  
A22 Display Removal  
3
2
CRT  
4
(4 places)  
5
7
CRT SIDE VIEW  
6
8
8-17  
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Assembly and Disassembly Procedures  
A23 Input Section Removal  
A23 Input Section Removal  
Done with instrument top and bottom cover removed.  
1. Do steps 1 through 11 of the A1 Front Panel removal instructions.  
NOTE  
The front panel assembly must be separated from the main chassis. Considerable pulling  
force is required to pull the front panel from the chassis.  
2. Remove two 5/8-inch hex nuts.  
3. Remove two TX-15 side mounting screws.  
4. Remove one TX-15 bottom mounting screw.  
5. Disconnect all cabling and remove input section assembly.  
Tools Required  
•
•
•
•
•
TX-15 screw driver  
TX-10 screw driver  
2-pt. Pozidriv  
5/8-inch wrench  
1/4-inch wrench  
1/4" SMC CONNECTOR  
RIBBON  
CABLE  
A22 Display  
1/4" SMC  
CONNECTOR  
FRONT PANEL  
AND SIDE VIEW  
2 (2 places)  
4
BOTTOM VIEW  
3
8-18  
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Assembly and Disassembly Procedures  
A24 Attenuator Removal  
A24 Attenuator Removal  
Done with instrument top and bottom covers removed.  
1. Do steps 1 through 11 of the A1 Front Panel removal instructions.  
NOTE  
The front panel assembly must be separated from the main chassis. Considerable pulling  
force is required to pull the front panel from the chassis.  
2. Remove two TX-15 attenuator mounting screws.  
3. Disconnect two RF cables. (5/16-inch SMA connectors.)  
4. Push the top of the attenuator firmly away from the CRT until it becomes free.  
Tools Required  
•
•
•
•
•
•
TX-15 screw driver  
TX-10 screw driver  
2-pt. Pozidriv  
5/8-inch wrench  
1/4-inch wrench  
5/16-inch wrench  
2
(5/16" SMA)  
3
4
8-19  
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Assembly and Disassembly Procedures  
A28 Power Supply Removal  
A28 Power Supply Removal  
Done with instruments top and bottom covers removed.  
1. Remove power supply cover.  
2. Remove standard plate. If installed remove option 001.  
3. Remove five TX-10 screws that attach power supply board to the main chassis.  
4. Remove the eight 2-pt. Pozidriv rear panel mounting screws (four on each side).  
5. Remove the four TX-10 transformer mounting screws.  
6. Remove the eight TX-10 connector plate mounting screws.  
7. Disconnect cables from connectors J1 and J2.  
8. Carefully slide power supply away from instrument.  
Tools Required  
•
•
•
TX-15 screw driver  
TX-10 screw driver  
2-pt. Pozidriv  
2
1
3
BOTTOM VIEW  
TOP VIEW  
8-20  
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Assembly and Disassembly Procedures  
A28 Power Supply Removal  
8-21  
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Assembly and Disassembly Procedures  
Fan Removal  
Fan Removal  
Done with top cover removed.  
1. Remove four TX-15 power supply cover screws and remove cover.  
2. Remove four 2-pt. fan mounting Pozidriv screws.  
3. Disconnect cable and remove fan.  
Tools Required  
•
•
TX-15 screw driver  
2-pt. Pozidriv  
8-22  
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Assembly and Disassembly Procedures  
Fan Removal  
8-23  
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Assembly and Disassembly Procedures  
Transformer Removal  
Transformer Removal  
Done with top and bottom covers removed.  
1. Do steps 1 through 8 of the A28 Power Supply Removal instructions.  
2. Disconnect cables and remove transformer using illustration below.  
Tools Required  
•
•
•
•
TX-15 screw driver  
2-pt. Pozidriv  
Soldering equipment  
TX-10 screwdriver  
8-24  
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9
Replacing a Part  
9-1  
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Replacing a Part  
Introduction  
Introduction  
To order parts contact your local Agilent Technologies Sales and Service office.  
Assembly Replacements  
For most parts, you can either order a new assembly or an exchange assembly. Exchange  
assemblies are factory-repaired, inspected, and tested. If you order an exchange assembly  
you must return the defective assembly for credit.  
With some assemblies you will receive a Memory Card that contains factory-generated  
calibration data for the assembly. There will also be an instruction sheet for loading the  
calibration data into the instrument after you replace the defective assembly. With  
exchange assemblies, you must return the Memory Card with the defective assembly to  
receive full credit.  
Adjustments after Replacing Assemblies  
The following table shows which adjustments should be performed after replacing  
assemblies. The adjustments and calibrations are described in chapter 8, “Assembly/  
Disassembly”.  
Table 9-1  
Adjustments After Replacement  
Assembly  
Replaced  
Calibration or Adjustment  
Required  
A3  
Periodic Self Cal  
A4  
Periodic Self Cal  
A15  
A19  
A25  
A26  
Timebase Adjustment (standard)  
Periodic Self Cal  
Sum Loop Adjustment  
Step Loop Adjustment  
9-2  
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Replacing a Part  
Replaceable Parts  
Replaceable Parts  
The following tables and figures list part numbers for replaceable parts. For more  
information or details of replaceable parts, contact your local Agilent Technologies Sales  
and Service Office.  
9-3  
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Replacing a Part  
Replaceable Parts  
Table 9-2  
Replaceable Parts  
Item  
Agilent Part  
Number  
C
D
Qty. Description  
Mfr. Code Mfr.Part  
Number  
A1  
J1  
08920-60201  
1250-1811  
3
5
1
1
BD AY KEY  
28480  
00000  
08920-60201  
ADAPT FN F SMA (CONN, TP N)  
ORDER BY  
DESCRIPTION  
W31  
08922-61037  
08922-61085  
08922-00009  
08922-00079  
08922-00053  
08922-21002  
08922-40002  
08922-40003  
0515-2126  
8
6
1
1
1
1
1
1
1
1
5
SWITCH/SPKR HARNESS ASSY (G/H/M Only) 28480  
08922-61037  
08922-61085  
08922-00009  
08922-90079  
08922-00053  
08922-21001  
08922-40002  
08922-40003  
W31  
SWITCH/SPKR HARNESS ASSY (E/F/S Only)  
PANEL DRESS (A/B Only)  
PANEL DRESS (E/F/S Only)  
PANEL DRESS (G/H/M Only)  
MACH FRAME (FRONT DIE)  
KEY PAD (A/B Only)  
28480  
28480  
28480  
28480  
28480  
28480  
28480  
28480  
1
1
1
0
2
3
4
8
2
6
6
KEY PAD (E/F/G/H/M/S Only)  
SMM3.0 6SEMPNTX  
7-11  
ORDER BY  
DESCRIPTION  
27-30  
31  
0515-0380  
2950-0196  
2950-0054  
2
2
1
4
1
2
SMM4.0 10SEMPNTX  
NUT HEX 1/4-36  
00000  
00000  
00000  
ORDER BY  
DESCRIPTION  
ORDER BY  
DESCRIPTION  
32,33  
NUT HEX 1/2-28 THD  
ORDER BY  
DESCRIPTION  
34  
35  
36  
08922-00056  
08922-40001  
0370-2110  
3
2
2
1
1
1
CLIP WINDOW  
BEZEL - CRT  
28480  
28480  
00000  
08922-00056  
08922-40001  
KNOB BASE .250 JG  
ORDER BY  
DESCRIPTION  
37  
08920-21023  
0515-1940  
4
2
1
9
CRT WINDOW  
00000  
00000  
ORDER BY  
DESCRIPTION  
38-43,  
SMM2.5 6PCHPNTX  
ORDER BY  
45,46,65  
DESCRIPTION  
47  
47  
47  
47  
47  
47  
47  
47  
48  
08922-00041  
08922-00042  
08922-00080  
08922-00082  
08922-00038  
08922-00083  
08922-00086  
08922-00085  
0370-1001  
6
7
1
1
1
5
1
6
6
6
1
NAME PLATE (A Only)  
NAME PLATE (B Only)  
NAME PLATE (E Only)  
NAME PLATE (F Only)  
NAME PLATE (G Only)  
NAME PLATE (H Only)  
NAME PLATE (M Only)  
NAME PLATE (S Only)  
KNOB RND .125 GY  
28480  
28480  
28480  
28480  
28480  
28480  
28480  
28480  
00000  
08922-00041  
08922-00042  
08922-00080  
08922-00082  
08922-00038  
08922-00083  
08922-00086  
08922-00085  
1
1
1
1
1
8
ORDER BY  
DESCRIPTION  
49-52,  
54-63,  
66  
2950-0035  
5041-0944  
8
15 NUT-HEX 15/32-32 THD.  
00000  
ORDER BY  
DESCRIPTION  
70  
4
2
9
1
2
1
KEY CAP “POWER”  
TRIM SIDE, 177H  
TRIM, TOP FM  
00000  
00000  
00000  
ORDER BY  
DESCRIPTION  
546-547 5001-0540  
ORDER BY  
DESCRIPTION  
548  
5041-8802  
ORDER BY  
DESCRIPTION  
9-4  
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Replacing a Part  
Replaceable Parts  
7-11  
(A1 Mounting Screws)  
47  
35  
A1  
6
(Trim)  
548  
27-30  
546  
(Trim)  
49-52,  
54-63,  
66  
37  
38-43,  
45, 46,  
65  
36  
547  
(Trim)  
34  
W31  
Power  
Switch  
J1  
33  
32  
1
70  
48  
2
31  
(Panel  
Dress)  
(Nut under  
volume knob)  
(Frame)  
9-5  
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Replacing a Part  
Replaceable Parts  
Table 9-3  
Replaceable Parts  
Item  
Agilent Part C D Qty. Description  
Mfr.  
Mfr.Part  
Number  
Code Number  
A2  
A3  
A4  
08920-60212  
08920-60171  
08920-60209  
7
6
1
1
1
1
AUDIO ANALYZER 2 (Order 08920-61812)  
AUDIO ANALYZER 1  
MODULATION DISTRIBUTION (Order 08920-61809)  
28480 08920-60209  
28480 08922-60105  
A5  
A6  
A7  
08922-60105  
08920-60208  
08920-60307  
9
2
0
1
1
1
PREMOD FILTER / NSM BOARD  
SIGNAL SOURCE/ANALY (Order 08920-61849)  
CONTROLLER (DCU) (A,B,E,F,G) (Order 08922-61811)  
A7  
A7  
A7  
08920-60395  
08920-60395  
08920-60395  
5
5
5
1
1
1
CONTROLLER (DCU) (H) (Order 08922-61812)  
CONTROLLER (DCU) (S) (Order 08922-61813)  
CONTROLLER (DCU) (M) (Order 08922-61814)  
Order this BOOT ROM with above DCU (M only)  
A7U65 08920-87168  
Note: New HOST Firmware must be downloaded to the Agilent 8922M DCU Assembly by an external controller. Contact your  
local Agilent Technologies Sales and Service Office for more information  
A8  
A8  
A8  
A8  
A8  
A8  
A8  
08922-60156  
08922-60163  
08922-60158  
08922-60165  
08922-60166  
08920-60279  
08922-60175  
1
1
1
1
1
1
1
8922A/B MEMORY (Order 08922-60175)  
8922E MEMORY (Order 08922-60175)  
8922G MEMORY (Order 08922-60175)  
8922F MEMORY (Order 08922-60175)  
8922H MEMORY (Order 08922-60279)  
8922H/S/M MEMORY Without EPROM’s  
8922A/E/F/G MEMORY BOARD Without EPROM’s  
9
2
2
2
28480 08922-60163  
28480 08922-60158  
28480 08922-60165  
28480 08922-60166  
28480  
28480 08922-60175  
A9  
08922-60121  
08920-60256  
08922-61007  
08922-61044  
08920-61031  
08922-61023  
9
8
2
7
0
2
1
1
1
1
1
1
GLOBAL TEST/DEMOD BOARD (A,B,E,F,G,H,M,S)  
POWER SUPPLY REGULATOR (Order 08920-61856)  
RECEIVER MIXER (Order 08922-61807)  
PULSE ATTENUATOR (Order 08922-61844)  
OUTPUT (Order 08920-61831)  
28480 08922-60121  
28480 08922-61023  
A10  
A11  
A12  
A13  
A14  
GSM TIMING GEN / PULSE DRIVER  
9-6  
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Replacing a Part  
Replaceable Parts  
9-7  
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Replacing a Part  
Replaceable Parts  
Table 9-4  
Replaceable Parts  
Item Agilent Part  
Number  
C
D
Qty. Description  
Mfr. Mfr.Part  
Code Number  
A15 08922-61019  
6
1
MOD-PCB REF SECTION  
28480 08922-61019  
A16 08922-61004  
A17 08922-61013  
9
0
1
1
RECEIVER (Order 08922-61804)  
STEP LOOP B MOD  
28480 08922-61013  
A18 08922-61045  
A18 08922-61845  
A18 08922-69845  
8
6
6
1
1
2
SPECTRUM ANALYZER (Order Replacement Below)  
SPECTRUM ANALYZER Replacement (New)  
SPECTRUM ANALYZER Replacement (Exchange)  
28480 08922-61845  
28480 08922-69845  
A19 08920-60331  
A20 08920-60224  
0
1
1
1
MEASUREMENT BD (Order 08920-61836)  
CRT DRIVER (New A/B/E/G Only)  
A20 08920-60192  
A21 08922-60259  
A22 08920-61005  
2
3
8
6
1
1
1
1
CRT DRIVER (New F/H/M/S Only)  
GPIB INTERFACE  
28480 08922-61859  
28480 08920-61005  
28480 08922-00096  
DISPLAY Assembly  
CRT SHIELD  
44  
08922-00096  
A23 08922-61001  
A23 08922-61801  
A23 08922-69001  
A23 08922-61133  
A23 08922-61897  
A23 08922-69097  
6
4
2
6
4
4
1
1
1
1
1
1
INPUT SECTION (Order Replacement Below) (A,B,E,G,F,H)  
INPUT SECTION Replacement (New) (A,B,E,G,F,H)  
INPUT SECTION Replacement(Exchange) (A,B,E,G,F,H)  
INPUT SECTION (Order Replacement Below) (M,S)  
INPUT SECTION Replacement (New)(M,S)  
28480 08922-61801  
28480 08922-69001  
28480 08922-61801  
28480 08922-61801  
INPUT SECTION Exchange (M,S)  
A24 08920-61010  
A24 08920-61810  
A24 08920-69010  
5
3
2
1
1
1
HIGH POWER ATTENUATOR (Order Replacement Below)  
HIGH POWER ATTENUATOR Replacement (New)  
HIGH POWER ATTENUATOR Replacement (Exchange)  
A, B, E, G, G option R10, G option R11  
28480 08920-61810  
28480 08920-69010  
High Power  
Attn. for:  
A24 08922-61101  
A24 08922-61808  
A24 08922-69101  
2
2
2
1
1
1
8dB LOW POWER ATTENUATOR (Order Replacement Below)  
8dB LOW POWER ATTENUATOR Replacement (New)  
28480 08922-61101  
28480 08922-61808  
28480 08922-69101  
8dB LOW POWER ATTENUATOR Replacement (Exchange)  
E option R71, E option R73, G option R72, G option R74, F, H, M, S  
Low Power  
Attn. for:  
A25 08922-61010  
A26 08922-61013  
A27 08922-61006  
7
0
1
1
1
1
SUM LOOP (Refer to ADJUSTMENT, Chapter 7)  
STEP LOOP A (Refer to ADJUSTMENT, Chapter 7)  
DAC/UPCONVERTER  
28480 08922-61010  
28480 08922-61013  
28480 08922-61006  
9-8  
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Replacing a Part  
Replaceable Parts  
9-9  
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Replacing a Part  
Replaceable Parts  
Table 9-5  
Replaceable Parts  
Item Agilent Part  
Number  
C D Qty. Description  
Mfr. Code Mfr.Part Number  
A28 08922-61043  
08645-60132  
08645-60133  
0515-1860  
6
6
7
5
0
7
6
3
9
4
6
2
9
0
1
2
1
8
8
5
0
2
3
1
1
1
4
1
1
1
1
8
2
4
4
1
8
4
4
4
8
4
1
1
8
4
POWER SUPPLY  
BD AY-PWR S STBD  
BD AY-FUSE  
28480  
28480  
28480  
08922-61043  
08645-60132  
08645-60133  
SCREW 1.5FM 3.5 TX 00000  
ORDER BY DESCRIPTION  
08645-60134  
08645-60134  
08645-61155  
08645-61122  
08922-60141  
0515-1137  
BD AY-PWR Q PORT  
FAN ASSY 2 CKT  
28480  
28480  
28480  
08645-61115  
PWR LN MDL ASSY  
08645-61122  
BD AY-POWER SPLY 28480  
08922-60141  
SMM3.0 50 PN TX  
SMM3.0 6SEMPTX  
SMM4.0127 PN TX  
NUT-SHMET U 6-32  
FUSE 5A 250V F  
WSHR-LK HLCL  
WSHR LK 3.5ID  
00000  
00000  
00000  
00000  
00000  
00000  
00000  
00000  
00000  
00000  
00000  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
08645-21005  
0515-1851  
0515-1960  
0590-1794  
2110-0010  
2190-0584  
2190-0585  
2190-0586  
WSHR LK M4.OID  
SM 632 .562PNPD  
WSHR FL .156ID 6  
WSHR FL M3.5 ID  
2360-0229  
3050-0686  
3050-0892  
9100-4757  
XFMR PWR100/240V 00000  
PANEL REAR MCHND 28480  
WSHR-SHLDR, INSUL 28480  
WSHR-SHLDR, INSUL 28480  
08645-21005  
08645-21031  
08645-21032  
08645-21031  
08645-21032  
9-10  
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Replacing a Part  
Replaceable Parts  
9-11  
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Replacing a Part  
Replaceable Parts  
Table 9-6  
Replaceable Parts  
Item  
Agilent Part  
Number  
C
D
Qty. Description  
Mfr. Mfr.Part Number  
Code  
A31  
A32  
A32  
A32  
A32  
08922-60247  
08922-60146  
08922-60162  
08922-60167  
08922-60176  
9
8
8
8
8
1
1
1
1
1
MGSM / CODEC (E/F/G/H/M/S Only)  
28480 08922-60147  
28480 08922-60146  
28480 08922-60162  
28480 08922-60167  
28480 08922-60167  
GSM CONTROLLER (Order 08922-60176)  
GSM CONTROLLER (Order 08922-60176)  
GSM CONTROLLER (Order 08922-60176)  
GSM CONTROLLER Without EPROMS  
A33  
08922-60202  
7
1
HOP CONTROLLER  
28480 08922-60202  
A34  
A34  
08922-60142  
08922-60244  
4
6
1
1
RTI BYPASS 8922 (A Only)  
28480 08922-60142  
28480 08922-60144  
GSM RTI 8922 (E/F/G/H/M/S Only)  
A35  
A35  
08922-60160  
08922-60152  
6
6
1
1
PROTOCOL INTERFACE (G/H Opt 003 Only)  
”B” REFERENCE (B Only)  
28480 08922-60160  
28480 08922-60152  
A36  
A37  
A38  
457  
458  
08922-60154  
08922-60151  
08645-60137  
08922-00017  
08922-00018  
8
5
1
6
7
0
1
1
1
1
1
2
FIFO GPIO 8922B (B Only)  
SEQ CONTROLLER (B Only)  
BD-AY-TIMEBASE (Opt.001 Only)  
BRACKET-TIMEBASE  
28480 08922-60154  
28480 08922-60151  
28480 08645-60137  
28480 08922-00017  
28480 08922-00018  
COVER-TIMEBASE  
459,460 2360-0195  
SM 632 .312PNPD  
00000 ORDER BY  
DESCRIPTION  
461  
462  
W27  
2190-0102  
2950-0035  
08922-61056  
8
8
1
1
WSHR LK .472ID  
NUT-HEX 15/32-32  
00000 ORDER BY  
DESCRIPTION  
00000 ORDER BY  
DESCRIPTION  
1
4
4
1
1
1
CX F SMC-BNC (CABLE)  
CA MCNDCT 6CKT (RIBBON CABLE)  
XTAL OSC-10 MHZ  
28480 08922-61056  
28480 08645-61089  
28480 10811D  
W100 08645-61089  
Y1  
10811D  
9-12  
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Replacing a Part  
Replaceable Parts  
9-13  
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Replacing a Part  
Replaceable Parts  
Table 9-7  
Replaceable Parts  
Item  
Agilent Part  
Number  
C D Qty. Description  
Mfr.  
Code  
Mfr.Part Number  
A22-W1 08920-61020  
7
7
7
1
8
6
4
6
5
5
3
6
5
5
4
9
4
1
0
2
3
3
1
2
4
8
1
1
2
4
3
8
8
0
4
3
9
0
7
0
4
5
6
6
7
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CABLE (RIBBON) CRT-MBOARD  
CABLE RF OUT ATTEN  
28480 08920-61020  
28480 08920-61012  
28480 08922-61028  
28480 08920-61016  
28480 08920-61013  
28480 08922-61027  
28480 08922-61033  
28480 08922-61035  
28480 08922-61036  
28480 08922-61034  
28480 08922-61024  
28480 08922-61016  
28480 08922-61018  
28480 08922-61026  
28480 08922-61017  
28480 08922-61020  
28480 08922-61025  
28480 08922-61022  
28480 08922-61021  
28480 08922-61015  
28480 08922-61032  
28480 08922-61008  
28480 08922-61014  
28480 08922-61031  
28480 08922-61009  
28480 08922-61029  
28480 08922-61030  
28480 08922-61056  
28480 08922-61057  
28480 08922-61059  
28480 08922-61058  
28480 08922-61037  
28480 08922-61061  
28480 08922-61055  
28480 08922-61041  
28480 08922-61040  
28480 08922-61054  
28480 08922-61039  
28480 08922-61060  
28480 08922-61005  
28480 08922-61067  
28480 08922-61068  
28480 08922-61069  
28480 08922-61051  
28480 08922-61052  
28480 08922-61053  
W1  
08920-61012  
08922-61028  
08920-61016  
08920-61013  
08922-61027  
08922-61033  
08922-61035  
08922-61036  
08922-61034  
08922-61024  
08922-61016  
08922-61018  
08922-61026  
08922-61017  
08922-61020  
08922-61025  
08922-61022  
08922-61021  
08922-61015  
08922-61032  
08922-61008  
08922-61014  
08922-61031  
08922-61009  
08922-61029  
08922-61030  
08922-61056  
08922-61057  
08922-61059  
08922-61058  
08922-61037  
08922-61061  
08922-61055  
08922-61041  
08922-61040  
08922-61054  
08922-61039  
08922-61060  
08922-61005  
08922-61067  
08922-61068  
08922-61069  
08922-61051  
08922-61052  
08922-61053  
W2  
CABLE M-BD J14 TO SCOPE IN  
CABLE (RIBBON) INPUT CONTROL  
CABLE ATTEN INPUT/HEATSINK  
CABLE M-BD J11 TO MOD AM  
CABLE M-BD J58 TO MOD DATA  
CABLE MBD J83 TO MEAS TRIG  
CABLE M-BD J84 TO MOD PL5  
CABLE M-BD J59 TO MOD CLK  
CABLE M-BD J2 TO AUD IN H  
FM DEMOD CABLE  
W3  
W4  
W5  
W6  
W7  
W8  
W9  
W10  
W11  
W12  
W13  
W14  
W15  
W16  
W17  
W18  
W19  
W20  
W21  
W22  
W23  
W24  
W25  
W26  
W27  
W28  
W29  
W30  
W31  
W32  
W33  
W34  
W35  
W36  
W37  
W38  
W39  
W40  
W41  
W42  
W43  
W44  
W45  
DEMOD DATA CABLE  
CABLE M-BD J3 TO AUD IN L  
PULSE DEMOD CABLE  
DEMOD CLOCK CABLE  
CABLE M-BD J4 TO AUD OUT  
MONITOR CABLE  
DEMOD VALID CABLE  
CABLE M-BD J61 TO 10M OUT  
CABLE M-BD J85 TO AM IN  
CABLE M-BD J63 TO E LO OUT  
CABLE M-BD J62 TO 13M OUT  
CABLE M-BD J78 TO MONITOR  
CABLE M-BD J60 TO REF IN  
CABLE M-BD J68 TO AUX IF  
CABLE M-BD J64 TO VIDEO  
CABLE SMC TO BNC OPT. 001  
CABLE SMC TO BNC  
CABLE SMC TO SMC  
CABLE SMC TO SMC 8  
SPEAKER HARNESS ASSY  
RIBBON CBL 26 CONDUCTOR  
RIBBON CBL 16 CONDUCTOR  
SR CABLE PULSE TO OUT  
SR CABLE M-BD TO PULSE  
POWER SUPPLY CABLE  
RIBBON CBL 37 CONDUCTOR  
RIBBON CBL 34 CONDUCTOR  
POWER SUPPLY CABLE ASSY  
COAX SMC-BNC (B Only)  
COAX SMC-BNX (B Only)  
COAX SMC-BNC (B Only)  
RIBBON CABLE 50 CND (B Only)  
B REF RIBBON 16 CND (B Only)  
COAX SMC-SMC (B Only)  
9-14  
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Replacing a Part  
Replaceable Parts  
Table 9-7  
Replaceable Parts  
Item  
Agilent Part  
Number  
C D Qty. Description  
Mfr.  
Code  
Mfr.Part Number  
W46  
W47  
W48  
W49  
W50  
W51  
W52  
08922-61050  
08922-61077  
08922-61078  
08922-61080  
08922-61081  
08922-61082  
08922-61077  
5
6
7
1
2
3
6
1
1
1
1
1
1
1
EMMI CABLE (G Only)  
RIBBON 16 CND  
RIBBON 26 CND  
CABLE  
28480 08922-61050  
28480 08922-61077  
28480 08922-61078  
28480 08922-61080  
28480 08922-61081  
28480 08922-61081  
28480 08922-61077  
CABLE  
CABLE SMC TO SMC  
RIBBON CABLE 16 CND  
9-15  
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Replacing a Part  
Replaceable Parts  
9-16  
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Replacing a Part  
Replaceable Parts  
9-17  
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Replacing a Part  
Replaceable Parts  
Table 9-8  
Replaceable Parts  
Item  
Agilent Part  
Number  
C
D
Qty. Description  
Mfr.  
Code  
Mfr.Part Number  
1
5040-3881  
5060-4475  
5001-8663  
0515-1114  
0535-0023  
08645-40015  
2
4
6
2
2
2
5
4
5
2
5
8
1
5
8
2
7
0
0
8
8
5
0
5
1
2
1
4
1
1
2
1
4
4
1
4
4
4
4
4
1
4
4
1
4
2
1
2
TOP FLANGE  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
28480 08645-40015  
3
SIDE FLANGE  
6
INTERNAL LID  
9
SCREW (M4X10)  
NUT + HEX DBL-CHAN  
FOOT-REAR  
11  
522  
523,524 0515-1860  
525 08922-00065  
SCREW 1.5 FM 3.5TX  
COVER BOTTOM  
SCREW, MM 3.5 X 6.8 MM  
STNDOFF-REAR PNL  
TOP COVER  
00000 ORDER BY DESCRIPTION  
28480 08922-00065  
537-540 0515-1232  
549-552 5041-8821  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
28480 08922-00066  
554  
08922-00066  
5041-8801  
FOOT FULL MOD  
SCR-MACH 3.5 X .60  
BUMPER  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
28480 08922-40004  
569-572 0515-1444  
573-576 08922-40004  
577-580 0515-0419  
581-584 0515-0380  
SMM5.0 16PN P2  
SMM4.0 10SEMPNTX  
POUCH ACCESORY  
NUT HEX  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
00000 ORDER BY DESCRIPTION  
28480 08922-61076  
585  
01650-84502  
586-589 0590-0025  
589-592 3050-0894  
WSHR FL MS.OID  
COVER-ASSY KIT  
SMM4.0 20PL PNPD  
Order 08922-21008  
FRONT HANDLE KIT  
HANDLE ASSY (Option 002)  
593  
5060-4479  
595-598 0515-0899  
604-605 08922-61076  
607  
5062-3990  
00000 ORDER BY DESCRIPTION  
28480 08922-61076  
08922-21008  
9-18  
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Replacing a Part  
Replaceable Parts  
9-19  
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Replacing a Part  
Replaceable Parts  
Table 9-9  
Replaceable Parts  
Item  
Agilent Part  
Number  
C D Qty. Description  
Mfr. Code Mfr.Part Number  
3
08922-61011  
08922-00004  
08922-00030  
8
1
3
4
2
9
4
2
4
2
5
4
4
2
7
9
3
4
4
9
8
4
1
1
1
3
1
1
2
1
1
6
1
1
1
29  
1
1
1
6
3
3
1
15  
AY-FRAME, (CHASSIS).  
CRT BRACKET  
28480  
28480  
28480  
00000  
00000  
28480  
00000  
28480  
28480  
00000  
28480  
28480  
28480  
00000  
28480  
28480  
28480  
00000  
00000  
00000  
28480  
00000  
08922-61011  
12  
114  
08922-00004  
BRACKET-REG, PCA  
SCREW MACH M3 X .5  
SMM4.0 10SEMPNTX  
BRACKET HP-IB  
08922-00030  
115-117 0515-1950  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
08922-00028  
118  
240  
0515-0380  
08922-00028  
241,242 0515-1950  
SCREW M3 X .5  
ORDER BY DESCRIPTION  
08922-00055  
244  
252  
08922-00055  
08922-00007  
PLATE STANDARD  
COVER, POWER SUPPLY  
SMM4.0 10SEMPNTX  
RF COVER  
08922-00007  
416-421 0515-0380  
ORDER BY DESCRIPTION  
08922-00032  
424  
425  
426  
08922-00032  
08922-00015  
08922-00031  
COVER, AIR DIGITAL  
COVER-AIR,AUDIO  
SMM4.0 10SEMPNTX  
TIMEBASE COVER (Opt. 001)  
COVER (B Only)  
08922-00015  
08922-00031  
427-456 0515-0380  
ORDER BY DESCRIPTION  
08922-00018  
458  
492  
492  
08922-00018  
08922-00044  
08922-00072  
08922-00044  
COVER (G/H Opt. 003 Only)  
SCREW MACH M3 X .5  
WSHR-LK .1941D  
08922-00072  
493-498 0515-1950  
499-501 2190-0124  
502-504 2950-0078  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
08922-00043  
NUT-HEX 10-32  
505  
08922-00043  
PLATE  
506-521 0515-1950  
SCREW MACH M3 X .5  
ORDER BY DESCRIPTION  
9-20  
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Replacing a Part  
Replaceable Parts  
492 Top Cover (B, E and G)  
505 Bottom Plate (B,E and G)  
252  
240 GPIB  
Mounting  
Bracket and  
241-242  
Screws  
493-  
498  
506-  
521  
244  
499-  
458  
(Opt. 001)  
501  
Washer  
502-  
504  
Nut  
114 Regular  
Mounting  
Bracket and  
115-118  
Screws  
(Not Shown)  
416-  
421,  
427-  
456  
424  
3
426  
12 CRT Bracket  
9-21  
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Replacing a Part  
Replaceable Parts  
Table 9-10  
Replaceable Parts  
Item  
Agilent Part  
Number  
C D Qty. Description  
Mfr. Code Mfr.Part Number  
21  
0515-0456  
0515-1860  
3050-0227  
3
5
3
1
1
5
SMM4.0 20MML  
00000  
00000  
00000  
ORDER BY  
DESCRIPTION  
91-95  
96-100  
SCREW 1.5 FM 3.5 TX  
WASHER .375 OD  
ORDER BY  
DESCRIPTION  
ORDER BY  
DESCRIPTION  
119  
120  
121  
08922-00014  
08922-00022  
08922-00050  
3
3
7
2
1
RF COVER (ON MOTHERBOARD)  
MBD COVER-DGTL  
28480  
28480  
28480  
00000  
08922-00014  
08922-00022  
08922-00050  
1
1
COVER-MTHR, SYS BUS  
SMM4.010SEMPNTX  
122-153 0515-0380  
32  
ORDER BY  
DESCRIPTION  
196-201 0515-0380  
2
6
SMM4.010SEMPNTX  
00000  
ORDER BY  
DESCRIPTION  
9-22  
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Replacing a Part  
Replaceable Parts  
9-23  
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Replacing a Part  
Replaceable Parts  
Table 9-11  
Replaceable Parts  
Item  
Agilent Part C D Qty. Description  
Number  
Mfr. Code Mfr.Part Number  
22,23, 112,113 0515-0380  
24,25 0515-2126  
83-86, 104-107 0515-1331  
2
8
5
5
3
2
4
2
8
4
4
1
SMM4.0 10SEMPNTX  
SMM3.0 6SEMPNTX  
SCREW M4 X 6  
00000  
00000  
00000  
00000  
00000  
00000  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
87-90  
268-270  
560  
0515-1860  
0515-1950  
0515-0380  
SCREW 1.5 FM 3.5 TX  
SCREW M3 X .5  
SMM4.0 10SEMPNTX  
9-24  
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Replacing a Part  
Replaceable Parts  
Table 9-12  
Replaceable Parts  
Item  
Agilent Part  
Number  
C D Qty. Description  
Mfr. Code Mfr.Part Number  
79-82, 108-111 0515-1331  
1
2
2
8
2
1
SCREW M4 X 6  
00000  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
203,204  
561  
0515-0380  
0515-0380  
SMM4.0 10SEMPNTX 00000  
SMM4.0 10SEMPNTX 00000  
9-25  
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Replacing a Part  
Replaceable Parts  
Table 9-13  
Replaceable Parts  
Item  
Agilent Part  
Number  
C
D
Qty. Description  
Serial Prefix 3216A and Below  
Mfr.  
Code  
Mfr.Part Number  
209  
08922-00005  
2
4
1
PLATE REAR PANEL (A Only)  
28480 08922-00005  
28480 08922-00073  
Serial Prefix 3217A and Above  
209  
08922-00073  
1
PLATE REAR PANEL (A Only)  
211,212  
213-221  
222-230  
0380-2079  
2950-0035  
2190-0102  
3
8
8
4
4
4
8
8
2
9
9
9
2
2
1
1
CONN SCREWLOCK  
NUT-HEX (A/G Only)  
WASHER LK.  
00000 ORDER BY  
DESCRIPTION  
00000 ORDER BY  
DESCRIPTION  
00000 ORDER BY  
DESCRIPTION  
231-237, 239,243 0515-1950  
SCREW M3 X .5  
00000 ORDER BY  
DESCRIPTION  
245-246  
247,249  
461  
0380-0644  
2190-0577  
2190-0102  
2950-00035  
STANDOFF, METRIC (For G/H Opt.003 Only) 00000 ORDER BY  
DESCRIPTION  
WSHR LK .1941D  
00000 ORDER BY  
DESCRIPTION  
WASHER LK.(A/G/H Only)  
NUT HEX (A/G/H Only)  
00000 ORDER BY  
DESCRIPTION  
462  
00000 ORDER BY  
DESCRIPTION  
Serial Prefix 3216A and Below  
PLATE-REAR PANEL (B Only)  
Serial Prefix 3217A and Above  
PLATE-REAR PANEL (B Only)  
WASHER LK (A/G/H Only)  
482  
08922-00048  
3
1
28480 08922-00048  
28480 08922-00074  
482  
08922-00074  
2190-0102  
5
8
1
2
483,485  
00000 ORDER BY  
DESCRIPTION  
486-488  
489  
2950-0035  
1251-0218  
8
6
3
1
NUT-HEX  
00000 ORDER BY  
DESCRIPTION  
POST CONNECTOR, LOCK (B Only)  
00000 ORDER BY  
DESCRIPTION  
Serial Prefix 3235A and Below  
8922E All Prefixes  
541  
541  
08922-00075  
08922-00049  
6
4
1
1
PLATE REAR PANEL (E/F/G/H/M/S Only)  
8922G Prefix 3240A00250 and Above  
PLATE REAR PANEL (G Only)  
28480 08922-00075  
28480 08922-00049  
9-26  
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Replacing a Part  
Replaceable Parts  
(
9-27  
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Replacing a Part  
Replaceable Parts  
Table 9-14  
Miscellaneous Replaceable Parts  
Item  
Agilent Part  
Number  
C D Qty. Description  
Mfr. Code Mfr.Part Number  
ORDERBY DESCRIPTION  
26,205-207 1400-0249  
0
0
5
9
5
0
0
5
0
1
9
2
2
3
7
2
4
1
3
4
7
1
3
1
1
9
1
1
1
1
1
2
CABLE TIE  
00000  
00000  
00000  
00000  
00000  
28480  
00000  
00000  
00000  
00000  
00000  
00000  
00000  
28480  
28480  
00000  
53  
08590-80007  
1400-1391  
5041-7250  
0400-0112  
08920-00063  
1400-0249  
0400-0112  
1400-0611  
6960-0132  
2110-0083  
2110-0055  
9230-0260  
08642-00138  
08922-00076  
5180-1871  
LBL WARNING-CRT  
CLAMP CABLE  
CABLE CLIPS  
ORDER BYDESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
08920-00063  
64,208  
67-69,78  
71-77  
238  
GROMMET, SNAP-IN  
CAUTION LABEL  
CABLE TIE  
534-536  
490  
ORDERBY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
ORDER BY DESCRIPTION  
08642-00138  
GROMMET, SNAP-IN  
CLAMP CABLE  
PLUG  
491  
210  
544  
FUSE 2.5A MED  
FUSE 4A MED  
544  
545  
ENV VOLT WARNING  
LBL-2 PERSONLIFT  
PLATE BLOCK  
LBL-BLK SERIAL  
553  
654,661  
08922-00076  
ORDER BY DESCRIPTION  
9-28  
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Replacing a Part  
Firmware Upgrades  
Firmware Upgrades  
In The Agilent 8922M  
HOST and GSM Firmware are upgraded using an external controller or Personnal  
Computer.  
In The HP/Agilent 8922A, B, E, G, F, H, S  
The firmware for the HP/Agilent 8922A,B,E,G,F,H,S is grouped in single ROM sets.  
These sets are listed below. It is recommended that a complete set is used each time a  
firmware upgrade needs to be made.  
HP Part Number  
08922-61087  
Description  
8922A/B ROM Upgrade  
08922-61088  
08922-61089  
08922-61116  
08922-61117  
08922-61149  
8922E ROM Upgrade  
8922G ROM Upgrade  
8922F ROM Upgrade  
8922H ROM Upgrade  
8922S ROM Upgrade  
9-29  
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Replacing a Part  
Firmware Upgrades  
This Page Intentionally Left Blank  
9-30  
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10  
Service Screen  
10-1  
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Service Screen  
Introduction  
Introduction  
This chapter describes the fields on the service screen. The service screen is intended to  
support component level repair and the features are of greatest use with component level  
documentation. Component level documentation is beyond the scope of this book and  
Agilent Technologies does not currently support component level support for the HP/  
Agilent 8922 product family outside of the factory.  
1. Voltage  
This field displays the voltage measured at the selected voltmeter connection.  
2. Frequency  
This field displays the frequency measured at the selected counter connection.  
3. Voltmeter Connection  
This field selects the voltage test point. The voltage will be measured and displayed in the  
voltage field.  
10-2  
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Service Screen  
Introduction  
4. Counter Connection  
This field selects the frequency test point. The frequency will be counted and displayed in  
the frequency field.  
5. Gate Time  
This field selects the gate time used by the frequency counter.  
6. Latch  
This field selects the data latch to be read or written to.  
7. Value  
This field displays the present value of the selected latch. This field is also used to set the  
latch value of writable latches.  
8. RAM Initialize  
This field clears all RAM memory. RAM memory contains recall registers and test pro-  
grams.  
A quick RAM initialize can be carried out by holding in the LOCAL and Hz keys while  
powering on the HP/Agilent 8922. Release the keys after the self test beep.  
10-3  
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Service Screen  
Introduction  
This Page Intentionally Left Blank  
10-4  
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11  
Self-Test Error Messages  
11-1  
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Self-Test Error Messages  
Introduction  
Introduction  
This chapter lists the error messages that appear on the status line of the display and on the  
message screen when the self-tests are run on power-up. This list does not include all of  
the messages that can appear under all circumstances.  
”Battery Backed RAM Initialized. Structures corrupt.”  
”Battery Backed RAM Initialized. Option RAM not maintained.”  
”Battery Backed RAM Initialized.Optional RAM not found.”  
”Battery Backed RAM Initialized. Standard RAM not maintained.”  
”All host processor self-tests passed.”  
”PANIC - UNKNOWN ERROR OCCURRED.”  
”Attempt to write EEPROM failed.”  
”Communication failure with the Rcvr Step Loop Board.”  
A serial communications failure occurred with the A17 Step Loop assembly.  
”Communication failure with the Sig Gen Step Loop Board.”  
A serial communications failure occurred with the A26 Step Loop A assembly.  
”Communication failure with the NSM/PMF Board.”  
A serial communications failure occurred with the A5 Premod Filter and NSM assembly.  
”Hop Controller communication channel Failure.”  
”Self-test failure in Hop Controller.”  
The A33 Hop Controller assembly failed its self-test.  
”Hop Controller did not post self-test results.”  
”DSP Analyzer communication Channel Failure.”  
”Self-test failure in DSP Analyzer.”  
The A9 Global Test and Demod assembly failed its self-test  
”DSP Analyzer did not post self-test results.”  
”Protocol Processor Communication Channel Failure.”  
”Self-test failure in Protocol Processor.”  
The A32 GSM Controller assembly failed its self-test.  
11-2  
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12  
Module I/O Specifications  
12-1  
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Module I/O Specifications  
Introduction  
Introduction  
This chapter contains tables of module input/output specifications.  
These do not include tables for some of the digital boards due to complexity. In most cases  
it will be quicker to verify digital failures using board swap than to verify through  
measurement.  
This chapter is used with the Using the Service Kit, Instrument Block Diagram and Block  
Diagram Theory chapters to verify a specific module or assembly failure when diagnostics  
and performance tests do not provide a high level of certainty.  
12-2  
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Module I/O Specifications  
A2 Audio Analyzer 2  
A2 Audio Analyzer 2  
Use extender card 08920-60142  
Power Supplies  
+5 V  
J1(21,22)  
200 mA  
80 mA  
80 mA  
+12 V  
J1(19)  
-12 V  
J1(20)  
GND (Analog)  
GND (Digital)  
J1(6,7,10,13,14,17,18)  
J1(23,24,25,27)  
Inputs  
AUDIO INPUT MUX  
From A3 Audio Analyzer 1  
Selected Input — FIL_AUD J1(12)  
Input Z  
1 M Ω DC Coupled  
± 5 Vp  
Voltage Range  
From Modulation Distribution Board  
Selected Input — MOD_MON J1(16)  
Input Z  
100 kΩ DC Coupled  
DC AUDIO INPUT  
From A3 Audio Analyzer 1  
DC_AUD J1(15)  
Input Z  
100 kΩ  
± 5.0 Vp  
Voltage range  
12-3  
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Module I/O Specifications  
A2 Audio Analyzer 2  
Outputs  
AUDIO OUT MEAS MUX  
To A19 Measurement Board  
AUD2_VM J1(11)  
Selected path = POS/NEG peak detectors. Input = FILT_AUD  
Response Time  
DC Offset  
< 1 ms  
(Rise time)  
< ± 15 mV  
Detector Range  
0.424 to 5 V Peak  
Selected path = Pre Notch RMS detectors. Input=FILT_AUD  
Specified Meas. Range 0.296 to 1.67 V  
rms  
Selected path = Post Notch RMS detectors. Input FILT_AUD  
RMS detector settling time Slow (<= 200 Hz) < 673 µs  
Fast (> 200 Hz) < 93 µs  
Specified Meas. Range  
0.200 to 1.67 V Gain < 40 dB  
rms  
0.095 to 1.67 V Gain = 40 dB  
rms  
3 dB Bandwidth  
> 160 kHz 70 dB total Gain  
Notch Attenuation  
> 40 dB 1 kHz ± 20 Hz  
> 65 dB 1 kHz ± 5 Hz  
Selected path = DC_AUDIO Input =FILT_AUD  
Input Impedance  
DC Offset  
100 kΩ  
16 mV Over Temp  
Selected path = Pre Notch Audio Input = FILT_AUD  
DC Offset  
< ± 16 mV Over Temp  
Available Gain  
30 dB  
Selected path = Post Notch Audio Input = FILT_AUD  
DC Offset  
< ± 16 mV Over Temp  
Available Gain  
70 dB  
SPEAKER  
SPK1 J1(2)  
Max Output (8 Ω)  
250 mW Input = FILT_AUD  
0 to 20  
Amp Gain Adjust Range  
ALC circuit output level  
0.25 Vp ALC Mode  
12-4  
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Module I/O Specifications  
A3 Audio Analyzer 1  
A3 Audio Analyzer 1  
Use extender card 08920-60142.  
The Primary function of Audio Analyzers 1 and 2 is to provide oscilloscope functions.  
Power Supplies  
+5 V  
J1(21,22)  
20 mA  
60 mA  
60 mA  
+12 V  
J1(19)  
-12 V  
J1(20)  
GND (Analog)  
GND (Digital)  
J1(3,4,8,12,13,17,18)  
J1(23,24,26,27)  
Inputs  
AUDIO INPUT MUX  
DEMOD_AUD J1(6) From A16 Receiver  
MOD_MON J1(10) From Mod Distribution  
EXT_SCOPE J1(11) From Front Panel  
AUX_IN2 J1(5)  
DET_LO J1(7) From Input Section  
AUD_IN_HI J1(1) From Front Panel  
AUD_IN_LO J1(2) From Front Panel  
Input Z  
1 M Ω  
100 k Ω  
DEMOD_AUD, MOD_MON  
EXT_SCOPE, AUX_IN2, DET_LO  
AUD_IN_HI  
= 1 M Ω  
< 65 pF to GND. (Non-  
Floating GND input).  
Ground AUD_IN_LO  
Floating  
= 1 M Ω  
65 pF to GND.  
< 200 Ω  
12 Vp  
GND  
DEMOD_AUD, MOD_MON  
EXT_SCOPE, AUX_IN2, DET_LO  
AUD_IN_HI,AUD_IN_LO  
Maximum Input  
(Hardware Limit)  
9.8 Vp  
98 Vp  
12-5  
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Module I/O Specifications  
A3 Audio Analyzer 1  
Outputs  
To Audio Analyzer 2  
FIL_AUD J1(15)  
Output Z  
< 1 Ω  
Unit Gain Opamp  
Selected Inputs (DEMOD_AUD,MOD_MON,EXT_SCOPE, AUX_IN2, DET_LO)  
Total Path Accuracy  
0,20,40 dB, No Filters  
0.02 to 10 kHz ± 0.45 %  
0.02 to 25 kHz ± 1.05 %  
0.02 to 75 kHz ± 7.7 %  
DC Offset  
< 13 mV  
< 1.3 V  
< .07%  
0 dB Gain  
40 dB Gain  
THD + Noise  
Total Path Accuracy  
1 kHz Rate, 15 kHz BW.  
Selected Inputs (AUD_IN_HI,AUD_IN_LO)  
-20,0,20 dB, No Filters  
.02 to 12 kHz ± 0.704 %  
.02 to 25 kHz ± 1.3 %  
.02 to 75 kHz ± 7.95 %  
3 dB Freq, Thru Path  
-20 dB  
0.0 dB  
+20 dB  
< 1 Hz and > 200 kHz  
< 1 Hz and > 200 kHz  
< 1 Hz and > 100 kHz  
12-6  
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Module I/O Specifications  
A3 Audio Analyzer 1  
To A19 Measurement Board  
AUD1_VM J1(16)  
> 1 Ω  
< ± 9 mV  
Selected input =Range/Over-voltage detector  
< 1 ms (Rise time)  
Output Z  
Unity Gain buffer  
DC Offset  
Response Time  
DC Offset  
± 15 mV  
Specified input range  
Accuracy  
.29 to 5 Vp  
± 2%  
20 Hz to 50kHz  
20 Hz to >200 kHz.  
B.W. (3 dB)  
Selected input = DC Audio Path  
Filter 3 dB BW  
Step Response (1%)  
DC Offset  
2.1 Hz  
<400 ms  
± 21 mV  
± .1 mV  
± 3 mV  
Uncalibrated  
DC Offset  
Calibrated  
DC Offset drift  
DC path gain accuracy  
OverTemperature  
To Audio Analyzer 2  
DC_AUDIO J1 (14)  
Front Panel Input  
Other Inputs  
DC Offset  
± 15 mV  
± 6.3 mV  
12-7  
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Module I/O Specifications  
A4 Modulation Distribution  
A4 Modulation Distribution  
Use extender card 08920-60141  
Power Supplies  
+12 V  
J1(29)  
120 mA + Audio Output Drive  
12 mA  
+5 V  
J1(33,34)  
J1 (30)  
-12 V  
120 mA + Audio Output Drive  
GND (Analog)  
GND (Digital)  
J1(27,28)  
J1(35,36,37)  
Inputs  
From Front Panel BNC input  
EXT_MOD J1(1)  
Input Z  
600 Ω  
15 Vp  
1 Vp  
Max Input Level  
Full Scale Input  
From A6 Signal Source/Analyzer  
AFG1 J1(11), AFG2 J1(13), AFG_GND J1(12)  
Input Z  
13.36 k Ω  
46.7 k Ω  
3.5 Vp  
GND Input Z  
Full Scale Input  
1.3 V  
rms  
AFG1 and AFG2 are both sine wave signals with the audio frequency set on the RF  
Generator page, the attenuation takes place on the modulation distribution board. To  
obtain a signal for measuring AFG2, select TEST MENU, then AF_diags. From the AF  
diags submenu, select MODULATION DISTRIBUTION INTERNAL TEST, using single  
step, stop on test #1. AFG1 will measure at >500 mV and > 1.8 Vp-p  
rms  
12-8  
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Module I/O Specifications  
A4 Modulation Distribution  
Outputs  
To Front Panel BNC  
AUDIO_OUT_HI J1(7)  
Output Z  
< 1 Ω  
Maximum Output Voltage  
5 V  
OpenCircuit  
Hardware spec.  
rms  
Max Output Current  
40 mA Peak  
20 mA peak  
5.953 ± 1.51%  
±.02 dB  
Spur Requirements  
Full Scale Gain (Uncal)  
Attenuator Accuracy  
LFS1/2 to FP, DAC=255, 600 Ω Load.  
(DC) (20,40,60 dB)  
The output of AUDIO_OUT_HI can be set on the RF Analyzer page.  
AM_MOD J1(20)  
AM MOD Ouptut Z  
Full Scale output  
< 400 Ω  
4 Vp  
Load 100 kΩ/4000 pF  
Uncalibrated Path Gain  
Gain (F.P. Input)  
DAC=255, 1 kHz Gain (AFG1 Path)  
DAC=255 , 1 kHz  
2.37 ± 1.5%  
5.12 ± 2.5%  
± 0.02 dB  
< 3 dB  
Attenuator Accuracy  
High Freq roll off  
Low Freq roll off  
( 1 kHz) (20 dB)  
150 kHz  
< 1 dB  
20 Hz AM port EXT AC Standard AM load.  
To route the input signal AFG1 to the output AM_MOD, access the SERVICE Screen.  
Select the latch ’dstr_mod_destination’ and change the value to any odd number (for  
example ’3’). Select ’dstr_afg1_to_mod’ and change the value to any even number (for  
example ’2’) and measure.  
MOD_MON J1(18)  
Output Z  
< 1 k Ω  
MOD_MON can also be accessed using the SERVICE Screen. Use latch  
’dstr_monitor_select’.  
’2’ signal at un-attenuated values of AFG1.  
’3’ use external source connected to ’Modulation_In_AmSpeech’  
’4’ signal at levels set up at RF Generator page.  
12-9  
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Module I/O Specifications  
A5 Premodulation Filter and NSM  
A5 Premodulation Filter and NSM  
Use extender card 08922-60132.  
Power Supplies  
+15 V J1(12) J2(20)  
TP 2  
TP 3  
TP 1  
TP 4  
TP 5  
15 mA  
15 mA  
1.1 A  
-15 V J1(11) J2(23,24)  
+5 V  
-5 V  
J1(15,16) J2(23,34)  
J1(19)  
5 mA  
Ground J1(2-4,6-10,13-14,17-18,20-21,23-40)  
J2(2-4,17-18,21-22,25-26,28-32,34-37)  
Inputs  
From A34 GSM-RTI Assembly  
PMF_CLK J1(5)  
Level:  
Frequency:  
TTL  
270.833 ±2 kHz  
Clock signal input is a square wave of duty cycle 50% and approximately 4.4Vp-p when  
measured on an oscilloscope. To view on a spectrum analyzer, set centre frequency to  
270 kHz and span to 540 kHz, the peak marker should read approximately +12dBm.  
4 Vp-p  
12-10  
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Module I/O Specifications  
A5 Premodulation Filter and NSM  
From A34 GSM-RTI Assembly  
PMF_DATA J1(1)  
TTL  
Level:  
Rate:  
270.833 kbps  
Format:  
Non-differential data encoded  
The PMF_DATA signal is difficult to measure accurately without a high speed  
oscilloscope or logic analyzer. Using a Spectrum Analyzer, an increased noise floor can be  
seen when probed about the centre frequency of 270 kHz. Using an oscilloscope, the  
signal can be measured at 4.4 Vp-p. On a DVM, 2.25 Vdc.  
From A15 Reference GSM-RTI Assembly  
10 MHz Ref B J2(33)  
Frequency: 10 MHz ± 500 Hz  
Wave Shape:  
Level:  
Sine  
>10 dBm  
< −25 dBc  
Harmonics:  
The 10 MHz Reference signal can be measured on an oscilloscope at 880 mV and  
rms  
2.6 Vp-p. On a Spectrum Analyzer, the marker will be approximately +10dBm.  
NOTE:  
The Premodulation Filter and NSM assembly are used to convert User Digital Data and  
clock signals into GMSK.  
Outputs  
To A27 DAC/Upconverter  
NSM_IF_CLK J2(1)  
Frequency:  
Level:  
17.3333 MHz ± 250 Hz  
TTL  
The NSM_CLK signal can be sensed on the SERVICE Screen using the  
’nsm_pmf_clk_pres_int_sense’ latch, a value of 1 for lock and ’0’ for OOL (Out Of Lock)  
state. An OOL condition can cause high phase and frequency error problems. See  
Figure 4-1 on page 12-12 for typical oscilloscope readings. On a Spectrum Analyzer, the  
peak marker should be >+6 dBm.  
12-11  
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Module I/O Specifications  
A5 Premodulation Filter and NSM  
Figure 4-1  
Typical Oscilloscope Display  
Channel 1  
Timebase  
= 500.0 mvolts/div  
= 20.0 ns/div  
Offset  
= 1.810 volts  
Trigger mode: Edge on positive  
edge on Chan1  
Delay  
= 0.000 s  
Trigger Levels  
Ch. 1 Parameters  
P-P Volts  
Fall Time  
Period  
= 3.187 volts  
= 7.540 ns  
Chan1  
Holdoff  
= 1.810 volts  
= 70.000 ns  
Rise Time  
Frequency  
+ Width  
= 13.660 ns  
= 17.3310 MHz  
= 32.710 ns  
= 57.700 ns  
= 24.990 ns  
= 187.5 mvolts  
- Width  
Preshoot  
Overshoot  
RMS Volts  
= 250.0 mvolts  
= 2.343 volts  
Duty Cycle = 56.68%  
Serial I/O  
From A34 RTI Assembly  
Hop Control E/I_NSM J2(38)  
CLK_NSM J2(39)  
DAT_NSM J2(40)  
Levels:  
TTL  
Clock Rate:  
≅ 100 kHz (bursted) non-hopping generator  
≅ 1 MHz (bursted) hopping generator  
The HOP CONTROL lines can be measured at +5Vdc  
12-12  
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Module I/O Specifications  
A6 Signaling Source/Analyzer  
A6 Signaling Source/Analyzer  
Use extender card 08920-60140.  
Power Supplies  
+12 V  
J1(9)  
21 mA  
650 mA  
41 mA  
+5 V  
J1(37,39,40)  
J1(10)  
-12 V  
D_Ground  
A_Ground  
J1(13,14,31,32)  
J1(2,7)  
Inputs  
From A2 Audio Ananlyzer 2  
PROC_AUD J1(11)  
Input Impedance  
41.6 k  
Minimum Input Level  
Maximum Input Level  
Analyzer timebase  
0.2 Vpk  
5 Vpk  
12 MHz ± 0.01%  
12-13  
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Module I/O Specifications  
A6 Signaling Source/Analyzer  
Outputs  
To A4 Modulation Distribution Assembly  
AFG1 J1(3), AFG2 J1(5)  
Freq Range  
DC to 25 kHz  
Freq Resolution  
0.1 Hz  
Freq Accuracy  
0.01 % of setting  
2.5 Vpk  
Output level (Max)  
Output Lvl Resolution  
Output Lvl Acc (Uncal)  
Output Channel Clock  
Output Impedance  
THD+Noise (Sine)  
12 Bits (LSB = 5V/4096)  
± 0.0183% F.S.  
838.8608 kHz  
1.336 k Ω (680 pF Shunt )  
0.10% (Output = 2.5 Vpk)  
(Meas BW 80 kHz)  
(20 Hz to 25 kHz)  
For levels and setting up signals for measuring,  
see “A4 Modulation Distribution”, page 12-8.  
12-14  
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Module I/O Specifications  
A9 Global Test and Demod  
A9 Global Test and Demod  
Use extender card 08922-60133.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(29,30) - TP 15  
J2(25,26)  
140 mA  
80 mA  
1.0 A  
J2(23,24)  
-5 V  
J2(21,22)  
20 mA  
Ground  
J1(1,33,4,17,18,20)  
J3(1-4,6-14,16-20) - TP 14/16  
Inputs  
From A16 Receiver  
10.7M_IF J1(7)  
10.7 MHz ± 50 kHz  
3 dBm ± 1 dB  
<- 40 dBc  
Frequency:  
Level:  
Harmonics:  
The 10.7 MHz is orginated from the A16 Receiver. It is down converted to 700 kHz  
± 50 kHz within the Global Test and Demod assembly. To obtain a reading either with an  
oscilloscope (See Figure 4-2 on page 12-16) or spectrum analyzer, the signal needs to be  
looped back. This can be done using the RF diagnostics and pausing on test #1 for  
Receiver Down converters (with spectrum analyzers).  
If the generator path is in doubt, use a known working reference signal into a port,  
remembering to check settings on RF analyzer page for frequency and port settings.  
12-15  
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Module I/O Specifications  
A9 Global Test and Demod  
Figure 4-2  
Expected Output  
Channel 1  
Timebase  
= 500.0 mvolts/div  
= 20.0 ns/div  
Offset  
= -50.00 volts  
Trigger mode: Edge on positive  
edge on Chan1  
Delay  
= 0.0000 s  
Trigger Levels  
Ch. 1 Parameters  
P-P Volts  
Fall Time  
Period  
= 1.468 volts  
= 27.000 ns  
= 93.460 ns  
= 46.670 ns  
= 93.75 mvolts  
Chan1  
Holdoff  
= -50 mvolts  
= 70.000 ns  
Rise Time  
Frequency  
+ Width  
= 27.540 ns  
= 10.6998 MHz  
= 46.790 ns  
- Width  
Preshoot  
Overshoot  
RMS Volts  
= 31.25 mvolts  
= 482.0 volts  
Duty Cycle = 50.06%  
12-16  
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Module I/O Specifications  
A9 Global Test and Demod  
From A15 Reference Section  
20M_REF_A J1(11)  
Wave Shape:  
Sine  
Frequency:  
Level: >  
20 MHz ± 1 ppm Requires Ext Ref of 1 ppm  
0 dBm (500 mV  
)
rms  
Harmonics:  
< -25 dBc  
Spurs (> 5 kHz offsets):  
< -110 dBc  
Figure 4-3 on page 12-17 shows the expected oscilloscope reading. This signal can also  
be clearly seen on a spectrum analyzer.  
Figure 4-3  
Expected Display  
Channel 1  
Timebase  
= 200.0 mvolts/div  
= 10.0 ns/div  
Offset  
= -24.00 volts  
Trigger mode: Edge on positive  
edge on Chan1  
Delay  
= 0.0000 s  
Trigger Levels  
Ch. 1 Parameters  
P-P Volts  
Fall Time  
Period  
= 887.5 volts  
= 16.770 ns  
= 49.420 ns  
= 23.880 ns  
= 50.00 mvolts  
Chan1  
Holdoff  
= -24.00 mvolts  
= 70.000 ns  
Rise Time  
Frequency  
+ Width  
= 14.810 ns  
= 20.2347 MHz  
= 25.510 ns  
- Width  
Preshoot  
Overshoot  
RMS Volts  
= 0.0000 mvolts  
= 290.6 mvolts  
Duty Cycle = 51.67%  
12-17  
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Module I/O Specifications  
A9 Global Test and Demod  
Output to Rear Panel System Bus  
F_CNT J1(21)  
Sine  
Waveshape:  
Levels:  
100 mV minimum, +5 dBm  
700 kHz  
Frequency:  
To set up this signal for measuring, follow the same procedure as for "10.7M_IF J1(7)",  
page 12-15, by running the RF Diagnostics. The signal can be seen on a spectrum analyzer  
or measured on an oscilloscope, see Figure 4-4 on page 12-18 for a typical reading.  
Figure 4-4  
Typical Display  
Channel 1  
Timebase  
= 1.000 volts/div  
= 2000 ns/div  
Offset  
= -280.0 mvolts  
Trigger mode: Edge on positive  
edge on Chan1  
Delay  
= 0.0000 s  
Trigger Levels  
Ch. 1 Parameters  
P-P Volts  
Fall Time  
Period  
= 4.625 volts  
= 423.660 ns  
= 1.42943 ns  
= 688.450 ns  
= 62.49 mvolts  
Chan1  
Holdoff  
= -280.00 mvolts  
= 70.000 ns  
Rise Time  
Frequency  
+ Width  
= 423.590 ns  
= 699.580 kHz  
= 740.980 ns  
= 0.0000 mvolts  
= 1.617 volts  
- Width  
Preshoot  
Overshoot  
RMS Volts  
Duty Cycle = 51.83%  
12-18  
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Module I/O Specifications  
A11 Receiver Mixer  
A11 Receiver Mixer  
No extender card required.  
Power Supplies  
+5 V  
GND  
PC1  
70 mA  
Chassis  
Inputs  
From A23 Input Section  
1st_MIX_IN J2  
Frequency Range  
Level - using known reference -20 dB compared to reference  
connected to RF IN/OUT setting  
0.4 to 1000 MHz  
NOTE:  
Ensure the reference setting and RF Analyzer are set to the same frequency.  
From A17 Step Loop B  
EXT_REF_IN J1  
Frequency Range  
Input Level  
500 to 1000 MHz  
3 ± 3 dBm  
LO (Local Oscillator) Frequency will be 114.3 MHz or 614.3 MHz away from frequency  
set on RF Analyzer page depending on which one is furthest away from chosen analyzer  
frequency. See Figure 4-5 on page 12-20 for a typical display.  
12-19  
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Module I/O Specifications  
A11 Receiver Mixer  
Figure 4-5  
Typical Display  
Channel 1  
Timebase  
= 130.0 mvolts/div  
= 875 ps/div  
Offset  
= 0.000 volts  
Trigger mode: Edge on positive  
edge on Chan1  
Delay  
= 0.0000 s  
= 387.5 mvolts  
= 420 ps  
Trigger Levels  
Ch. 1 Parameters  
P-P Volts  
Fall Time  
Period  
Chan1  
Holdoff  
= 0.000 volts  
= 70.000 ns  
Rise Time  
Frequency  
+ Width  
= 410 ps  
= 714.286 MHz  
= 690 ps  
= 1.40 ns  
- Width  
Preshoot  
= 710 ps  
Overshoot  
RMS Volts  
= 0.0000 volts  
= 135.7 mvolts  
= 0.000 volts  
Duty Cycle = 49.28%  
12-20  
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Module I/O Specifications  
A11 Receiver Mixer  
Outputs  
To A16 Receiver  
RCVR_IN J3  
Typical Output Levels  
Normal  
−27 to −37 dBm  
Underrange  
−37 to −60 dBm  
Conversion Gain  
−10 ± 2 dB Temp, .4 to 1000 MHz In.  
Flatness Uncal (± 5 Mhz) (Referenced from I.F.center )  
614 MHz I.F.  
114.3 MHz I.F.  
IF Filter 114.3 MHz  
Center  
± 1.5 dB  
± 1.5 dB  
114.3 ± 5 MHz  
B.W. (1 dB)  
Rejection  
40 MHz ± 5 MHz  
> 35 dB +885 MHz  
IF Filter 614.3 MHz  
Center  
614.3 ± 0.1 MHz Adjustable.  
10 MHz ± 0.1 MHz  
B.W. (1 dB)  
Rejection  
> 50 dB + 885 MHz  
NOTE:  
To measure RCVR_IN, the connection must T’ed and a DC blocking capacitor used on the  
measurement cable. This is to maintain the DC controlling voltage from A16 Receiver,  
which controls the filters within the receiver mixer. It also the blocking capacitor prvents  
the controlling voltage being loaded by measurement equipment.  
Use a known working reference into RF IN/OUT port, or if in doubt, directly into RF  
socket on receiver mixer. Ensure frequency and port settings are correct on the RF  
Analyzer page. Reduce expected input level if oscilloscope or spectrum analyzer do not  
show a signal.  
12-21  
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Module I/O Specifications  
A13 Output  
A13 Output  
Use extender card 08922-90129.  
Use coax jumpers on Plug 1, pins 3, 17 and Plug 3, pin 13.  
Power Supplies  
+5 V  
J2(4)  
50 mA  
310 mA  
80 mA  
10 mA  
+12 V J2(2)  
−12 V J2(3)  
+38 V J2(1)  
GND  
J1(1,2,4,5,6,7,8,9,10,11,12,13,14,15,16,18,19,20)  
J3(1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,17,18,19,20)  
Inputs2  
From Sum Loop A25 (Change frequency on RF Generator page)  
(Coax jumper connection) SGS_500_10000M J1(17)  
Freq Range  
480 - 1015 MHz  
Input Level required  
Spectral Purity required  
Harmonics  
0 dBm ± 2 dB  
2nd < -10 dBc 3rd - 5th < -15 dBc  
< -70 dBc  
Spurs  
From A15 Reference Assembly  
(Coax jumper connection) OUT_1G_REF J1(3)  
Input Level 1 dBm ± 3 dB  
Harmonics  
Spurs  
< -10 dBc  
< -80 dBc > 5 kHz offsets 500-1500 MHz  
< -40 dBc < 500 MHz and > 1500 MHz.  
OUT_1G_REF only present for RF Generator frequencies from 0 to 291 MHz, used for  
frequency translation.  
12-22  
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Module I/O Specifications  
A13 Output  
From A4 Modulation Distribution  
Input Z  
AM_MOD J2(7)  
25 k Ω 5000 pF parallel shunt.  
25% AM / V  
Sensitivity  
See "A4 Modulation Distribution", page 12-8 for measurement procedure.  
Outputs  
To A12 Pulse Attenuator  
(Coax jumper connection) MAIN_RF_OUT J3(13)  
Freq  
Main Band  
501 to 1000 MHz  
249 to 500 MHz  
Divide Band  
Heterodyne Band 0.25 to 248.9999999 MHz  
Output Level  
Maximum Output Power  
0.25 - 249 MHz  
249 - 500 MHz  
500 - 1000 MHz  
1 to 8 dBm  
> 13 dBm  
> 15 dBm  
> 16 dBm  
Calibrated vernier rng  
Normal  
0 tp 16 dBm  
Overrange  
Minimum Output Lvl(Off) < −40 dBm  
Modulator Rangefor AM.  
Spectral Purity — (Only contributions of the outputmodule)  
Spurs  
< -65 dBc  
> 5 kHz Offset 5x4,3x2,RF  
D feed, and L.O. feedthrough.  
Harmonics  
< -36 dBc  
Ampl < +1 dBm + atten loss  
(atten loss = 9 dB worst case)  
12-23  
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Module I/O Specifications  
A14 Pulse Driver  
A14 Pulse Driver  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pins 3, 13 and 17. Plug 3, pins 3, 9 and 17.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(2)  
J2(3)  
J2(4)  
Ground  
J3(1-2,4-8,10-16,18-20)  
J1(1,4,6-12,14,16,18-19)  
Inputs  
From A15 Reference Section  
1M_REF_C P3(3)  
Frequency:  
Levels:  
1 MHz ± 5 Hz  
CMOS  
Duty Cycle:  
Waveshape  
Duty Cycle  
Amplitude  
Level  
800 ns high, 200 ns low  
Square Wave (Not a true square wave)  
25%  
4.4 Vp-p  
> 7 dBm  
Vp-p  
225 ns  
775 ns  
12-24  
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Module I/O Specifications  
A14 Pulse Driver  
Outputs  
To 13 MHz output on Rear Panel  
13M_REF_OUT_A P3(17)  
Waveshape:  
Sine  
Level:  
>7.5 dBm  
50 Ω  
Nominal Output Impedance:  
Amplitude  
3.75 Vp-p  
1.7 V  
rms  
To A34 RTI Assembly  
13M_REF_OUT_B  
Waveshape:  
Frequency and  
Harmonics  
HP/Agilent 8922E,G,H,  
M Only  
Level:  
>7.5 dBm  
5.3 Vp-p  
Amplitude  
To A12 Pulse Attenuator  
ATTEN_SELECT  
P1 (11, 13, 15, 17, 20)  
Level  
Pin 20  
+5 vdc  
Pins 11-17  
-12 Vdc  
12-25  
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Module I/O Specifications  
A15 Reference  
A15 Reference  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pins 3, 9, 13 and 17. Plug 3, pins 9, 13 and 17.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(2)  
J2(3)  
J2(4)  
90 mA  
60 mA  
400 mA  
Ground  
J3(3,6-8,10-12,14-16,18-19)  
J1(1-2,4-8,10-12,14-16,18-20)  
Inputs  
From Rear Panel  
EX_REF_IN J1(9)  
Frequency:  
1,2,5,10, or 13 MHz ±5 ppm to phase lock  
± 1 ppm for accurate global phase measurements.  
Nominal Impedance:  
Signal Level:  
50 Ω  
Between -2.5 dBm and +23 dBm  
Max DC voltage:  
±15 V  
From A14 Pulse Driver  
13M_OUT_LOCK J2(7)  
(PLL is locked)  
(PLL is unlocked)  
High Level:  
Low Level:  
To test, check for presence of 13 MHz out on BNC Rear Panel.  
12-26  
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Module I/O Specifications  
A15 Reference  
Hop Control  
To A33 Hop Controller  
J2(5,8,9)  
TTL  
Levels:  
Clock Rate:  
Amplitude  
≅ 180 kHz (bursts)  
+5 Vdc  
Outputs  
To Rear Panel  
EX_10M_REF_OUT J1(13)  
Waveshape:  
Harmonics:  
Sine  
<-25 dBc  
Signal Level:  
>+7.5 dBm  
<-110 dBc  
50 Ω  
Spurious at >5 kHz offsets:  
Nominal Output Impedance:  
To A26 Step Loop A  
1M_REF_A P3(4)  
Frequency:  
Levels:  
1 MHz ± 5 Hz  
See  
Figure 4-6 on  
page 12-28  
CMOS  
Duty Cycle:  
Amplitude  
Waveshape  
Duty Cycle  
800 ns high, 200 ns low  
+4 Vdc  
square wave (not a true square wave)  
80%  
To A17 Step Loop B  
1M_REF_B P3(1)  
Frequency:  
Levels:  
1 MHz ± 5 Hz  
See  
Figure 4-6 on  
page 12-28  
CMOS  
Duty Cycle:  
Amplitude  
Waveshape  
Duty Cycle  
800 ns high, 200 ns low  
+4 Vdc  
square wave (not a true square wave)  
80%  
12-27  
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Module I/O Specifications  
A15 Reference  
4.8 Vp-p  
800 ns  
200 ns  
Figure 4-6  
Typical Display  
To A14 Pulse Driver  
1M_REF_C J3(2)  
1 MHz ± 5 Hz  
CMOS  
Frequency:  
Levels:  
See Figure 4-7 on  
page 12-28  
Duty Cycle:  
Amplitude  
Waveshape  
Duty Cycle  
800 ns low, 200 ns high  
≅ 1 Vdc  
square wave (not a true square wave)  
20%  
5.0 Vp-p  
200 ns  
800 ns  
Figure 4-7  
Typical Display  
12-28  
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Module I/O Specifications  
A15 Reference  
To A18 Spectrum Analyzer  
SA_20M_REF J3(5)  
20 MHz ± 100 Hz  
Frequency:  
Waveshape:  
Sine  
Harmonics:  
<-25 dBc  
Subharmonics:  
Signal Level:  
Spurious at >5 kHz offsets:  
Amplitude  
<-30 dBc  
>+3 dBm (+10 dBm typical)  
<-70 dBc  
1 V  
rms  
2.8 Vp-p  
To A19 Measure Assembly (Readings same as SA_20M_REF)  
MEAS_20M_REF J3(13)  
20 MHz ± 100 Hz  
Frequency:  
Waveshape:  
Sine  
Harmonics:  
<-25 dBc  
<-30 dBc  
>+5 dBm  
<-70 dBc  
Subharmonics:  
Signal Level:  
Spurious at >5 kHz offsets:  
To A27 DAC Upconverter  
10M_REF_C J3(9)  
Frequency:  
10 MHz ± 50 Hz  
Sine  
Waveshape:  
Signal Level:  
Harmonics:  
>+10 dBm  
<-25 dBc  
<−70 dBc  
Spurious at >5 kHz offsets:  
Amplitude  
1.2 V  
rms  
3.75 Vp-p  
12-29  
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Module I/O Specifications  
A15 Reference  
To A5 Premodulation Filter and NSM  
10M_REF_B J3(17)  
Frequency:  
10 MHz ± 50 Hz  
Sine  
Waveshape:  
Signal Level:  
>+10 dBm  
<-25 dBc  
<-70 dBc  
Harmonics:  
Spurious at >5 kHz offsets:  
For measurement procedure and waveform, refer to "A5 Premodulation Filter and NSM",  
page 12-10.  
To A9 Global Test and Demod Assembly  
20M_REF_A J3(20)  
Frequency:  
20 MHz ± 20 Hz Requires 1 ppm reference in  
Waveshape:  
Sine  
Signal Level:  
>+5 dBm  
<−25 dBc  
<−30 dBc  
<−70 dBc  
Harmonics:  
Subharmonics:  
Spurious at >5 kHz offsets:  
Refer to "A9 Global Test and Demod", page 12-15, for measurement procedure and  
waveform.  
To A13 Output  
OUT_1G_REF J1(3)  
Frequency:  
1 GHz ± 5kHz  
Sine  
Waveshape:  
Signal Level:  
1 dBm ± 2 dB  
<−25 dBc  
<−60 dBc  
<−105 dBc  
Harmonics:  
Spurious at >5 kHz offsets 500 MHz to 1500 MHz:  
Phase Noise At 20 kHz offset:  
12-30  
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Module I/O Specifications  
A15 Reference  
OUT_1G_REF is only present for RF Generator settings up to 291 MHz. Used for  
frequency translation. Refer to "A13 Output", page 12-22, for readings.  
To A16 Receiver Assembly  
500M_REF J1(17)  
Frequency:  
500 MHz ± 2.5 kHz  
Sine  
Waveshape:  
Signal Level:  
0 dBm ± 2 dB  
<-25 dBc  
Harmonics:  
Spurious at >5 kHz offsets:  
Residual FM 0.3 to 3 kHz BW:  
Phase Noise At 20 kHz offset:  
Amplitude  
<−60 dBc  
<3 Hz  
<−110 dBc  
164 mV  
rms  
500 mVp-p  
To A19 Measurement Assembly, Voltmeter MUX  
1G_DIAG J2(1)  
Level if present:  
>0.20 V  
<0.10 V  
Level if not present or turned off:  
To A19 Measurement Assembly, Voltmeter MUX  
500M_DIAG J2(6)  
Level if present:  
Level if not present or turned off:  
0.20 V  
<0.10 V  
12-31  
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Module I/O Specifications  
A16 Receiver  
A16 Receiver  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pins 3, 7 and 13. Plug 3, pins 3, 9 and 13.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(2)  
J2(3)  
J2(4)  
380 mA  
80 mA  
100 mA  
Ground  
J1(1-2,4-6,8,10-12,15-20)  
J3(1-2,4-8,10-12,14-20)  
Inputs  
From A33 Hop Controller  
From A15 Reference  
Hop Control P(2,5,8)  
Levels:  
TTL  
Clock Rate:  
≅ 180 kHz (bursted)  
500M_REF P3(3)  
Freq:  
500 MHz ± 2.5 kHz  
Input Level:  
Spurs at >5 kHz offsets:  
Waveshape  
0 ± 2 dBm  
<−110 dBc  
sine  
Amplitude  
164 mV  
rms  
500 mVp-p  
From A11 Receiver Mixer  
RCVR_IN J1(3)  
Frequency:  
114.3 MHz or 614.3 MHz ± 5 MHz  
−14 dBm to −53 dBm  
Input Level:  
CAUTION  
Connection must be T’ed and measurement line must have DC blocking  
capacitor. Refer to "A11 Receiver Mixer", page 12-19, for full measurement  
procedure.  
12-32  
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Module I/O Specifications  
A16 Receiver  
Outputs  
To A9 Global Test and Demod  
UNMUTED_FM J1(14)  
20 µV/Hz  
100 kHz peak  
1.8 Vdc  
See Figure 4-8 on  
page 12-33  
Sensitivity into ≥ 100 k Ω load:  
Max Deviation:  
Amplitude  
Figure 4-8  
Typical Display  
To Front Panel  
PULSE_DEMOD J1(7)  
Level Pulse ON into open circuit:  
Level Pulse OFF:  
+2 V  
0 V  
Output Impedance:  
600 Ω  
<2.5 µs  
10-90% Rise/Fall time:  
To test Pulse Demod apply RF Carrier with AM modulation to RF Input, measure Pulse  
Demod Out on oscilloscope ≅ 180 mV x %MOD  
NOTE:  
Ensure correct settings on RF Analyzer page (frequency/amplitude). If the RF Input level  
is greater than 5 dBm below RF Analyzer setting, the measurement will not register.  
12-33  
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Module I/O Specifications  
A16 Receiver  
To Front Panel  
FM_DEMOD J1(13)  
Sensitivity into open circuit:  
Output Impedance:  
20 µV/Hz  
600 Ω  
Max Deviation:  
100 kHz peak  
± 5%  
Accuracy DC to 270 kHz:  
Sensitivity into oscilloscope  
325 µV/Hz  
To test FM Demod apply RF Carrier with FM modulation to RF Input, measure FM  
Demod on oscilloscope.  
NOTE:  
Ensure correct settings on RF Analyzer page (frequency/amplitude). If the RF Input level  
is greater than 5 dBm below RF Analyzer setting, the measurement will not register.  
To A3 Audio Analyzer  
DEMOD_AUD J2(6)  
Output impedance:  
Maximum Voltage Output:  
DC coupled AM  
Depth:  
<10 Ω  
12 Vp  
0 to 95%  
Sensitivity:  
0.01 V/% AM  
DC coupled FM  
Max Deviation:  
Sensitivity:  
100 kHz  
20 µV/Hz  
To A9 Global Test and Demod  
10.7M_IF J3(9)  
Freq:  
10.7 MHz ± 50 kHz  
+3 dBm ± 0.2 dB  
50 Ω  
Level:  
Output Impedance:  
Global Phase Error:  
< 0.8° RMS  
< 1.5° Peak  
< 1.5 Hz  
Global Freq Error:  
Harmonics:  
< −40 dBc  
Refer to "A9 Global Test and Demod", page 12-15, for measurement procedure.  
12-34  
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Module I/O Specifications  
A16 Receiver  
To A18 Spectrum Analyzer  
SA_114.3_M J3(13)  
114.3 MHz ± 5 MHz  
-20 dBm  
Frequency:  
Level  
To A19 Measurement Assembly Voltmeter MUX  
AUX7_VM J2(7)  
Voltage range: ± 5 V  
12-35  
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Module I/O Specifications  
A18 Spectrum Analyzer  
A18 Spectrum Analyzer  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pins 3 and 17. Plug 2, pin 17.  
Power Supplies  
+12 V  
-12 V  
+5 V  
J2(2)  
165 mA  
300 mA  
225 mA  
J2(3)  
J2(4)  
Ground  
J1(1,2,4-20) J3(1-16,18-20)  
Inputs  
From A16 Receiver (Needs Reference Input to obtain a reading)  
SA_114.3M P3(17)  
114.3 MHz ± 5 MHz  
Frequency:  
Max Ref Level -12 dBm (Corresponds to -23 dBm input at 8922 Aux RF In with  
20 dB RF attenuation and 20 dB Step Gain.) -20 dBm on  
Spectrum Analyzer with Reference signal connected, and  
expected input level set to same as reference signal on RF  
analyzer page  
Max second harmonic:  
.1 dB Compression:  
< -48 dBc  
> -12 dBm  
From A15 Reference  
SA_20MREF J1(3)  
Waveshape:  
Level:  
Sine  
> +3 dBm on spectrum analyzer = +10 dBm Typical  
Nominal input impedance: 50 Ω  
Amplitude  
1 V  
rms  
2.8 Vp-p  
12-36  
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Module I/O Specifications  
A18 Spectrum Analyzer  
From A19 Measurement Assembly  
SWP_STRT J1(6)  
CMOS  
Levels:  
High =  
Low =  
Sweep Start  
Sweep Stop  
CLK_REF_SA J2(8) Serial Bus  
E/I_SA J2(9) to/from A33  
DAT_REF_SA J2(5) Hop Controller  
Levels:  
TTL  
Clock Rate:  
≅ 80 kHz (bursts)  
Outputs  
To A19 Measurement Assembly  
SA_SCPT J1(7)  
Output Impedance:  
100 Ω  
1.532 V  
-12 dB  
100 kHz  
0 dB  
Detector Output (Max, Top of Screen):  
Input:  
Res BW:  
Step Gain:  
Variable Gain  
0 dB  
Sensitivity:  
17.6 mV/dB typical  
>80 dB  
Det Dynamic Range:  
Det Linearity (Uncal):  
Log Amp output with no RF applied:  
± 1.5 dB  
120 mV Typical  
12-37  
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Module I/O Specifications  
A19 Measurement  
A19 Measurement  
Use extender card 08920-60138.  
Power Supplies  
+5 V  
J1(15,16) J2(21,24)  
J2(26)  
420 mA  
120 mA  
120 mA  
< 1 mA  
0 mA  
+12 V  
-12 V  
+38 V  
J2(25)  
J3(17)  
+12 V Aux J2(28)  
12-38  
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Module I/O Specifications  
A19 Measurement  
Inputs  
Voltmeter Multiplexer  
+5 J2(24,21) J1(15,16)  
+12 J2(26) - FM Motherboard  
+38 J3(17) - FM Motherboard  
-12 J2(25)  
+12 AUX J2(28)  
IN_TEMP J3(4)  
IN_VOLT J3(5)  
DET_LO J3(7)  
DET_HI J3(6)  
AUD1_VM J3(8) - FM Audio Analyzer 1  
AUD2_VM J3(3) - FM Audio Analyzer 2  
RI_VM_ID J3(10)  
RI_VM J2(12)  
RSYN_DIAG J3(9)  
1G_DIAG J3(11) - From Reference Section A15  
500M_DIAG J3(13) - From Reference Section A15  
LFS1_VM J3(21) - FM SIG Source/Analyzer A6  
LFS2_VM J3(20) - FM SIG Source/Analyzer A6  
OUT1_DIAG J3(15) - FM Output Section A13  
PS_VM Internal  
CURRENT_SEN_VM J2(30)  
SGND Internal  
AUX1_VM J3(8) - From Step Loop A A26  
AUX2_VM J3(30) - From Step Loop B A17  
AUX3_VM J3(14) - From Sum Loop A25  
AUX4_VM J3(16) - From DAC/Up Convertor A27  
AUX5_VM J3(18) - FM Motherboard  
AUX6_VM J3(19) - FM Motherboard  
SCOPE_1 Internal  
SCOPE_2 Internal  
+VREF Internal  
-VREF Internal  
Input Z  
> 1 M Ω // 1000 pF  
± 5 V  
Full scale input  
DC Offset  
Vref (-)  
< 100 mV Uncalibrated  
5 V ± 3 mV Env (± .15 mV)  
-5V ± 3 mV Env (± .15 mV)  
± 0.125 mV/1000 hrs  
Vref (+)  
Vref Aging  
12-39  
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Module I/O Specifications  
A19 Measurement  
Scope Multiplexer  
PROC_AUD J3(24) - FM Audio Analyzer 2 A2  
SA_SCP J3(23) - From Spectrum Analyzer A18  
RI_SCP J3(26) - From Spectrum Analyzer A18  
AUX_SCP J3(21)  
DET_LO Internal  
DET_HI Internal  
GROUND Internal  
CALIBRATION REFERENCE Internal  
No Minimum Input  
Max Input  
10 V  
Input Z  
> 1 M Ω (No capacitance)  
< 100 mV Uncalibrated  
2 ± .10 V (Full 8 Bits)  
10 Mega Samples/S — in bursts  
10.0 V  
DC Offset  
AD Ref Voltage  
Sample Rate  
Max Input Voltage  
3 dB Bandwidth  
500 kHz  
12-40  
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Module I/O Specifications  
A19 Measurement  
Counter Inputs  
AUDIO1_CNT J1(6) - FM Audio Analyzer 1 A3  
RI_CNT J1(8)  
IN_CNT J1(5) - From Input Section A23  
IF_CNT J1(9) - From Global Board A9  
TIME BASE REF 20 MHz J3(29)  
MIXED_IF Internal  
STRIG Internal  
GND Internal  
20 MHz Time Base Standard  
The 20 MHz Sine wave drives a divide by 2 circuit  
which provides the 10 MHz reference for the counter.  
Input Impedance  
Input Level  
50 Ω  
> +5 dBm Sinewave  
< -25 dBc  
2nd Harmonics  
IN_CNT  
Input module prescaler count signal  
2.35 kΩ — .1 uF AC Coupling  
100 mV Peak  
Input Z  
Minimum input  
Freq Range  
10 kHz to 4 MHz  
IF_CNT  
Receiver Module I.F. Count  
2.35 kΩ — 100 pF AC Coupling  
100 mV Peak  
Input Z  
Minimum input  
Freq  
10.7 MHz  
AUD1_CNT  
RI_CNT  
HCMOS Vih > 4 V, Vil < 1 V  
HCMOS Vih > 4 V, Vil < 1 V  
25.6 µS x 216 = 1.6777216 S  
25.6 µS  
Maximum Count Time  
Minimum Count Time  
Count time step size  
Accuracy  
25.6 µS  
same as 10 MHz Ref  
< ± 10 nS 100 mV Input  
0.01 ppm/gate time  
Gate Time Jitter  
Resolution  
12-41  
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Module I/O Specifications  
A19 Measurement  
Trigger Input  
Scope Trigger Internal  
SIGN_SCP_TRIG J1(10)  
RI_SCP_TRIG J1(7)  
EXT_TRIG J1(4)  
INTERNAL TRIGGER Internal  
Trigger Logic  
SIGN_SCP_TRIG  
RI_SCP_TRIG  
EXT_TRIG  
HCMOS (Vih > 4 V, Vil < 1 V)  
HCMOS  
HCMOS  
Maximum Input  
± 15 V EXT_TRIG  
12-42  
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Module I/O Specifications  
A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only  
A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only  
NOTE:  
Applies to Mechanical Attenuator only.  
No extender card required.  
Power Supplies  
+12 V  
J6(9)  
215 mA  
15 mA  
190 mA  
206  
+5 V  
J6(12)  
-12 V  
J6(10)  
+12 V Aux  
J6(5)  
No relays  
With relays  
+ Prescaler  
20 mA  
220 mA  
360 mA  
460 mA  
J6 (11)  
43.5  
Inputs  
From Front Panel  
AUX RF INPUT J3  
Freq Range  
.4 to 1000 MHz  
Max Meas Level  
Trip Level  
.10 Watts (+20 dBm)  
+25 < Level < +28 dBm  
From A12 Pulse Attenuator  
SG IN J4  
Freq Range  
.4 to 1000 MHz  
To avoid removing bottom cover and motherboard covers, measure MAIN_RF_OUT on  
A13 output section.  
12-43  
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Module I/O Specifications  
A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only  
From Front Panel  
From Front Panel  
RF IN/OUT Output J1  
Freq Range  
.4 to 1000 MHz  
Outputs  
AUX RF OUT J2  
Freq Range  
.4 to 1000 MHz  
Relative path loss with respect to siggen input,thru path (0 dB).  
.4 MHz  
Loss < 1 dB  
Loss < 6 dB  
1000 MHz  
Relative path loss with respect to siggen input,atten 5 to 125 dB.  
.4 MHz  
Loss < 3 dB  
1000 MHz  
Loss < 10 dB  
To A19 Measurement Assembly  
DET LO J6(14)  
Meas Freq Range  
.4 to 1000 MHz  
Output level (Uncal)  
OFFSET VOUT (LOW)  
VOUT (LOW)  
100 mV +- 50 mV No input Power.  
280 mV +- 50 mV + OFFSET (+10 dBm, 50 MHz)  
.53 * V(LOW)  
VOUT (HIGH)  
12-44  
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Module I/O Specifications  
A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only  
To A11 Receiver Mixer  
1st_MIX_IN J5  
.4 to 1000 MHz  
Freq Range  
Output Level Normal  
Underrange  
−12 dBm to −22 dBm  
−22 dBm to −50 dBm  
Measure using known reference signal, refer to "A11 Receiver Mixer", page 12-19, for  
procedure.  
12-45  
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Module I/O Specifications  
A23 Input (HP/Agilent 8922A.B,E,F,G,H) Only  
To A19 Measurement Assembly  
IN_VOLT J6(15)  
AUTO_RNG_DET  
Output Level  
AUTO_RNG_ALC  
Range  
Prescaler AGC RF peak detector voltage.  
4.71 ± .5 V When AGC has active control.  
Prescaler AGC modulator control voltage.  
0 to + 4 V  
TEMP_DET  
Nominal Output  
Sensivitity  
Temperature sensor voltage.  
2.98 ± .1 Volts @ 25 Deg C  
10 mV / C  
DUPLEX_DET  
Nominal  
Duplex port RF peak detector Voltage.  
100 mV ± 20 mV @ +10 dBm  
400 mV ± 10 mV with relay closed.  
785 mV ± 10 mV with relay opened.  
Antenna port RF peak detector voltage.  
100 mV ± 20 mV @ +10 dBm  
400 mV ± 10 mV  
Trip Level  
ANT_DET  
Nominal  
Trip Level  
FILTER_OUT_DET  
Nominal  
Receiver Output Port RF peak det. Voltage.  
10 mV ± 5 mV @ -10 dBmOutput.  
RF Power peak detector high level voltage.  
See DET HI/LO specs (RF Power Detector).  
Input Section Analog Ground.  
± 10 mV  
DET_HIGH  
Output  
GND  
Nominal  
12-46  
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Module I/O Specifications  
A23 Input (Agilent 8922M/S Only)  
A23 Input (Agilent 8922M/S Only)  
NOTE:  
Applies to Electronic Attenuator only.  
No extender card required.  
Power Supplies  
+12 V  
+5 V  
J6(9)  
226 mA max  
15 mA  
J6(12)  
J6(10)  
J6(5)  
-12 V  
286 mA max  
360 mA max  
J6 (11)  
+12 V Aux  
43.5  
20 mA  
Inputs  
From Front Panel  
AUX RF INPUT J3  
Freq Range  
20 to 1000 MHz  
Max Meas Level  
Trip Level  
.10 Watts (+20 dBm)  
+25 < Level < +28 dBm  
From A12 Pulse Attenuator  
SG IN J4  
Freq Range  
20 to 1000 MHz  
To avoid removing bottom cover and motherboard covers, measure MAIN_RF_OUT on  
A13 output section.  
From Front Panel  
RF IN/OUT Output J1  
Freq Range  
20 to 1000 MHz  
12-47  
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Module I/O Specifications  
A23 Input (Agilent 8922M/S Only)  
Outputs  
From Front Panel  
AUX RF OUT J2  
20 to 1000 MHz  
Relative path loss with respect to siggen input,thru path (0 dB).  
Freq Range  
20 MHz  
Loss < 6 dB  
Loss < 8 dB  
1000 MHz  
Relative path loss with respect to siggen input,atten 5 to 125 dB.  
20 MHz  
Loss < 3 dB  
Loss < 3 dB  
1000 MHz  
To A19 Measurement Assembly  
DET LO J6(14)  
Meas Freq Range  
90 to 1000 MHz  
Output level (Uncal)  
OFFSET VOUT (LOW)  
VOUT (LOW)  
100 mV +- 50 mV No input Power.  
280 mV +- 50 mV + OFFSET (+10 dBm, 50 MHz)  
.53 * V(LOW)  
VOUT (HIGH)  
To A11 Receiver Mixer  
1st_MIX_IN J5  
20 to 1000 MHz  
Freq Range  
Output Level Normal  
Underrange  
−12 dBm to −22 dBm  
−22 dBm to −50 dBm  
Measure using known reference signal, refer to "A11 Receiver Mixer", page 12-19, for  
procedure.  
12-48  
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Module I/O Specifications  
A23 Input (Agilent 8922M/S Only)  
To A19 Measurement Assembly  
IN_VOLT J6(15)  
TEMP_DET  
Temperature sensor voltage.  
2.98 ± .1 Volts @ 25 Deg C  
10 mV / C  
Nominal Output  
Sensivitity  
DUPLEX_DET  
Nominal  
Duplex port RF peak detector Voltage.  
100 mV ± 20 mV @ +10 dBm  
785 mV ± 10 mV  
Trip Level  
ANT_DET  
Nominal  
Antenna port RF peak detector voltage.  
150 mV ± 50 mV @ +10 dBm  
400 mV ± 10 mV  
Trip Level  
FILTER_OUT_DET  
DET_HIGH  
Output  
Receiver Output Port RF peak det. Voltage.  
RF Power peak detector high level voltage.  
See DET HI/LO specs (RF Power Detector).  
Input Section Analog Ground.  
± 10 mV  
GND  
Nominal  
12-49  
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Module I/O Specifications  
A25 Sum Loop  
A25 Sum Loop  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pin 3. Plug 3, pins 3, 17.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(2)  
J2(3)  
J2(4)  
300 mA  
70 mA  
100 mA  
Ground  
J1(1-2,4-20)  
J3(1-2,4-16,18-20)  
Inputs  
From A27 DAC/Upconverter  
DAC_UP_OUT J3(3)  
Frequency:  
Level:  
13.4 MHz ± 50 kHz + Modulation  
0 dBm ± 3dB - measured on spectrum analyzer  
sine (no modulation)  
Waveshape  
Amplitude  
4 V  
rms  
≅ 12 Vp-p  
From A26 Step Loop A  
SUM_LP_PTUNE J2(7)  
Voltage  
-12 Vdc to +12 Vdc - measured on  
spectrum analyzer 0 ±3 dBm at  
RF Generator frequency  
12-50  
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Module I/O Specifications  
A25 Sum Loop  
From A26 Step Loop A  
STEP_LP_OUT/A J3(17)  
Frequency:  
486 - 1015 MHz  
100 kHz  
Resolution:  
Level:  
3 dB ± 3 dB - on spectrum  
analyzer  
Waveshape  
sine  
If difficulty is found measuring STEP_LP_OUT, set RF Generator to 250 MHz and use  
oscilloscope settings from list shown below.  
Channel 1  
= 200.0 mvolts/div  
= 500 ps/div  
Offset  
= -24.00 mvolts  
Trigger mode: Edge on negative  
edge on Chan2  
Timebase  
Ch. 1 Parameters  
Delay  
= 0.0000 s  
= 1.1 volts  
= 620 ps  
Trigger Levels  
P-P Volts  
Fall Time  
Period  
Chan1  
Holdoff  
= -24.00 mvolts  
= 70.000 ns  
Rise Time  
Frequency  
+ Width  
= 590 ps  
= 483.092 MHz  
= 1.060 ns  
= 2.070 ns  
= 1.010 ns  
= 12.50 mvolts  
- Width  
Preshoot  
Overshoot  
RMS Volts  
= 0.0000 mvolts  
= 1.617 volts  
Duty Cycle = 51.20%  
Outputs  
To A26 Step Loop A  
SUM_LOCK J2(1)  
Level:  
High  
Low  
TTL (High = Out of Lock)  
Typically + 7 Vdc  
Typically < 0.3 Vdc  
To A19 Measurement Board  
AUX3_VM J2(6)  
Level:  
-5 V to +5  
12-51  
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Module I/O Specifications  
A25 Sum Loop  
To A13 Output  
SGS_500_1000M J1(3)  
Frequency:  
500 to 1015 MHz  
0 dBm ± 2 dB  
< -20 dBc  
Level:  
Harmonics:  
Spurious >5 kHz offset:  
< -60 dBc  
Change frequency on RF Generator page. Select modulation types on or off. On spectrum  
analyzer, GMSK Modulation can be seen between centre frequency and first harmonics by  
level of increased noise floor.  
12-52  
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Module I/O Specifications  
A17, A26 Step Loop  
A17, A26 Step Loop  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pin 3. Plug 3, pin 3.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(2)  
J2(3)  
J2(4)  
250 mA  
100 mA  
450 mA  
Ground  
J1(1-2,4-20)  
J3(1-2,4-20)  
Inputs  
From A15 Reference  
1M_REF_A/B P3(3)  
Frequency:  
Level:  
1 MHz ± 5 Hz  
CMOS  
For measurement procedure refer to "A15 Reference", page 12-26.  
From A25 Sum Loop for A26 (Step Loop A) only  
SUM_LOCK J2(1)  
Level:  
High  
Low  
TTL (High = Out of Lock)  
Typically + 7 Vdc  
Typically < 0.3 Vdc  
12-53  
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Module I/O Specifications  
A17, A26 Step Loop  
From A33 Hop Controller  
Hop Control J2(5,8,9)  
Levels: TTL  
1 MHz (bursted)  
Clock Rate:  
Levels  
Pin 5 5 Vdc  
Pin 8 -1.25 Vdc  
Pin 9 0 Vdc  
Outputs  
To A25 Sum Loop Assembly  
SUM_LP_PTUNE J2(7)  
Level:  
-12 Vdc to +12 Vdc  
See "A25 Sum Loop", page 12-50, for measurement procedure.  
To A25 Sum Loop (A26 Step Loop A), To A11 Receiver Mixer (A17 Step Loop B)  
STEP_LP_OUT J1(3)  
Frequency:  
Resolution:  
Level:  
486 - 1015 MHz  
100 kHz  
3 dB ± 3 dB  
< -20 dBc  
< -60 dBc  
sine  
Harmonics:  
Spurs (>5 kHz offsets):  
Waveshape  
Levels  
350 V  
rms  
1 Vp-p  
Step Loop B(A17) To achieve lowest frequency from available range (to compensate for  
digital oscilloscope frequency range to measure higher RF frequencies), select 380.8 MHz  
from RF analyzer page (This uses 495.1 MHz from step loop and 114.3 MHz IF).  
Step Loop A(A26) Levels same as Step Loop B, except for set frequency on RF Generator  
page. To obtain lowest frequency at step loop A, output set to 249.1 MHz.  
12-54  
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Module I/O Specifications  
A17, A26 Step Loop  
To A19 Measurement Board  
AUX1/2_VM J2(6)  
Voltage Range:  
-5 V to +5 V - typically +5 Vdc  
for default/Preset settings  
12-55  
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Module I/O Specifications  
A27 DAC/Upconverter  
A27 DAC/Upconverter  
Use extender card 08922-60129.  
Use coax jumpers on Plug 1, pins 7, 9 and 13. Plug 3, pin 15.  
Power Supplies  
+15 V  
-15 V  
+5 V  
J2(2)  
J2(3)  
J2(4)  
J2(1)  
20 mA  
50 mA  
25 mA  
150 mA  
-5 V  
Ground  
J1(1,3,4,17,18,20)  
J3(1-4,6-14,16-20)  
Inputs  
From A5 Premod Filter and NSM  
NSM_IF_CLK J1(2)  
17.3333 MHz ± 250 Hz  
TTL  
Frequency:  
Level:  
See "A5 Premodulation Filter and NSM", page 12-10, for measurement procedure.  
NSM_IF_DATA J1(5-16)  
Level:  
TTL  
The NSM_IF_DATA can be probed on SMC connectors Plug 1 (pins 7, 9 and 13). The  
NSM Data Stream is difficult to measure on a digital oscilloscope.  
The Table shown are typical settings for an oscilloscope. To obtain a reading the display  
persistance must be increased. Typically 1 bit of the data stream will be ≅60 ns.  
12-56  
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Module I/O Specifications  
A27 DAC/Upconverter  
Channel 2  
Timebase  
= 500.0 mvolts/div  
= 50.0 ps/div  
Offset  
Delay  
= 1.450 volts  
= 0.0000 s  
Trigger mode: Edge on negative  
edge on Chan2  
Trigger Levels  
Chan1  
Holdoff  
= 1.450 volts  
= 70.000 ns  
Delta T  
Start  
= 1.880 ps  
= -248.380 ns  
= 2.470 volts  
= 420.0 mvolts  
Stop  
= -246.500 ns  
= 2.890 volts  
Delta V  
Vmarker1  
Vmarker2  
From A15 Reference  
10 MHz Ref C J1(19)  
Waveshape:  
Sine  
Level:  
>10 dBm  
< -25 dBc  
10 MHz  
Harmonics:  
Frequency:  
See "A15 Reference", page 12-26, for measurement procedure.  
Outputs  
To A19 Measurement Board  
AUX4-VM J2(6)  
13.4 MHz present level:  
0.3 to 0.5 Vdc into 1M Ω  
-0.3 to -0.5 Vdc into 1M Ω  
13.4 MHz not present level:  
To A25 Sum Loop A  
DAC_UP_OUT J3(15)  
Frequency:  
13.4 MHz ± 50 kHz + Modulation  
Resolution:  
Level:  
1 Hz  
0 dBm ± 3 dB  
< -30 dBc  
< -60 dBc  
Harmonics:  
Spurs >5 kHz offsets:  
See "A25 Sum Loop", page 12-50, for measurement procedure.  
12-57  
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Module I/O Specifications  
A28 Power Supply  
A28 Power Supply  
This spec is for the complete assembly which includes the transformer and plug-in boards.  
Input  
Nominal Line Voltages:  
Tolerance:  
100, 120, 22, 240  
+7%, -14%  
Frequency Range:  
48 to 440 Hz  
❒ Overvoltage protected.  
❒ +21 Volts and +25 Volt supplies always on, all other supplies controlled with front  
panel power switch.  
❒ Short circuit protected.  
❒ Thermal shutdown capability.  
❒ Two supply short protection (shorting +25 unregulated is protected only by fuse).  
❒ Fan turns off with power down.  
❒ Fan speed is a function of temperature.  
Outputs  
Supply  
Voltage  
Tolerance limit  
incl. load  
Line Rel.  
Ripple RMS  
Max CW  
Total noise 20 Noise nV/√Hz  
a
Hz-20 MHz  
@20 kHz  
Spur RMS  
+38 V  
+15 V  
-15 V  
1%  
1%  
1%  
1%  
4%  
.3A  
.1 mV  
1 µV  
1 µV  
1 µV  
1 µV  
1 µV  
1 µV  
1V  
1mV  
400  
150  
150  
50  
4.2 A .1 mV  
2.6 A .1 mV  
12.8 A .1 mV  
3.0 A .1 mV  
2.0 A .1 mV  
+60% 3A fuse  
.3 mV  
.3 mV  
.1 mV  
.1 mV  
.2 mV  
10 µV  
+5.2 V  
-5/2 V  
50  
+12 Aux V 1%  
100  
+25 Unreg -10%  
+21 V  
1%  
1 A  
Three terminal regulator  
a. This is the spec for rates greater than 60 kHz. For rates less then 60 kHz the spec increases  
by 6 dB per octave until we reach a maximim of 100 µV at rates less than 600 Hz.  
12-58  
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Module I/O Specifications  
A33 Hop Controller  
A33 Hop Controller  
Power Supplies  
+15 V  
-15 V  
+5 V  
J21(100)  
< 5 mA  
J21(40,59,60,61,91,92)  
J21(99)J2(1)  
0 mA (not used)  
< 1 A  
Ground  
J21(17,18,42,43,56,69,87,93,94)  
Inputs  
Hop Control Input Bus  
HOP_ADDR J21(5-15)  
Amplitude:  
TTL levels  
100 µA  
-1 mA  
High drive requirement:  
Low drive requirement:  
Format:  
unsigned binary, high = 1  
From Rear Panel  
TX_HOP J21(4)  
Amplitude:  
TTL levels  
100 µA  
High drive requirement:  
Low drive requirement:  
Triggered by:  
-2 mA  
Rising edge  
12-59  
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Module I/O Specifications  
A33 Hop Controller  
From Rear Panel  
RX_HOP J21(3)  
Amplitude:  
TTL levels  
100 µA  
High drive requirement:  
Low drive requirement:  
Triggered by:  
-2 mA  
Rising edge  
From Rear Panel  
SEQ_HOP J21(2)  
TTL levels  
Amplitude:  
High drive requirement:  
Low drive requirement:  
Triggered by:  
100 µA  
-2 mA  
Rising edge  
From Rear Panel  
SEQ_HOP_RESET J21(1)  
Amplitude:  
TTL levels  
100 µA  
-2 mA  
High drive requirement:  
Low drive requirement:  
Active Level:  
Low  
RESET_SELECT J21(19)  
Amplitude:  
TTL levels  
High drive requirement: 100 µA  
Low drive requirement: -1 mA  
Format:  
high = reset to zero  
low = reset to table location specified by the HOP_ADDRESS  
12-60  
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Module I/O Specifications  
A33 Hop Controller  
Front Panel Input  
PULSE_MOD_IN J21(68)  
≅ 25 µS  
ON latency:  
OFF latency:  
Amplitude:  
≅ 10 µS  
TTL levels  
High:  
No attenuation of sig gen output  
Low:  
Attenuate sig gen output  
100 µA  
High drive requirement:  
Low drive requirement:  
-1 mA  
Host Processor Interface  
GADDR  
GDATA  
GLDS  
J21(57,58,62-66,80,81,78,79)  
J21(83-86,88-90,95)  
J21(76)  
J21(77)  
J21(97)  
G-R/W  
IO_INT  
Outputs  
SEQ_TRIG_OUT J21(21)  
Amplitude: TTL levels  
EA60_SW0/2 J21(71,72,73)  
Amplitude: TTL levels  
12-61  
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Module I/O Specifications  
A33 Hop Controller  
Fast Hop Busses I/O  
Clock, Data, and Enable  
INPUT SECTION J21(40,46,44)  
STEP LOOP/A J21(29,27,30)  
STEP LOOP/B J21(37,35,36)  
PREMOD FILTER & NSM  
J21(25,23,26)  
Amplitude:  
Clock Rate:  
TTL Levels  
1 MHz (bursted)  
Slow Busses  
Clock, Data, and Enable  
RECEIVER J21(41,39,34)  
OUTPUT SECTION J21(41,39,28) (Clock and data shared with Rcvr)  
REFERENCE SECTION J21(31,33,32)  
SPECTRUM ANALYZER J21(31,33,38) (Clk & data shared with ref)  
MODULATION DISTRIBUTION J21(53,54,52)  
AUDIO 1 J21(53,54,49)  
AUDIO 2 J21(53,54,50)  
INPUT SECTION J21(53,54,51)  
(Clk & data shared between MOD, AUD1,AUD2, INPUT2)  
Amplitude:  
TTL Levels  
Clock Rate:  
Approximately 180 kHz (bursted)  
12-62  
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13  
Instrument Block Diagrams  
13-1  
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Instrument Block Diagrams  
Introduction  
Introduction  
This chapter contains the block diagrams for the HP/Agilent 8922A/B/E/F/G/H/M/S.  
Additional information for troubleshooting to the block diagram level can be found in the  
following chapters.  
Chapter 4, Using the Service Kit, explains how to use the HP/Agilent 83210A Service Kit  
to extend the modules and make signal measurements.  
Chapter 5, Troubleshooting the Controller/Display, gives procedures for troubleshooting  
display problems or problems with the HP/Agilent 8922 Controllers.  
Chapter 6, Troubleshooting the Power Supply, contains information about the power  
supply and regulator circuits as well as test points and power distribution.  
Chapter 12, Module I/O Specs, contains detailed descriptions of the input and output  
signal characteristics for most RF and Audio modules.  
Chapter 14, Block Diagram Theory, has a detailed technical discussion of the function of  
each assembly in the block diagrams.  
Reading the Pin Numbers  
The signal names and pin numbers are shown on the diagrams, the pin numbers are  
numbered according to the plug number found on the module, the jack number found on  
the mother board, and the pin number.  
For example: P2/J23(14)  
P2 indicates that the signal is found on the module at Plug 2.  
J23 indicates the signal is found on the mother board on Jack 23.  
(14) indicates that pin number 14 (On plug 2 and Jack 23) carries the signal.  
Block Diagram 1  
Block Diagram 1 contains the RF and Audio Analyzer circuits in the HP/Agilent 8922.  
These are the primary circuits used to make measurements. The Spectrum Analyzer is an  
option in the HP/Agilent 8922F/H/M/S. The 14 dB input attenuator is replaced with an 8  
dB attenuator in the HP/Agilent 8922F/H/M/S.  
Block Diagram 2  
Block Diagram 2 contains the RF and Audio Generator circuits. This block diagram  
contains the generator hardware that is common to all three models of HP/Agilent 8922.  
13-2  
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Instrument Block Diagrams  
Introduction  
Block Diagram 3  
Block Diagram 3 contains circuits found only in the HP/Agilent 8922B. These circuits are  
used with the RF Generator circuits (BD2) to generate GSM signals. These circuits can  
only be controlled with the rear-panel GPIO connector on the HP/Agilent 8922B.  
Block Diagram 4  
Block Diagram 4 illustrates the modules that are primarily digital and are used to generate  
the digital information and control signals required to set up a call with a GSM mobile  
radio. These are not found in the the HP/Agilent 8922A or B.  
Block Diagram 5  
Block Diagram 5 is an overall block diagram. It illustrates the interconnecting control  
signals and busses between the modules. This block diagram also shows detailed pin  
labels for the A19 Measurement board and A33 Hop Controller. The A19 board measures  
voltages and frequencies from most of the analog modules. It is the primary tool used for  
the internal diagnostic measurements and many other measurements. The A33 Hop  
Controller contains the circuits that communicate with the analog analyzer and generator  
modules.  
13-3  
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Instrument Block Diagrams  
Introduction  
This Page Intentionally Left Blank  
13-4  
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14  
Block Diagram Theory of Operation  
14-1  
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Block Diagram Theory of Operation  
Introduction  
Introduction  
The HP/Agilent 8922 is a specialized instrument designed to test GSM and PCN mobile  
radios and base station transmitters. The HP/Agilent 8922A contains the analog audio and  
RF hardware necessary to generate 0.3 Gaussian Minimum Shift Key (GMSK) signals.  
Digital hardware has been added to the HP/Agilent 8922B to allow it to buffer digital data  
from a computer and properly format it for the GSM protocol. The HP/Agilent 8922E/F/  
G/H/M/S adds complete digital control and allows it to test a mobile radio by simulating a  
calibrated base station. For more information on the capabilities of the HP/Agilent 8922  
family of test sets, refer to the appropriate technical data sheets.  
The complexity of the HP/Agilent 8922 circuits combined with the convenient modular  
architecture, allows the HP/Agilent 8922 to be repaired more quickly and economically  
with Assembly Level Repair (ALR). This is the recommended repair strategy, and this  
manual is focused to support this type of repair. The block diagram discussion provides  
sufficient technical detail to understand the overall hardware of the HP/Agilent 8922 and  
allows in-depth troubleshooting to isolate failures to a single assembly.  
The primary troubleshooting method for the HP/Agilent 8922 is to use the memory card  
diagnostics supplied with this manual. This section is important reading for anyone trying  
to understand the overall hardware of the HP/Agilent 8922, and should be used as a  
tutorial or when the diagnostics cannot correctly locate a faulty assembly.  
14-2  
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Block Diagram Theory of Operation  
Technical Discussion  
Technical Discussion  
The HP/Agilent 8922 can be divided into two instruments, a signal generator and a signal  
analyzer. This discussion is intended to follow the block diagrams in chapter 13. The  
assemblies in Block Diagrams 1 and 2 are covered first. These are the primary assemblies  
where it is possible to do assembly level measurement and troubleshooting. All the  
hardware in Block Diagrams 1 and 2 are common to all HP/Agilent 8922 instruments.  
Block Diagrams 3 and 4 illustrate hardware that is unique to the HP/Agilent 8922B and  
HP/Agilent 8922E/F/G/H respectively. Because these modules are primarily digital, the  
discussion on this hardware is limited to a high level functional description. Often  
troubleshooting these boards is difficult at the module level without sophisticated logic or  
signature analysis. Module swap is the fastest way to troubleshoot hardware problems for  
these assemblies. The final discussion focuses on the modules in Block Diagram 5. More  
information about troubleshooting display and controller problems is also included in  
chapter 5.  
When important, the input and output specifications for most assemblies are tabulated in  
chapter 12, Module I/O Specs. For additional details on the exact signal levels and  
frequencies for assembly inputs and outputs, refer to chapter 12, Module I/O Specs.  
14-3  
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Block Diagram Theory of Operation  
Block Diagram 1  
Block Diagram 1  
RF Analyzer  
Audio Analyzer  
Spectrum Analyzer  
A23 Input  
A24 High Power Attenuator  
The A23 Input assembly is both the input for the RF Analyzer section and the final output  
from the RF Generator section. Additional information on how the A23 Input assembly is  
used in the signal generator is covered in the Block Diagram 2 discussion.  
The RF input signal is input to the HP/Agilent 8922 using either the RF IN/OUT  
connector (for high power applications > 20 dBm) or using the AUX RF IN connector for  
lower power input signals. The input signal on the front panel RF IN/OUT connector is  
first sent to the A24 High Power Attenuator. This attenuates the signal by approximately  
14 dB (8 dB on the HP/Agilent 8922F,H,M,S) where it can be directly used by the A23  
Input assembly.  
The A23 Input assembly has an RF power detector that converts the power on the RF IN/  
OUT connector to a dc voltage. This dc signal is sent to the A19 Measurement assembly  
where it is measured. These dc signals are sent to the A19 Measurement assembly using  
the det_lo and det_hi inputs to the A19 Measurement assembly. The det_lo signal is lower  
sensitivity (for the highest power signals) and det_hi is high sensitivity (for lower power  
signals). Accurate RF power measurement can only be made using the RF IN/OUT  
connector on the HP/Agilent 8922. These circuits are used to measure both CW and  
Pulsed RF power. For accurate RF power measurements it is necessary to zero the power  
meter and enter the frequency of the RF input signal. These two functions will cause the  
power meter to use the proper correction factors to compensate for temperature changes  
and frequency losses.  
After the power detector, the RF IN/OUT connector is routed to a power splitter and then  
an RF switch. This switch selects between the RF IN/OUT signal or the AUX RF IN  
signal.  
Selectable input attenuators in the A23 Input assembly are switched in and out, manually  
or automatically. This keeps the input level within a range that works best for the mixers,  
IF amplifiers, and detector in the remainder of the HP/Agilent 8922. Filters are  
automatically switched in to remove images and other interfering signals. The frequency  
ranges of the 4 different filters are shown on Block Diagram 1.  
The A23 Input assembly contains a voltage multiplexer (mux) to route internal diagnostic  
voltages to the A19 Measurement assembly. Diagnostics individually check that all the  
input attenuator switches provide attenuation, although the accuracy of this measurement  
14-4  
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Block Diagram Theory of Operation  
Block Diagram 1  
is limited. The diagnostics also verify the input filters and a connectivity check is provided  
to verify the connections going into and out of the A23 Input assembly. This section is a  
likely cause of power measurement problems, especially if the diagnostics pass indicating  
that the measurement board is responding correctly.  
A17 StepLoop B  
This assembly creates RF reference signals from 500 to 1000 MHz. These signals are  
derived from a 1 MHz output from the A15 Reference section assembly and digital inputs  
from the A33 Hop Controller assembly. The HP/Agilent 8922 has the ability to change RF  
frequencies very quickly; to “frequency Hop”. This is necessary because the radios and  
base stations change frequencies and the HP/Agilent 8922 must be able to change along  
with them. The A33 Hop Controller assembly controls which frequency the A17 Step  
Loop assembly will create. Most radio and base station testing is done at carrier  
frequencies near 900 MHz. For these frequencies, A17 STEP LOOP B is approximately  
114.3 MHz lower than the RF input signal that was entered. Unlike some RF analyzers,  
the HP/Agilent 8922 cannot automatically “tune” to the RF input signal. This information  
must be entered for the 8922 to set up the proper filters and LO frequencies.  
A26 Step Loop A assembly and A17 Step Loop B assembly have exactly the same  
hardware and can be interchanged if necessary. IMPORTANT: The A25 Sum Loop  
assembly is adjusted to match the Step Loop A assembly. If either the A25 Sum Loop or  
A26 Step Loop A assembly is changed, it is necessary to readjust the A25 Sum Loop  
assembly using the instructions in chapter 7 section of this manual.  
Early versions of the HP/Agilent 8922 provided the A17 Step Loop B assembly output to  
the rear panel, which was then normally routed back into the instrument using an external  
coax cable. Newer instruments now route the signal directly from the A17 Step Loop B  
assembly to the A11 Receiver Mixer assembly.  
The diagnostic procedures check the A17 Step Loop B assembly at various frequencies  
but can only verify operation during static (non-hopped) operations. If the instrument  
meets its specifications during static operation but fails during frequency hopping, it may  
be that the A17 Step Loop B assembly is slow to lock-up to the correct new frequency. The  
error would appear as a high phase or frequency error at the beginning of the frequency  
hop.  
A11 Receiver Mixer  
This modules mixes the input signal from the A23 Input assembly with the LO signal from  
the A17 Step Loop B assembly (or rear panel signal on early versions). The sum or  
difference signal will always be within ± 50 kHz of 114.3 MHz or 614.3 MHz. This signal  
is then filtered by the A11 Receiver Mixer assembly and passed onto the receiver section.  
The control voltage to select the filter is provided by the A16 Receiver assembly. This  
control voltage is fed into the A11 Receiver Mixer assembly (as a dc voltage) on the same  
cable that is used for the RF output to the A16 Receiver assembly.  
14-5  
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Block Diagram Theory of Operation  
Block Diagram 1  
To measure this signal it is necessary to “tee” the connection so that the dc control voltage  
is always available to the A11 Receiver Mixer assembly from the A16 Receiver assembly.  
It is then possible to measure the dc voltages with an external voltmeter or using a  
blocking capacitor, a spectrum analyzer can be connected to view the RF signal from the  
mixer. Failure to use a blocking capacitor will cause the switch in the A11 Receiver Mixer  
assembly to be indeterminate and accurate measurements cannot be made. Although the  
A11 Receiver Mixer assembly does not contain any diagnostic test points, it is used  
extensively during diagnostics to route RF test signals into the A16 Receiver and A18  
Spectrum Analyzer assemblies.  
A16 Receiver  
The A16 Receiver assembly input signal from the A11 Receiver Mixer assembly is either  
114.3 MHz or 614.3 MHz. If the signal is 614.3 MHz it is immediately downconverted to  
an IF of 114.3 MHz by a 500 MHz reference signal from A15 Reference assembly.  
This signal at 114.3 MHz is then filtered and split. It is routed to the A18 Spectrum  
Analyzer assembly and to another mixer where it is further downconverted for  
demodulation. The LO for the next downconversion is 125 MHz which is derived from the  
same 500 MHz reference signal that was used earlier. The signal is now at 10.7 MHz ± 50  
kHz. This signal is a duplicate of the input signal except the frequency has been translated.  
It still contains the pulse and modulation information. The primary signal path for this  
signal is to the A9 Global Test and Demod assembly where frequency and phase accuracy  
are measured.  
The 10.7 MHz signal also drives an FM discriminator and pulse detector that demodulate  
the signal. The demodulated waveforms are then routed to the front panel, A3 Audio  
Analyzer 1 assembly, or A9 Global Test and Demod assembly depending on the switch  
settings. These connections are detailed in Block Diagram 1.  
The A16 Receiver assembly has extensive diagnostics which test the internal filters,  
switches, and demodulators. The most critical signals from the A16 Receiver assembly are  
the 114.3 MHz signal for the A18 Spectrum Analyzer assembly and the 10.7 MHz to the  
A9 Global Test and Demod assembly. The signal to the A9 Global Test and Demod  
assembly should be near +3 dBm for good signal to noise ratio (and no compression) in  
the A9 Global Test and Demod assembly.  
A9 Global Test and Demod  
The first function of the A9 Global Test and Demod assembly is to downconvert the 10.7  
MHz signal from the receiver to 700 kHz ± 50 kHz. This signal is then routed to a counter  
on the A19 Measurement assembly. The frequency of this signal is measured and is used  
to calculate the RF input signal frequency. Measuring an RF input signal frequency is a  
good method of determining if the frequency translation hardware up to the A9 Global  
Test and Demod assembly is functioning properly.  
14-6  
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Block Diagram Theory of Operation  
Block Diagram 1  
The primary measurements of the A9 Global Test and Demod assembly are phase,  
frequency, and amplitude information of the 0.3 GMSK modulation signals. The A9  
Global Test and Demod assembly measures these by digitizing the 700 kHz IF signal and  
using high speed DSP hardware and algorithms. The DSP hardware must be “armed” and  
then “triggered” to synchronize with the incoming modulation signal. These various  
trigger signals are shown on Block Diagram 1 and the operation of these is described in  
the HP/Agilent 8922 Users Guide.  
The results of these measurements are displayed using the DSP ANL screen on the HP/  
Agilent 8922. The digital data information is also used by the HP/Agilent 8922E/F/G/H to  
setup and maintain a call with a GSM mobile phone. This is done in “real time” as the HP/  
Agilent 8922E/F/G/H and mobile phone simultaneously send and receive from each other.  
A18 Spectrum Aanalyzer  
The A18 Spectrum Analyzer assembly receives the 114.3 MHz signal from the A16  
Receiver assembly. The analyzer can only view frequency spans up to 4 MHz due to the  
bandwidth of this input signal. A phase lock loop inside the spectrum analyzer is used to  
downconvert the 114.3 MHz signal which is then amplified, filtered, and detected. The  
synchronization signal for the display is controlled by the A19 Measurement assembly.  
This causes the PLL signal to sweep across the frequency span selected. In addition to  
normal spectrum analysis, the HP 8922 spectrum analyzer is used to help measure the  
amplitude profile of the pulsed GSM signal. The upper 30 dB of the pulse envelope is  
accurately determined by the A9 Global Test and Demod assembly, however, the lower  
level portions of the pulse amplitude is measured with the wide dynamic range of the A18  
Spectrum Analyzer assembly.  
This internal spectrum analyzer is a useful tool to view the incoming RF signal and verify  
that the A23 Input and A11 Receiver Mixer assemblies are working correctly. The A18  
Spectrum Analyzer assembly contains diagnostic test points to verify gain, attenuation,  
and bandwidth controls. Because of the wide dynamic range of the A18 Spectrum  
Analyzer assembly it is used by the diagnostics to measure pulse on/off ratio of the A12  
Pulse Attenuator assembly.  
A2 Audio Analyzer 2 A3 Audio Analyzer 1  
These modules are leveraged from an earlier product, the HP/Agilent 8920A, which is  
primarily an analog communications test set. Many of the audio circuits in these  
assemblies are not used by the HP/Agilent 8922 and will not be covered in this discussion.  
Refer to the HP/Agilent 8920A Assembly Level Repair manual if further detail on these  
modules is required.  
For the HP/Agilent 8922, the primary function of these assemblies is to provide the  
oscilloscope functions. The HP/Agilent 8922 contains no specialized oscilloscope  
module, only these two analyzer assemblies and the A19 Measurement assembly. These  
14-7  
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Block Diagram Theory of Operation  
Block Diagram 1  
two analyzer modules provide gain, attenuation, and distribution functions of the audio  
signals. The A19 Measurement assembly does the actual voltage measurement. The  
interconnection of these modules is shown on Block Diagram 1.  
The diagnostics for these modules are extensive. Like the hardware, the diagnostics have  
been leveraged from the HP/Agilent 8920A and test more of the circuits than are actually  
used in the HP/Agilent 8922. The diagnostic output from these modules documents the  
exact circuits in the modules which are tested.  
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Block Diagram Theory of Operation  
Block Diagram 2  
Block Diagram 2  
RF Generator  
AF Generator  
A15 Reference  
The A15 Reference assembly contains the circuits necessary to generate reference signals  
for the other assemblies in the HP/Agilent 8922. The A15 Reference assembly can be  
locked to an external signal of 1, 2, 5, 10 or 13 MHz or can operate without an external  
reference by using its own 10 MHz TCXO.  
An optional high stability oscillator (Option 001) is available for the HP/Agilent 8922 that  
provides a more accurate and stable reference. The output from this oscillator is routed to  
the rear panel, where it must be connected to the Reference Input for the HP/Agilent 8922  
to lock onto this signal. The frequency of the (optional) high stability timebase is adjusted  
with a screwdriver while the (standard) internal Temperature-Compensated Crystal  
Oscillator (TCXO) is adjusted by setting internal DAC values. Both of these adjustments  
are thoroughly explained in chapter 7, Adjustments and Calibration.  
If the A15 Reference assembly is replaced, an error message “Frequency Reference  
Calibration Lost” will be seen during instrument power-up. It is necessary to perform the  
adjustment for the internal TCXO to remove the error message and restore calibrated  
operation.  
A special feature of the A15 Reference assembly is the ability to offset all reference  
signals in the HP/Agilent 8922. The amount of offset can be set by the user by changing  
the A15 Reference assembly DAC value. The primary screen to control operation of the  
A15 Reference assembly is the Configure Screen; refer to the Users Guide for a more  
complete discussion on the operation of the Reference section.  
Diagnostic procedures for the A15 Reference assembly check lock detectors to make sure  
that the internal loops are locked, and level detectors to check if RF power is available on  
key reference signals. The diagnostics cannot check the frequency accuracy of the internal  
oscillators.  
A5 Premod Filter and NSM  
The A5 Premod Filter and NSM assembly contains the necessary circuits to convert the  
user’s digital input data and clock signals into a GMSK waveform. The inputs to the  
module are a very accurate 270.833 kHz clock signal and digital TTL level data. On the  
HP/Agilent 8922A these two signals are provided directly by the user at the front panel;  
on the other HP/Agilent 8922’s, these signals are generated by other assemblies.  
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Block Diagram Theory of Operation  
Block Diagram 2  
Compared to common modulation formats like AM, FM, and phase modulation, the 0.3  
GMSK format is more complex and requires special equipment (like the HP/Agilent  
8922) to generate and analyze signals. A brief explanation is included here as an overview  
of the format of 0.3 GMSK.  
The 0.3 GMSK format was chosen because it is very efficient in terms of the amount of  
information that can be transmitted in a given amount of frequency spectrum. To  
understand 0.3 GMSK, it is necessary to first understand MSK (Minimum Shift Keying).  
MSK is phase modulation where the carrier is shifted + or - 90 degrees as each data bit is  
received. This instantaneous phase shift causes “splatter” in the frequency domain and  
appears as noise spikes on a spectrum analyzer. This is not a good system for digital  
communications because it would cause noise in adjacent communication channels. To  
eliminate this noise, the digital signals are first low-pass filtered to eliminate the  
instantaneous phase shifts. The filter cut-off frequency chosen was 0.3 times the data rate  
270.833 kHz = 81.25 kHz. The shape of the filter chosen was Gaussian, which explains  
where the “G” in “0.3 GMSK” was derived. The effect of the 0.3 Gaussian filter is to  
smooth out the sharp digital transitions and causes a more continuous phase modulation  
that has low spectral splatter.  
To further reduce the frequency splattering in the frequency spectrum, the digital input  
data is “Differentially Encoded”. This means that the modulation (either + or - 90 degrees)  
is determined by examining the current data input (1 or 0) and deciding if it is the same or  
different than the previous data bit. If the current data bit is different than the previous bit,  
the carrier is modulated -90 degrees; if the current data is the same as the previous bit, the  
carrier is modulated +90 degrees. For example, a series of data…01010101.…, would  
cause the carrier to be continuously modulated -90 degrees each clock period. Similarly, a  
series of all 1’s or all 0’s would cause the carrier to be continuously modulated +90  
degrees each clock period. This can be seen by viewing the HP/Agilent 8922 output with  
constant 1 or 0 data input. With modulation turned on, the carrier is “offset” +67.7 kHz.  
This is caused because the carrier is modulated at +90 degrees times 270.833 kHz = 67.7  
kHz. This also explains the common misunderstanding about why the carrier seems  
“offset” when no data is being applied.  
Because of ISI (Inter Symbol Interference) caused by the low-pass filtering, the effects of  
previous data bits can be seen on the RF output. To generate this complex signal, the A5  
Premod Filter and NSM uses a shift register to hold the current data bit, as well as the  
previous 6 data bits. These seven bits are used along with a look-up ROM to find the exact  
phase output that the HP/Agilent 8922 should generate, given the effects of ISI and 0.3  
Gaussian filtering.  
This information is given digitally to the NSM (Numerical Synthesis Machine) chip. This  
IC is a digital synthesizer that converts the digital input data into a digitally coded analog  
waveform that can be used to directly drive the A27 DAC/Upconverter assembly to get the  
correct analog waveform.  
The diagnostics program checks the A5 Premod Filter and NSM assembly by making sure  
the internal loop can lock to an external 270.833 kHz signal. Since the HP/Agilent 8922B  
and HP/Agilent 8922G clock signals are generated internally in other modules, it may be  
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Block Diagram Theory of Operation  
Block Diagram 2  
necessary to do manual troubleshooting to find out if the A5 Premod Filter and NSM  
assembly is correctly locking to these other clock signals. By using the service screen and  
viewing the latch (NSM_PMF_CLK), it can be determined if the loop is locked. A “1” on  
the latch indicates lock, while a “0” indicates no lock. If for some reason the loop is not  
locked, the generator will exhibit a high frequency and phase error.  
A27 DAC/Upconverter  
This assembly contains the circuits necessary to create a 0.3 GMSK waveform at 13.4  
MHz. The inputs to this module are the digital signals from the A5 Premod Filter and  
NSM assembly, as well as a 10 MHz reference signal from the A15 Reference assembly.  
These two are combined together as shown in Block Diagram 2, to produce the output  
signal at 13.4 MHz.  
An important characteristic of this signal is extremely low phase and frequency error. The  
output from this module can be accessed using the extender boards in the service kit and  
measured with either another HP/Agilent 8922 or a downconverter and HP/Agilent  
11836A software. The HP/Agilent 11836A software method is recommended if it is  
necessary to have a highly accurate measurement.  
The diagnostics procedure for this module only checks that an RF signal is present on the  
output. This output is fed into the A25 Sum Loop assembly where the signal is translated  
up to the RF frequency that was selected on the front panel.  
A26 Step Loop A  
This assembly creates RF reference signals from 486.6 MHz to 1016.6 MHz spaced 100  
kHz apart. These signals are derived from a 1 MHz output from the A15 Reference  
assembly and digital inputs from the A33 Hop Controller assembly. The HP 8922 has the  
ability to change RF frequencies very quickly. This is necessary because the radios and  
base stations change frequencies and the HP/Agilent 8922 must be able to change along  
with them. The A33 Hop Controller assembly controls which frequency the A26 Step  
Loop A assembly will create. Most radio and base station testing is done at carrier  
frequencies near 900 MHz. For these frequencies, the A26 Step Loop A assembly output  
is approximately 13.4 MHz lower than the RF output that was selected.  
A26 Step Loop A and A17 Step Loop B assemblies have exactly the same hardware and  
can be interchanged if necessary.  
IMPORTANT  
The A25 Sum Loop assembly is adjusted to match the A22 Step Loop A  
assembly. If either the A25 Sum Loop or A26 Step Loop A assembly is changed,  
it is necessary to readjust the A25 Sum Loop using the instructions in chapter 7,  
Adjustments and Calibration.  
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Block Diagram Theory of Operation  
Block Diagram 2  
To speed up the operation during frequency changes, a Sum Loop pretune line is provided  
by the A26 Step Loop A assembly and drives the A25 Sum Loop assembly. This pretunes  
the VCO in the A25 Sum Loop assembly to allow it to lock more quickly as the A26 Step  
Loop A and A27 DAC/Upconverter assemblies change frequencies.  
The diagnostics procedures check the A26 Step Loop A assembly at various frequencies  
but can only verify operation during static (non-hopped) operations. If the instrument  
meets its specifications during static operation but fails during frequency hopping, it may  
be that the A25 Sum Loop or A26 Step Loop A assemblies are slow to lock-up to the  
correct new frequency. The error might appear as a high phase or frequency error at the  
beginning of a new frequency hop, or the instrument may occasionally lose lock during a  
frequency hop. These might be symptoms of a mis-adjusted A25 Sum Loop or possibly a  
faulty A26 Step Loop A or A25 Sum Loop assembly.  
A25 Sum Loop  
This assembly contains the circuity to add together the CW signal from the A26 Step Loop  
A assembly and the modulated signal from the A27 DAC/Upconverter assembly. A  
pretune line is provided from the A26 Step Loop A assembly to speed up the ability of the  
A25 Sum Loop A assembly to phase lock. The output from this assembly is a 0.3 GMSK  
modulated signal at 500 to 1000 MHz, depending on the frequency that was selected.  
The A25 Sum Loop assembly is adjusted to match the tuning characteristics of the A26  
Step Loop A assembly. Whenever either of these two assemblies are changed, it is  
necessary to re-adjust the A25 Sum Loop assembly using the procedures in chapter 7.  
The diagnostic program checks the A25 Sum Loop assembly at various frequencies but  
can only verify operation during static (non-hopped) operations. Measurements are made  
to determine if the A25 Sum Loop assembly can phase lock and that RF power is available  
on the output. If the instrument meets its specifications during static operation but fails  
during frequency hopping, refer to the previous discussion about the A26 Step Loop A  
assembly.  
A13 Output  
The main purpose of this assembly is to provide the ability to translate the RF signal from  
the A25 Sum Loop assembly to different frequency bands and to amplify the RF level. For  
frequencies between 500 MHz and 1000 MHz, the path through the A13 Output assembly  
is “straight through” and the RF frequency remains constant. A “divide by 2” is used to  
create output frequencies from 250 MHz to 500 MHz. For frequencies below 250 MHz, a  
heterodyne section is used to mix the frequencies down to the desired output frequency.  
In addition to frequency translation and level correction, the A13 Output assembly  
provides AM modulation capabilities. The connections into and out of the A13 Output  
assembly are shown on Block Diagram 2.  
The diagnostic procedures verify the tracking filters, ALC loop controls and, DAC values,  
and measure RF output power at various frequency and power settings.  
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Block Diagram Theory of Operation  
Block Diagram 2  
A12 Pulse Attenuator  
In addition to 0.3 GMSK modulation, the RF signals must also be pulse modulated  
because the GSM system uses TDMA (time division multiplexing). The function of the  
A12 Pulse Attenuator assembly is to pass the RF output signal with 0 dB, 30 dB or > 80  
dB of attenuation. The A12 Pulse Attenuator assembly allows “straight through” operation  
to simulate the RF carrier ON or it provides >80 dB of attenuation to turn the RF carrier  
OFF. In addition to these two functions, the A12 Pulse Attenuator assembly can provide a  
calibrated 30 dB of attenuation. This is used to test a radios ability to recover a weak  
signal with other high power signals in adjacent time slots.  
The diagnostics procedures check this assembly by using the internal RF spectrum  
analyzer. The pulse attenuator itself is solid state and highly reliable. Diagnosing the  
attenuator requires many other assemblies in the HP/Agilent 8922. Diagnostic failures of  
the Pulse Attenuator could also be caused by the A23 Input, A11 Receiver Mixer, A16  
Receiver, A17 Step Loop B, or A18 Spectrum Analyzer assemblies, or a missing LO cable  
on the rear panel (early instruments).  
A23 Input  
A24 High Power Attenutor  
The A23 Input assembly is both the input for the Signal Analyzer section and the final  
output from the Signal Generator section. For additional information on how the A23  
Input assembly is used in the signal analyzer, refer to the Block Diagram 1 discussion.  
The RF output signal is received from the A12 Pulse Attenuator assembly. The A23 Input  
assembly has a step attenuator (5 dB/step) that can attenuate the RF signal up to 125 dB.  
The A23 Input assembly also contains a switch to select the proper output port. For high  
output levels, the port AUX RF OUT is available. For most operations, the RF signal is  
routed to the RF IN/OUT port and connected directly to a radio or transmitter. The radios  
are “duplex”, meaning they simultaneously transmit and receive at different frequencies.  
The most common setup is to have the HP/Agilent 8922 Signal Generator routed to the RF  
IN/OUT connector to simulate a base station and is “transmitting” to the radio-under-test.  
At the same time, the radio-under-test is “transmitting” to the HP/Agilent 8922 Signal  
Analyzer at a frequency offset by 45 MHz. This signal comes in the HP/Agilent 8922 RF  
IN/OUT connector and is routed to the Signal Analyzer section.  
The 14 dB (8 dB with the HP/Agilent 8922F,H,M,S) A24 High Power Attenuator  
assembly is shown on Block Diagram 1 inside the A23 Input block. It is actually external  
to the Input Module and provides 14 dB attenuation of all signals going into or coming out  
of the RF IN/OUT connector on the front panel.  
Diagnostic procedures individually check that all the step attenuator switches provide  
attenuation, although the accuracy of this measurement is limited. A connectivity check is  
provided with the diagnostics to verify the connections going into and out of the A23  
Input assembly. This section is the most likely cause of output level accuracy problems,  
especially “hard failures” where the output is incorrect by 5 to 20 dB (indicating an  
attenuator pad has failed).  
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Block Diagram Theory of Operation  
Block Diagram 2  
A4 Modulation Distribution  
A6 Signaling Source/Analyzer  
These modules are leveraged from an earlier product, the HP/Agilent 8920A, which is  
primarily an analog communications test set. Many of the audio circuits in these  
assemblies are not used by the HP/Agilent 8922 and will not be covered in this discussion.  
Refer to the HP/Agilent 8920A Assembly Level Repair manual if further detail on these  
modules is required.  
For the HP/Agilent 8922, the function of the A6 Signaling Source/Analyzer is simply to  
create sinusoidal audio signals. The analyzer capabilities of this module are not used in the  
HP/Agilent 8922. The A4 Modulation Distribution assembly provides gain, attenuation,  
and distribution functions of these audio signals as well as the AM/Speech input from the  
front panel. The interconnection of these modules is shown on Block Diagram 2.  
The diagnostic procedures for these modules are extensive. Like the hardware, the  
diagnostics have been leveraged from the HP/Agilent 8920A and test more of the circuits  
than are actually used in the HP/Agilent 8922. The diagnostic output from these modules  
documents the exact circuits in the modules which are tested.  
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Block Diagram Theory of Operation  
Block Diagram 3 HP/Agilent 8922B Only  
Block Diagram 3  
HP/Agilent 8922B Only  
The HP/Agilent 8922B contains 3 modules: A35 “B” Reference; A36 FIFO/GPIO; and  
A37 Sequence Controller assemblies that are not used in either the HP/Agilent 8922A or  
HP/Agilent 8922G. The function of these three modules can only be controlled using the  
rear panel GPIO connector (found only on the HP/Agilent 8922B) and the special control  
software that is supplied with the HP/Agilent 8922B. At power-up, the HP/Agilent 8922B  
appears to be an “A” version and should respond exactly the same as an HP/Agilent  
8922A. The overall operation of the HP/Agilent 8922B is to buffer and synchronize data  
from an external computer. This data is then transmitted by the HP/Agilent 8922  
Generator hardware. The internal connections of this hardware are illustrated in Block  
Diagram 3.  
To the user at the front panel and for the memory card diagnostics, the instrument appears  
to be an HP/Agilent 8922A. Any signals that are generated by the HP/Agilent 8922B  
hardware appear as “external” for the control settings.  
For diagnosing problems with these modules, it is necessary to use the HP/Agilent 8922B  
software. The software contains testing routines that load the buffers with data and read  
the data back. The software is also necessary to control the switches and circuits within the  
modules.  
A35 “B” Reference  
This module contains the VCO and divider circuits necessary to lock to most common  
reference frequencies used for GSM radio testing. These include 1, 2, 5, 10, and 13 MHz,  
as well as 270.833 kHz data rate clock and 216.667 kHz frame rate clock. The frequency  
must be selected using the software provided with the HP/Agilent 8922B.  
This module provides a 10 MHz signal to the rear panel and a 270.833 kHz signal to the  
A37 Sequence Controller assembly.  
A36 FIFO/GPIO  
The A36 FIFO/GPIO assembly has 2 primary functions. The first is to communicate  
through the GPIO bus to an external controller and relay these control signals to the other  
HP/Agilent 8922B modules. To control any of the HP/Agilent 8922B modules it is  
necessary that the A36 FIFO/GPIO assembly communications are working correctly. The  
second function of the A36 FIFO/GPIO assembly is to store and send the digital data  
information that is “transmitted” by the RF Generator portion of the HP/Agilent 8922. The  
diagnostic software has a FIFO RAM test to verify that the hardware can send and receive  
data from the external computer.  
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Block Diagram Theory of Operation  
Block Diagram 3 HP/Agilent 8922B Only  
A37 Sequence Controller  
The A37 Sequence Controller assembly contains the switches which cause an HP/Agilent  
8922B to function like an HP/Agilent 8922B instead of an HP/Agilent 8922A. Activating  
the switches causes the Clock, Data, Pulse Modulation, and Frequency Hop data to be  
generated using the HP/Agilent 8922B modules.  
The 270.833 kHz clock and data signals, which are normally routed from the front panel,  
are now received from the A36 FIFO/GPIO assembly with the clock and data all properly  
synchronized. The pulse modulation and frequency hop information from the external  
computer is stored in the A37 Sequence Controller assembly, where it is synchronized and  
routed to the signal generator portion of the HP/Agilent 8922B to be transmitted.  
Like the A36 FIFO/GPIO assembly, the HP/Agilent 8922B software also contains a Frame  
Control RAM test, and a HOP RAM test, to verify the ability of the external computer to  
read and write to the A37 Sequence Controller assembly.  
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Block Diagram Theory of Operation  
Block Diagram 4  
Block Diagram 4  
This block diagram illustrates the assemblies that are unique to the HP/Agilent 8922E/F/  
G/H. These modules are primarily digital and represent the hardware necessary to create  
the digital protocol to set up and maintain a phone call with a GSM mobile phone. A  
special diagnostics “loopback” program is included on the diagnostic memory card. This  
program causes the HP/Agilent 8922E/F/G/H to set up a phone call to itself (loopback),  
and measure the bit error rate. This exercises most of the digital hardware and gives a high  
confidence that the A31 CODEC, A32 GSM Controller, and A34 GSM RTI assemblies are  
operating correctly.  
A31 CODEC  
A32 GSM Controller  
A34 GSM RTI  
The A31 CODEC assembly provides the speech processing (coding and decoding) to  
convert the analog speech to and from the GSM format. This assembly also provides many  
of the real time channel processing functions that keeps the HP/Agilent 8922G  
synchronized with the mobile radio.  
Overall control of the A31 CODEC, A32 GSM Controller, and A34 GSM RTI assemblies  
is provided by the A32 GSM Controller assembly. This A32 assembly interfaces with the  
main controller (A7) for communication with the remainder of the instrument. The A32  
GSM Controller assembly also communicates with the Option 003 A35 Protocol Interface  
assembly.  
The A34 GSM RTI (Real Time Interface) assembly provides the logic and switches to  
interface the data, clock and synchronization signals into the analog RF generator and RF  
analyzer hardware. This assembly replaces a jumper board (A34 in the HP/Agilent 8922A  
instrument) which allows it to access external signals from the front and rear panel, as well  
as provide key signals to the A33 Hop Controller assembly and A5 Premod Filter/NSM  
assembly.  
A35 Protocol Interface (HP/Agilent 8922F/HM/S Option 003 Only)  
This assembly buffers the digital signal from the A32 GSM Controller assembly to the  
rear panel where it can be connected to a protocol analyzer. This option allows a user to  
view the messages that are passed over the communication channel between the radio and  
the HP/Agilent 8922F/H.  
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Block Diagram Theory of Operation  
Block Diagram 5  
Block Diagram 5  
This block diagram illustrates the busses that interconnect the instrument controllers (A7  
Controller, A32 GSM Controller, A34 GSM RTI, and A37 Sequence Controller) with the  
other assemblies. Chapter 5 “Troubleshooting the Controller/Display” contains  
information about troubleshooting and an explanation of the serial and parallel busses that  
interconnect the assemblies.  
A19 Measurement  
The A19 Measurement assembly contains the circuits necessary to measure voltage and  
count frequency. These circuits are interconnected throughout the instrument with a series  
of multiplexers. The measurement board also synchronizes the measurements for the  
spectrum analyzer and the oscilloscope display. The block diagram shows the pin numbers  
and signal names of most voltage and counter inputs to this assembly.  
While there are no specific diagnostics for the A19 Measurement assembly, it is used  
extensively to diagnose other parts of the instrument. If the diagnostics incorrectly  
indicate a faulty assembly, the measurement board may be a likely cause. Use the pin  
number information to verify that the voltages and frequencies are properly transferred  
from the modules to the A19 Measurement assembly.  
A33 Hop Controller  
The A33 Hop Controller assembly controls the I/O to most analog and RF hardware in the  
instrument. Problems with this assembly will usually appear as multiple failures during  
the power up diagnostics (as indicated on the A7 LED’s). The A33 Hop Controller  
assembly communicates to the main controller (A7 Controller) with a parallel bus, and  
through a serial bus to the other analog hardware. This illustration is included with pin  
numbers to allow troubleshooting the serial busses and communication failures to the  
modules. Again, no specific memory card diagnostics exist for this module. It is unlikely  
that memory card programs could be executed if the A33 Hop Controller assembly is  
defective.  
To understand more about the serial and parallel busses connected to the A33 Hop  
Controller assembly, refer to the chapter 5 discussion.  
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15  
Diagnostics Theory  
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Diagnostics Theory  
Introduction  
Introduction  
This chapter describes what is tested by the memory card based or ROM based diagnostics  
and how to interpret the level of certainty that is attached to failure reports. This chapter is  
broken into sections for each of the diagnostic tests and a section for how to interpret  
results.  
This chapter uses the current diagnostic test names for firmware revision code A.03.00 and  
above. Memory card based diagnostic test names may differ from the current names.  
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Diagnostics Theory  
AF_DIAGS  
AF_DIAGS  
Audio Frequency Generators 1 and 2  
This test checks the A6 Signaling Source/Analyzer assembly. As a test signal, a digital “1”  
exercises DACs on the output of the A6 Signaling Source/Analyzer assembly to verify  
voltage range, using the voltmeter at the LFS1_VM and LFS2_VM outputs.  
Preliminary Audio Paths  
This test checks the A4 Modulation Distribution assembly. The 9 possible paths through  
the A4 Modulation Distribution assembly are checked using signals from the A6  
Signaling Source/Analyzer assembly, routing the signals to the voltmeter through the A3  
Audio Analyzer 1 assembly at AUD1_VM, or the A2 Audio Analyzer 2 assembly at  
AUD2_VM, for path 9.  
Modulation Distribution Internal Paths  
This test checks the A4 Modulation Distribution assembly. Using the two inputs from the  
A6 Signaling Source/Analyzer assembly, the same paths as the Preliminary Audio Paths  
test are checked again. During the test the gain and attenuation of the paths are varied.  
Modulation Distribution External Paths  
This test checks the A4 Modulation Distribution assembly. Using the AFG1 output from  
the A6 Signaling Source/Analyzer assembly, the external MODULATION IN AM/  
SPEECH path through the A4 Modulation Distribution assembly is checked. The AFG1  
input is checked first to verify that it can be used as a test signal. An external connection is  
used to route the AUDIO OUT connector on the front panel to the MODULATION IN  
AM/SPEECH connector. The gain and coupling of the path are varied. The signals are  
routed from the MOD_MON output of the A4 Modulation Distribution assembly to the  
A3 Audio Analyzer 1 assembly for routing to the voltmeter through the AUD1_VM  
output.  
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Diagnostics Theory  
AF_DIAGS  
Audio Analyzer 1 Internal Paths  
This test checks the A3 Audio Analyzer 1 assembly. Using the AFG1 output of the A6  
Signaling Source/Analyzer assembly (through the A4 Modulation Distribution assembly),  
the 12 internal paths of the A3 Audio Analyzer 1 are checked. Two of the paths are not  
used in the HP/Agilent 8922 and will be shown as “No optional high(low)-pass filter  
sensed”. (Ignore this error message on this test.) Paths 1 through 4 are routed directly to  
the voltmeter through the AUD1_VM output, while paths 5 through 12 are routed to the  
peak detector in the A2 Audio Analyzer 2 assembly before being routed to the voltmeter  
through the AUD2_VM output. The gain and coupling are varied and each path is  
checked.  
Audio Analyzer 1 External Paths  
This test checks the A3 Audio Analyzer 1 assembly. The front panel AUDIO IN path is  
selected and de-selected while using an external connection from the front panel AUDIO  
OUT connector (which uses the AFG1 output from the A6 Signaling Source/Analyzer  
routed through the A4 Modulation Distribution assembly). The signal is routed to the  
voltmeter through the AUD1_VM output.  
Audio Analyzer 2  
This test checks the A2 Audio Analyzer 2 assembly. Using the AFG1 output from the A6  
Signaling Source/Analyzer assembly routed through the A4 Modulation Distribution  
assembly to the MOD_MON output, the 14 paths through the A2 Audio Analyzer 2 are  
checked. Each of the measurements go directly to the voltmeter through the AUD2_VM  
output.  
15-4  
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Diagnostics Theory  
RF_DIAGS  
RF_DIAGS  
Reference  
This test checks the A15 Reference Section assembly.  
10 MHz Lock Detector State  
The 10 MHz VCO is measured using the counter; however, the counter uses the reference  
so the measurement is an indication that the counter is working. This verifies that both the  
reference and the count signal are reaching the counter.  
1 GHz Oscillator Lock Detector State  
The 1 GHz VCO lock detector is checked for lock.  
1 GHz and 500 MHz Level Detectors  
The 1 GHz and 500 MHz level detectors are checked to test for signals from these outputs.  
10 MHz Fine and Coarse DACs State  
The 10 MHz VCO is checked for locks at both ends of the tune DAC range.  
NSM and Pre-Modulation Filter  
This test checks the A5 Premod Filter and NSM assembly.  
NSM Clock Detector State  
The presence of a clock is checked.  
Pre-Modulation Filter Clock Detector State  
The Premod filter clock is checked for lock with both a clock present and not present. The  
front panel AUDIO OUT is used as a test clock. It is connected to the front panel  
MODULATION CLOCK input.  
DAC and Up-Converter  
This test checks the A27 DAC/Upconverter assembly.  
Detector Output Level  
This test checks for an output at several frequencies using the voltmeter at the AUX4_VM  
output.  
15-5  
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Diagnostics Theory  
RF_DIAGS  
RF Generator Step Loop  
This test checks the A26 Step Loop A assembly.  
RF Generator Loop 1 MHz Reference Detector  
This test checks for the presence of a reference.  
RF Generator Loop Lock Detector State  
The lock detector is checked at several frequencies.  
RF Generator Loop Output Detector  
The level detector is checked at several frequencies.  
Sum Loop  
This test checks the A25 Sum Loop assembly.  
RF Generator Sum Loop Lock Detector State  
This test checks the lock detector at several frequencies.  
RF Generator Sum Loop VCO Tuning Level  
This test checks the VCO tune voltage at several frequencies.  
Output Section  
This test checks the A13 Output assembly.  
Power Supplies and Amplifier Bias  
The +8 Vdc supply generated by the A13 Output assembly is measured by the voltmeter at  
the OUT_POS_8V output. The -6 Vdc supply generated by the A13 Output assembly is  
measured by the voltmeter at the OUT_NEG_6V output. The bias voltage on the output  
amplifier is measured by the voltmeter at the OUT_AMP_BIAS output.  
Carrier Level DAC  
The carrier level DAC is checked first by turning on each bit one at a time and then with all  
the bits on, measuring with the voltmeter at the OUT_LEVEL_REF output. The limits are  
based on the value of the -6 Vdc measurement.  
Filter Tune DAC  
The filter tune DAC is checked the same way the carrier level DAC is checked at the  
OUT_TUNE_FILTER output.  
15-6  
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Diagnostics Theory  
RF_DIAGS  
Open Loop ALC Drive  
This test opens the ALC loop and checks the voltage that appears on the output of the  
modulator with the DAC at full scale, measured at the OUT_ALC_DRIVE using the  
voltmeter referenced to the -6 Vdc measurement.  
Output Detector, Detector Caps  
The output capacitors are switched in and out and the output level is measured by the  
voltmeter at the OUT_OUTPUT_LEVEL output.  
Output Detector, Low Level  
When the carrier level DAC is set to 0, there should be no RF output detected by the  
voltmeter measuring at the OUT_OUTPUT_LEVEL output.  
Output Frequency Range, Loop Closed  
The frequency is varied and the detector voltage is measured by the voltmeter at the  
OUT_OUTPUT_LEVEL output.  
Bandwidth Control  
The bandwidth control bits are varied and the detected output is measured by the voltmeter  
at the OUT_OUTPUT_LEVEL output.  
Tracking Filter Rejection  
The ALC loop is opened and the tracking filters are checked by setting the RF frequency  
to the center of the two bands while changing the filter DAC to below the RF frequency  
and measuring the detected level with the voltmeter at the OUT_OUTPUT_LEVEL  
output.  
Pulse Attenuator and Drive  
This test checks the A14 Pulse Driver assembly.  
Pulse Attenuator and Drive Test  
A reference measurement is made and the signal is pulsed using the front panel AUDIO  
OUT to drive the front panel MODULATION IN PULSE input.  
13 MHz Oscillator Lock Detector  
The 13 MHz VCO lock detector is measured to check the 13 MHz VCO.  
Input Section  
This test checks the A23 Input assembly.  
15-7  
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Diagnostics Theory  
RF_DIAGS  
RF Detectors 1  
The low and high sensitivity detectors are checked both with and without a signal present.  
Step Attenuator  
The step attenuator is checked by switching in one pad at a time.  
RF Detectors 2  
The filter output detector is checked with no signal present.  
Filter Output Detector, Signal Present  
The filter output detector is checked with a signal present at different frequencies.  
Output Filter Rejection  
Each filter is checked to see that it rejects frequencies outside its passband.  
Output Variable Attenuator  
The variable attenuator is checked by programming the DAC to full scale, then reading the  
voltage on the output detector. Then the DAC is programmed to values which turn on the 5  
most significant bits one at a time, starting with the MSB and measuring the detector  
output each time.  
Autorange Attenuator  
The autorange attenuator is programmed to each of its possible values and the output  
detector is measured each time.  
Counter With TTL Dividers  
The signal from the RF generator is routed to the counter TTL prescalers. The frequency  
of the signal is set to all values between 10 and 250 MHz in 5 MHz steps.  
Counter With ECL Dividers  
The signal from the RF generator is routed to the counter ECL prescalers. The frequency  
of the signal is set to all values between 50 and 1000 MHz in 50 MHz steps.  
Temperature Sensor  
The temperature sensor produces a DC voltage proportional to the internal temperature.  
RF Analyzer Step Loop  
This test checks the A17 Step Loop B assembly.  
15-8  
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Diagnostics Theory  
RF_DIAGS  
RF Analyzer Loop 1 MHz Reference Detector  
This test checks for the presence of the 1 MHz reference.  
RF Analyzer Loop Lock Detector  
This test checks the loop for lock at several frequencies.  
Loop B Output Detector  
This test checks the level detector at several frequencies.  
Spectrum Analyzer  
This test checks the A18 Spectrum Analyzer assembly.  
Detector Output  
The RF generator is routed externally to the spectrum analyzer through the AUX RF OUT  
and AUX RF IN front panel connectors. The level is set to a very low level (-100 dBm),  
and the spectrum analyzer detector is measured.  
Stepped Gain  
The stepped gain amplifiers are check using a 0 dB measurement as a reference. The steps  
are then measured one at a time using the detector.  
IF Bandwidth  
The IF bandwidth is set to all possible values and the voltage is measured by the detector.  
Filter Rejection  
The LO frequency is set at 10 times the bandwidth away from the center frequency of each  
filter, then the detector is read.  
Variable Gain IF Amplifier  
The variable IF gain amplifier is checked by turning on one bit of the control DAC at a  
time, starting with the LSB. The detector is checked as each bit is turned on.  
RF Input Signal  
With the internal calibration signal disabled, the RF generator and RF analyzer are set to  
100 MHz for an IF of 114.3 MHz at the input of the spectrum analyzer. The signal is  
routed internally through the coupler on the RF IN/OUT port of the A23 Input assembly  
and the level is measured.  
Receiver  
This test checks the A16 Receiver assembly.  
15-9  
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Diagnostics Theory  
RF_DIAGS  
Down Converters (With Spectrum Analyzer) Test  
The RF generator is fed to the receiver IF through the A23 Input and A11 Receiver Mixer  
assemblies to the second mixer in the receiver. The signal is measured by the spectrum  
analyzer at three frequencies at the SA_114.3M output.  
IF Counter Test  
The signal is measured again after the third mixer and FM discriminator at the IF_CNT  
output by the counter.  
AGC Open Loop (At AM Output) Test  
The AGC open loop operation is checked at both high and low levels at three DAC level  
settings. The signal is measured after the pulse detector at the DEMOD_AUD output. This  
DC level represents the IF level.  
AGC Closed Loop (At AM Output) Test  
The AGC loop is closed and the level at the DEMOD_AUD output is measured again with  
both AM and Pulse selected.  
AGC Reference DAC Test  
The AGC loop is opened and the closed loop level DAC is measured by the voltmeter at  
the AUX7_VM output.  
AGC Open-Loop Drive DAC Test  
The AGC loop is opened and the open loop level DAC is measured by the voltmeter at the  
AUX7_VM output.  
Temperature Test  
The temperature sensor is measured by the voltmeter at the AUX7_VM output.  
AM Demodulator Test  
The AUDIO OUT source is routed to the MODULATION IN AM/SPEECH connector  
externally to produce an AM signal and the demodulated AM is measured at the  
DEMOD_AUD output by the voltmeter through the A3 Audio Analyzer 1 assembly.  
FM Demodulator Test  
The FM demodulator is measured statically by changing the RF generator frequency by a  
small amount and measuring the DC voltage change at the output of the FM demodulator  
at the DEMOD_AUD output by the voltmeter through the A3 Audio Analyzer 1 assembly.  
15-10  
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Diagnostics Theory  
MS_DIAGS  
MS_DIAGS  
External Reference  
Ext Reference Present Detector  
The external reference detector is read.  
Ext Reference Lock Detector  
The 10 MHz loop lock detector is read. Ext Reference Lock Out; the external reference  
lock out is checked by locking out the external reference and checking the external  
reference lock detector.  
RF Input/Output  
RF In/Out to Aux RF Out Test  
Using an external connection, the power is measured using the CW/AF Analyzer.  
Aux RF Out to Aux RF In  
Using an external connection, the filter output detector level is measured by the voltmeter  
through the voltmeter multiplexer.  
Instrument Self Test  
The power-up self tests are invoked internally.  
Power Supplies On Measurement Board  
The power supply sense points on the A19 Measurement assembly are read.  
15-11  
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Diagnostics Theory  
GSM and DCS Diagnostic Tests  
GSM and DCS Diagnostic Tests  
Each of these tests performs a functional check on the instrument by generating a test  
signal and looping the signal back to the measurement hardware.  
The tests with titles beginning with E are for use with an HP/Agilent 8922E. Tests with  
titles beginning with G are for use with an HP/Agilent 8922G. Tests without an E or G  
prefix are used with the HP/Agilent 8922F/H/M/S.  
The HP/Agilent 8922E/G DCS tests, EDCSDIAG and GDCSDIAG check instruments  
that have an HP/Agilent 83220A installed. The HP/Agilent 8922E/G GSM tests  
EGSMDIAG and GGSMDIAG are used for instruments without an HP/Agilent 83220A  
installed. The HP/Agilent 8922F/H/M/S diagnostic test are also in two forms. GSMDIAG  
checks the HP/Agilent 8922F/H/M/S. The diagnostic test DCSDIAG tests either the HP/  
Agilent 83220A or the HP/Agilent 83220E, which ever instrument is installed.  
Using internal routing and generation, a known bit pattern is modulated and sent to the  
AUX RF OUT port of either the HP/Agilent 8922E/F/G/H or the HP/Agilent 83220A.  
With an external connection made to the RF IN/OUT port the instrument demodulates the  
signal and performs a BER measurement and DSP measurement. This test provides a  
functional test of the assemblies that can not be checked directly as with the other  
diagnostic tests. The assemblies checked include the A31 CODEC, the A32 GSM  
CONTROLLER, and the A34 GSM RTI. The HP/Agilent 83220A can be further verified  
for failure by disconnecting it and running the appropriate GSM test on the HP/Agilent  
8922E/F/G/H/M/S. This will show whether the instrument still fails without the HP/  
Agilent 83220A. The HP/Agilent 83220E diagnostic tests are less extensive.  
15-12  
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Diagnostics Theory  
Interpreting Results  
Interpreting Results  
When a failure occurs, a message is displayed showing the number of failures and the  
probability that the failure is caused by the assembly being tested. If the probability is not  
high, more measurements may be necessary to verify the failure.  
The probability assigned is based on the following criteria:  
Low: A failure occurred, but the signal being used for the measurement originates in  
another assembly and has not been previously tested on this assembly. Low probability is  
also assigned for the first measurement made to an assembly.  
Medium: A failure occurred and the signal being used for the measurement originates in  
another assembly and has already been measured good, but the measurement mux  
(multiplex) point or digital detector has not previously been used.  
High: A failure occurred and the signal being used for the measurement originated in  
another assembly and has already been measured good, and the measurement mux point  
or digital detector has already been used.  
The RF diagnostics assign probability based on the first failure that occurs. The audio  
diagnostics assign probability based on a series of measurements.  
15-13  
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Diagnostics Theory  
Interpreting Results  
This Page Intentionally Left Blank  
15-14  
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16  
Measurement Theory  
16-1  
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Measurement Theory  
Introduction  
Introduction  
This chapter describes which blocks of the instrument are used in the various  
measurements. The measurements described include the following:  
•
•
•
•
•
•
•
BIT ERROR  
DSP ANL  
OUT RF SP  
PULSE  
CW MEAS/AF ANL  
SCOPE  
SPEC ANL  
The descriptions are given in terms of which path the signal under test takes from the front  
panel to the measurement point. This chapter does not describe how a radio under test is  
stimulated to output the signals that are being measured.  
BIT ERROR  
•
•
•
•
•
A23 Input  
A11 Receiver Mixer  
A16 Receiver  
A9 Global Test and Demod  
A31 CODEC  
The bit error test is a test where a known data pattern is sent to the radio under test and is  
looped back to measure how many errors are generated by the radio under test through  
receiving and transmitting the same data. The Bit Error test signal is routed through the  
front-panel and through the RF hardware. The signal is demodulated at the A9 Global Test  
and Demod assembly. After the signal is demodulated the recovered clock and data signals  
are routed to the A31 CODEC assembly. The A31 CODEC assembly both generates the  
test data pattern and does the comparison after the data is recovered after being transmitted  
and received. After the measurement is done the measurement numbers are sent to the A7  
controller to be sent to the display section.  
16-2  
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Measurement Theory  
Introduction  
DSP ANL  
•
•
•
•
A23 Input  
A11 Receiver Mixer  
A16 Receiver  
A9 Global Test and Demod  
The DSP analyzer measurements digitally analyze the signal under test. The signal is  
leveled and converted to a 10.7 MHz IF and routed to the A9 Global Test and Demod  
assembly where the signal is digitized and the actual measurements are made. After the  
measurement is done the measurement numbers are sent to the A7 Controller to be sent to  
the display section.  
OUT RF SP  
•
•
•
•
•
A23 Input  
A11 Receiver Mixer  
A16 Receiver  
A18 Spectrum Analyzer  
A19 Measurement  
The output RF spectrum is a GSM required measurement that is a zero span spectrum  
analyzer measurement at specific offsets from the carrier frequency. Refer also to the  
SPEC ANL description.  
PULSE  
•
•
•
•
•
A23 Input  
A11 Receiver Mixer  
A16 Receiver  
A18 Spectrum Analyzer  
A19 Measurement  
The pulse measurement is used to measure the −70 dB point of a GSM pulse because the  
DSP analyzer will only measure to −30 dB. This is a spectrum analyzer measurement.  
Refer also to the SPEC ANL description.  
16-3  
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Measurement Theory  
Introduction  
CW MEAS/AF ANALYZER  
•
•
•
•
•
•
•
A23 Input  
A19 Measurement  
A11 Receiver Mixer  
A16 Receiver  
A3 Audio Analyzer 1  
A2 Audio Analyzer 2  
A4 Modulation Distribution  
The CW measurements are power and frequency. For the power measurement, the detector  
is in the A23 Input assembly and is measured by the voltmeter in the A19 Measurement  
assembly. The AF analyzer measurements are either demodulated signals that pass  
through the A23 Input, A11 Receiver Mixer, and A16 Receiver assemblies or internal and  
external audio signals that pass through the A4 Modulation Distribution assembly before  
being routed to the A3 Audio Analyzer 1 assembly. The A3 Audio Analyzer assembly  
either passes the signals to the A19 Measurement assembly or to the A2 Audio Analyzer 2  
assembly before routing to the A19 Measurement assembly. After the measurement is  
done the measurement numbers are sent to the A7 Controller to be sent to the display  
section.  
SCOPE  
The oscilloscope has the AF analyzer as a front end so the routing configurations that can  
be done for the AF ANALYZER are also possible for oscilloscope measurements. The  
A19 Measurement assembly makes the oscilloscope measurements. After the  
measurement is done the measurement numbers are sent to the A7 Controller to be sent to  
the display section.  
SPEC ANL  
•
•
•
•
•
A23 Input  
A11 Receiver Mixer  
A16 Receiver  
A18 Spectrum Analyzer  
A19 Measurement  
The spectrum analyzer signal receives its signal from the RF input stages after the signal is  
converted to a 114.3 MHz IF in the A16 Receiver assembly. The A18 Spectrum Analyzer  
assembly works together with the A19 Measurement assembly. The A18 Spectrum  
Analyzer receives sweep and trigger signals from the A19 Measurement assembly and  
returns analog level signals to the A19 Measurement assembly. The A19 Measurement  
16-4  
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Measurement Theory  
Introduction  
assembly digitizes the signals from the A18 Spectrum Analyzer assembly. After the  
measurement is done the measurement numbers are sent to the A7 Controller to be sent to  
the display section.  
16-5  
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Measurement Theory  
Introduction  
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17  
GSM Theory  
17-1  
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GSM Theory  
Introduction  
Introduction  
The HP/Agilent 8922 product family is designed to measure and generate signals for the  
GSM digital cellular telephone system. The HP/Agilent 8922 is both a signal generator  
and a measuring receiver.  
This chapter describes GSM system signals that are generated and received by the HP/  
Agilent 8922. The GSM system is not described in detail due to complexity. This chapter  
is intended only to describe the system as it relates to servicing the HP/Agilent 8922,  
meaning the need to know the character of the signals generated and received.  
17-2  
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GSM Theory  
The GSM System  
The GSM System  
The GSM system uses two frequency bands ranging from 890 to 915 MHz and  
935 to 960 MHz. The bands are broken into 125 channels spaced 200 kHz apart.  
The GSM system uses one band to transmit and one to receive. The lower frequency band  
(890-915 MHz) is used for the Mobile telephone to Base station link; the upper band is for  
Base to Mobile.  
Channels from each band are used in uplink/downlink channel pairs. The channels in the  
channel pair are spaced 45 MHz apart.  
The GSM system is time multiplexed, meaning that it is pulsed to allow multiple users  
access to the same channel. On each channel there are eight timeslots so that eight users  
can be on a channel at the same time. The pulses or timeslots are 576.9 µS long.  
The GSM system has the capability of being frequency hopped within the frequency  
bands. This allows the system to hop the telephone to another channel and possibly  
another timeslot during a telephone call.  
The GSM system uses a 0.3 Gaussian Minimum Shift Keying modulation scheme to  
modulate the digital data onto the pulsed carrier.  
The digital data for one pulse is made up of both voice data and predefined data that is  
used for synchronization. The voice data is coded to maximize speech quality and  
minimize errors.  
For most of the characteristics mentioned above the GSM system contains many variables.  
These variables account for the many screens and fields in the HP/Agilent 8922.  
17-3  
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GSM Theory  
E-GSM, DCS1800 and PCS1900 Systems  
E-GSM, DCS1800 and PCS1900 Systems  
GSM900 is the original GSM system, using frequencies in the 900 MHz band and  
designed for wide area cellular operation. Mobiles with output powers from 1 to 8W are  
typical. DCS1800 is an adaptation of GSM900. The term GSM can be used collectively  
to describe the GSM900 and DCS1800 standards. Creating DCS1800 involved widening  
the bands assigned to GSM and moving them up to 1.8 GHz. The DCS1800 standard was  
created to allow PCN (Personal Communications Networks) to form.  
To avoid confusion, the channel numbers (ARFCN) used for DCS run from 512 to 885.  
GSM900 channels run from 1 to 124. With wider frequency allocation, leading to more  
channels, DCS1800 is able to cope with higher user densities. DCS1800 mobiles are also  
designed for lower output powers (up to 1W), so cell sizes have to be smaller, meaning  
even higher densities. In all other respects, GSM900 and DCS1800 are the same.  
The GSM phase 2 specifications brings the two systems even closer. GSM900 gets  
additional bandwidth and channels, called E-GSM (Extended band GSM) and lower  
power control levels for mobiles, allowing micro-cell operation. These two features allow  
increased user densities in GSM systems.  
PCS1900 is in the band around 2 GHz for a PCS (Personal Communications System).  
This version of GSM is variously called DCS1900 or PCS1900. In technical terms  
PCS1900 is identical to DCS1800 except for frequency allocation.  
17-4  
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Index  
A14 Pulse Driver  
diagnostics, 15-7  
A15  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
specs, 12-26  
A15 Reference Section  
diagnostics, 15-5  
A16  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
specs, 12-32  
A20  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
troubleshooting, 5-2  
A21  
Symbols  
”B” Reference  
theory, 14-15  
Numerics  
1 GHz and 500 MHz Level Detectors  
theory, 15-5  
1 GHz Oscillator Lock Detector State  
theory, 15-5  
10 MHz Fine and Coarse DACs State  
theory, 15-5  
10 MHz Lock Detector State  
theory, 15-5  
13 MHz Oscillator Lock Detector  
theory, 15-7  
part location, 9-9  
part number, 9-8  
troubleshooting, 5-2  
A21 HP-IB Interface Removal, 8-14  
A22  
part location, 9-9  
part number, 9-8  
A22 Display Removal, 8-16  
A23  
part location, 9-9  
part number, 9-8  
theory, 14-4, 14-13  
troubleshooting, 5-2  
A23 (A,B,E,F,G,H)  
specs, 12-43  
theory, 14-6  
A16 Receiver  
diagnostics, 15-9  
A17  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
theory, 14-5, 14-11  
A17 Step Loop B  
diagnostics, 15-8  
A17,25  
specs, 12-53  
A18  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
specs, 12-36  
A
A1  
part number, 9-4, 9-5  
troubleshooting, 5-2  
A1 Front Panel removal, 8-7  
A10  
part location, 9-7  
A10 Power Supply Regulator Removal,  
8-9  
A23 (M,S)  
specs, 12-47  
A23 Input  
diagnostics, 15-7  
A23 Input Section Removal, 8-18  
A24  
part location, 9-9  
part number, 9-8  
theory, 14-4, 14-13  
A24 Attenuator Removal, 8-19  
A25  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
specs, 12-50  
A11  
part location, 9-7  
part number, 9-6  
specs, 12-19  
theory, 14-5  
A12  
part location, 9-7  
part number, 9-6  
theory, 14-13  
A12 Pulse Attenuator Removal, 8-12  
A13  
part location, 9-7  
Service Kit, 4-5  
specs, 12-22  
theory, 14-7  
A18 Spectrum Analyzer  
diagnostics, 15-9  
A19  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
specs, 12-38  
theory, 14-18  
A2  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
specs, 12-3  
theory, 14-12  
A25 Sum Loop  
diagnostics, 15-6  
A26  
part location, 9-9  
part number, 9-8  
Service Kit, 4-5  
theory, 14-11  
A26 Step Loop A  
diagnostics, 15-6  
A27  
theory, 14-12  
A13 Output  
diagnostics, 15-6  
A14  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
specs, 12-24  
theory, 14-7  
A2 Audio Analyzer 2  
diagnostics, 15-4  
part location, 9-9  
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Index  
part number, 9-8  
Service Kit, 4-5  
specs, 12-56  
part location, 9-13  
part number, 9-12  
A38  
adjustments, 7-2  
AF Generator  
theory, 14-9  
theory, 14-11  
part location, 9-13  
part number, 9-12  
A4  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
specs, 12-8  
AF_DIAGS  
theory, 15-3  
AGC Closed Loop (At AM Output) Test  
theory, 15-10  
AGC Open Loop (At AM Output) Test  
theory, 15-10  
AGC Open-Loop Drive DAC Test  
theory, 15-10  
AGC Reference DAC Test  
theory, 15-10  
All Receiver Mixer Removal, 8-10  
AM Demodulator Test  
theory, 15-10  
Assembly and Disassembly Procedures,  
8-2  
A27 DAC/Upconverter  
diagnostics, 15-5  
A28  
part location, 9-9  
part number, 9-8, 9-10  
specs, 12-58  
A28 Power Supply Removal, 8-20  
A29  
part location, 9-13  
part number, 9-12  
A3  
theory, 14-14  
A4 Modulation Distribution  
diagnostics, 15-3  
A5  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
specs, 12-10  
part number, 9-6  
Service Kit, 4-5  
specs, 12-5  
theory, 14-7  
theory, 14-9  
Audio Analyzer  
A3 Audio Analyzer 1  
diagnostics, 15-4  
A31  
A5 Premod Filter and NSM  
diagnostics, 15-5  
A6  
theory, 14-4  
Audio Analyzer 1  
Service Kit, 4-5  
part location, 9-13  
part number, 9-12  
theory, 14-17  
A32  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
specs, 12-13  
specs, 12-5  
theory, 14-7  
Audio Analyzer 1 External Paths  
theory, 15-4  
part location, 9-13  
part number, 9-12  
theory, 14-17  
A33  
theory, 14-14  
Audio Analyzer 1 Internal Paths  
theory, 15-4  
Audio Analyzer 2  
Service Kit, 4-5  
A6 Signaling Source/Analyzer  
diagnostics, 15-3  
A7  
part location, 9-13  
part number, 9-12  
Service Kit, 4-5  
specs, 12-59  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
theory, 14-18  
specs, 12-3  
theory, 14-7, 15-4  
Audio Frequency Generators 1 and 2  
theory, 15-3  
theory, 14-18  
A34  
part location, 9-13  
part number, 9-12  
theory, 14-17  
A35  
part location, 9-13  
part number, 9-12  
theory, 14-15, 14-17  
A36  
part location, 9-13  
part number, 9-12  
theory, 14-15, 14-16  
A37  
troubleshooting, 5-2  
A7 Step Loop B  
theory, 14-5  
Autorange Attenuator  
theory, 15-8  
Aux RF Out to Aux RF In  
theory, 15-11  
A8  
part location, 9-7  
Service Kit, 4-5  
troubleshooting, 5-2  
A9  
part location, 9-7  
part number, 9-6  
Service Kit, 4-5  
specs, 12-15  
B
Bandwidth Control  
theory, 15-7  
BIT ERROR  
theory, 16-2  
Block Diagram 1  
theory, 14-4  
theory, 14-6  
Adjustments, 9-1  
Block Diagram 2  
Index-2  
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Index  
theory, 14-9  
Block Diagram 3  
theory, 14-15  
Block Diagram 4  
theory, 14-17  
Detector Output  
theory, 15-9  
Detector Output Level  
theory, 15-5  
Differentially Encoded  
theory, 14-10  
Display  
specs, 12-15  
theory, 14-6  
GMSK, 14-2  
theory, 14-6, 14-9  
GPIB Interface  
troubleshooting, 5-2  
GSM, 14-2  
Block diagram 5  
theory, 14-18  
Block Diagram Theory of Operation, 14-  
troubleshooting, 5-2, 5-5  
theory, 17-2  
2
Down Converters (With Spectrum GSM Controller  
block diagrams, 13-2  
Analyzer) Test  
theory, 15-10  
DSP ANL  
theory, 14-17  
GSM Phase 2, 17-4  
GSM RTI Assembly  
theory, 14-17  
GSM Timing  
Service Kit, 4-5  
GSM900, 17-4  
C
theory, 14-6, 16-2, 16-3  
calibration data, 8-2  
Calibration Lost, 14-9  
calibrations, 7-2  
Carrier Level DAC  
theory, 15-6  
CODEC Assembly  
theory, 14-17  
Controller  
Service Kit, 4-5  
troubleshooting, 5-2  
controller  
theory, 14-18  
counter  
E
E-GSM, 17-4  
error message, 14-9  
error messages, 11-2  
Ext Reference Lock Detector  
theory, 15-11  
Ext Reference Present Detector  
theory, 15-11  
H
High Power Attenuator  
theory, 14-4, 14-13  
Hop Controller  
specs, 12-59  
theory, 14-18  
External Reference  
theory, 15-11  
troubleshooting, 5-2  
Hop controller  
theory, 14-18  
Counter With ECL Dividers  
theory, 15-8  
Counter With TTL Dividers  
theory, 15-8  
CRT Driver  
troubleshooting, 5-2  
CRT Drives  
Service Kit, 4-5  
CW MEAS/AF ANALYZER, 16-4  
CW MEAS/AF ANL  
theory, 16-2  
Service Kit, 4-5  
F
HP/Agilent 83201A Service Kit, 4-1  
HP/Agilent 8922B  
diagnostics, 2-7  
theory, 14-15  
HP/Agilent 8922G  
theory, 14-17  
HP/Agilent 8922M Memory Upgrade, 9-  
29  
HP/Agilent 8922S Memory Upgrade, 9-  
29  
FIFO/GPIO  
theory, 14-15  
Filter Output Detector, Signal Present  
theory, 15-8  
Filter Rejection  
theory, 15-9  
Filter Tune DAC  
theory, 15-6  
Firmware Location, 9-29  
Flash Upgrades, 9-29  
FM Demodulator Test  
theory, 15-10  
Frequency Reference, 14-9  
fuse, 6-5  
fuse board, 6-7  
I
D
IF Bandwidth  
theory, 15-9  
IF Counter Test  
theory, 15-10  
Input  
theory, 14-4, 14-13  
Input (A,B,E,F,G,H)  
specs, 12-43  
DAC and Up-Converter  
theory, 15-5  
DAC/Upconverter  
Service Kit, 4-5  
specs, 12-56  
theory, 14-11  
DCS1800, 17-4  
DCS1900, 17-4  
fuseboard, 6-7  
G
Global Test and Demod  
Service Kit, 4-5  
Input (M,S)  
Index-3  
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Index  
specs, 12-47  
Input Section  
theory, 15-7  
Power Supplies and Amplifier Bias  
theory, 15-6  
Power Supply  
specs, 12-58  
Power Switch, 6-6  
Power-up, 1-3  
Preliminary Audio Paths  
theory, 15-3  
Premod Filter and NSM  
Service Kit, 4-5  
Premod filter and NSM, 14-9  
Premodulation Filter and NSM  
specs, 12-10  
Pre-Modulation Filter Clock Detector  
State  
theory, 15-5  
Protocol Interface (Option 003  
theory, 14-17  
PULSE  
theory, 16-2, 16-3  
Pulse Attenuator  
theory, 14-13  
Pulse Attenuator and Drive  
theory, 15-7  
Pulse Attenuator and Drive Test  
theory, 15-7  
Pulse Driver  
O
Open Loop ALC Drive  
theory, 15-7  
Option 001, 7-4  
theory, 14-9  
Option 003  
theory, 14-17  
oscillator, 14-9  
oscilloscope  
theory, 14-18  
OUT RF SP  
theory, 16-2, 16-3  
Output  
Service Kit, 4-5  
specs, 12-22  
theory, 14-12  
Output Detector, Detector Caps  
theory, 15-7  
Output Detector, Low Level  
theory, 15-7  
Output Filter Rejection  
theory, 15-8  
Output Frequency Range, Loop Closed  
theory, 15-7  
Output Section  
theory, 15-6  
Output Variable Attenuator  
theory, 15-8  
Instrument Block Diagrams, 13-2  
K
Keyboard  
troubleshooting, 5-2, 5-6  
L
line cord, 6-3  
Line Fuse, 6-5  
line module, 6-5  
Line Voltage, 6-5  
Loop B Output Detector  
theory, 15-9  
M
Measurement  
Service Kit, 4-5  
specs, 12-38  
theory, 14-18  
Memory  
Service Kit, 4-5  
memory card, 8-2  
diagnostics, 2-1  
Modulation Distribution  
Service Kit, 4-5  
specs, 12-8  
theory, 14-14  
Modulation Distribution External Paths  
theory, 15-3  
specs, 12-24  
R
P
Receiver  
Service Kit, 4-5  
specs, 12-32  
theory, 14-6, 15-9  
Receiver Mixer  
specs, 12-19  
theory, 14-5  
Reference  
Service Kit, 4-5  
specs, 12-26  
theory, 15-5  
Replacing a Part, 9-1  
RF Analyzer  
theory, 14-4  
RF Analyzer Loop 1 MHz Reference  
Detector  
theory, 15-9  
Parallel Bus  
troubleshooting, 5-3  
Parallel bus  
troubleshooting, 5-2  
parallel bus  
theory, 14-18  
PCN, 14-2, 17-4  
PCS, 17-4  
PCS1900, 17-4  
performance tests, 3-1  
performance verification, 3-1  
periodic calibration, 7-2  
periodic maintenance, 7-2  
Power Supplies  
specs, 12-53  
Modulation Distribution Internal Paths  
theory, 15-3  
Module I/O Specs, 12-2  
MS_DIAGS  
theory, 15-11  
N
NSM  
theory, 14-10  
NSM and Pre-Modulation Filter  
theory, 15-5  
NSM Clock Detector State  
theory, 15-5  
Power supplies  
specs, 12-50  
Index-4  
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Index  
RF Analyzer Loop Lock Detector  
theory, 15-9  
RF Analyzer Step Loop  
theory, 15-8  
theory, 14-18  
verifying performance, 3-1  
Voltmeter  
theory, 14-18  
Service Screen, 10-2  
Signaling Source/Analyzer  
Service Kit, 4-5  
RF Detectors 1  
specs, 12-13  
theory, 15-8  
theory, 14-14  
RF Detectors 2  
SPEC ANL  
theory, 15-8  
RF Generator  
theory, 14-9  
RF Generator Loop 1 MHz Reference  
Detector  
theory, 16-2, 16-4  
Special Option H03, 14-17  
Spectrum Analyzer  
Service Kit, 4-5  
specs, 12-36  
theory, 15-6  
RF Generator Loop Lock Detector State  
theory, 15-6  
theory, 14-4, 14-7, 15-9  
Step Attenuator  
theory, 15-8  
RF Generator Loop Output Detector  
theory, 15-6  
Step Loop A  
Service Kit, 4-5  
RF Generator Step Loop  
theory, 15-6  
theory, 14-11  
Step Loop A Assembly (A26), 7-5  
RF Generator Sum Loop Lock Detector Step Loop B  
State  
theory, 15-6  
Service Kit, 4-5  
theory, 14-11  
RF Generator Sum Loop VCO Tuning Stepped Gain  
Level  
theory, 15-9  
theory, 15-6  
Sum Loop  
RF In/Out to Aux RF Out Test  
theory, 15-11  
RF Input Signal  
theory, 15-9  
theory, 14-12, 15-6  
Sum Loop Assembly (A25), 7-5  
Summ Loop  
Service Kit, 4-5  
RF Input/Output  
theory, 15-11  
RF_DIAGS  
T
Temperature Sensor  
theory, 15-8  
Temperature Test  
theory, 15-5  
Running Memory Card Diagnostics, 2-1,  
2-3  
theory, 15-10  
theory of Operation, 14-2  
Timebase Adjustments, 7-2  
Top and Bottom Cover Removal, 8-3  
torque, 8-2  
Tracking Filter Rejection  
theory, 15-7  
S
SCOPE  
theory, 16-2, 16-4  
self-tests, 11-2  
Sequence Controller  
theory, 14-16  
Serial Bus  
Transfomer, 6-6  
Transformer, 6-6  
troubleshooting, 5-2  
Serial bus  
troubleshooting, 5-3  
serial bus  
V
Variable Gain IF Amplifier  
theory, 15-9  
Index-5  
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Index  
Index-6  
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