097-58502-01
Issue 1: Mar 00
58502A
Broadband Distribution
Amplifier
User’s Guide
Copyright © 2000 Symmetricom, Inc. All rights reserved. Printed in U.S.A.
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Contents
Connecting a Terminal or Computer to the 58502A 1-5
®
®
Windows 95-Based PC 1-7
®
PC 1-8
Powering Up the Distribution Amplifier 1-9
Using Commands to Control Key Functions (Examples) 1-11
Signals 1-13
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Contents
58502A Performance Test Record
(Page 1 of 2) 2-14
58502A Performance Test Record
(Page 2 of 2) 2-15
58502A Calibration (Option 010 Only) 2-16
ALARM/STATUS Port 3-4
Power Indicator 3-6
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Contents
Alarm Indicator 3-6
Input A and B Indicators 3-6
OUTPUT STATUS 1-12 Indicators 3-6
Serial Interface Ports 3-7
RS-232 Port 3-7
RS-232 Port Configuration 3-7
Connecting a Terminal or Computer 3-9
To Connect a Terminal or Computer to the 58502A 3-9
Different Ways to Check Alarm Status 3-11
Configuring the Inputs 3-11
To Configure One Input Operation 3-11
To Configure Two-Input Operation 3-11
To Configure the Internal Oscillator as a Backup
(Option 010) 3-12
To Configure the Internal Oscillator as the Only Source Input
(Option 010) 3-12
Only) 4-9
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Contents
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In This Guide
This preface contains the following information:
page vii
page viii
• Manuals
page ix
page ix
Guide Organization
Table of Contents
Chapter 1, “Getting Started,” provides an overview of the 58502A
Broadband Distribution Amplifier’s indicators, connectors, inputs, and
outputs. This chapter also provides installation, power-up instructions,
and sample commands to familiarize you with the 58502A.
Chapter 2, “Performance Tests,” provides procedures that verify the
58502A operates properly and meets its electrical performance
specifications. Electrical performance is tested against the
specifications listed in Chapter 7, “Specifications,” of this guide.
Chapter 3, “Guide Organization,” provides information on 58502A
features and functions, and how to connect it to computers.
Chapter 4, “Command Reference,” lists and describes the Standard
Commands for Programmable Instruments (SCPI) commands used to
monitor, set, or change parameters of the 58502A.
Chapter 5, “Functional Description,” provides a brief, simplified,
block-diagram description of how the instrument works.
Chapter 6, “Service,” provides information for calibration and
troubleshooting to determine if the product should be returned for
repair.
Chapter 7, “Specifications,” lists all of the 58502A’s specifications
and characteristics.
Index
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In This Guide
Description of the 58502A Broadband
Distribution Amplifier
Overview
The 58502A is a 1-to-12 Broadband Distribution Amplifier that is used
to distribute precision sine wave signals from Cesium, Rubidium,
quartz, or GPS frequency standards. It provides 12 outputs of the
source frequency, which can range from 100 kHz to 10 MHz, and is
designed for site frequency distribution for manufacturing, R&D, and
standards lab environments.
In addition, the 58502A may be used as a standalone precision signal
source by operating only from its optional internal oscillator.
The 58502A Broadband Distribution Amplifier has low signal
distortion and very high isolation between output channels
(OUTPUTS 1-12). Low output phase noise also helps maintain the
spectral purity of the source input signal, entering the 58502A through
the INPUTS A or B channel.
Auto-Switching and Alarm-Inputs Features
The 58502A has two features that ensure your critical frequencies are
always present. First, there is the auto-switching feature. When the
58502A detects one of its inputs is removed or the amplitude of the
input is greatly reduced, it will automatically switch to the other input.
Second, there is the alarm-inputs feature. The 58502A is compatible
with the alarm signals from the 58503A GPS Time and Frequency
Reference Receiver and the 5071A Primary Frequency Standard. If the
alarm of one of these sources is active, the 58502A switches to the
other input source, and it can reflect the alarm in its own alarm
outputs and route this information to the ALARM/STATUS port.
Auto switching between two inputs ensures continuous availability of
critical frequencies, and a fault alarm is activated when the system is
not functioning correctly.
The auto-switching and alarm-inputs features can also be monitored
and controlled through the RS-232 serial interface port.
viii
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In This Guide
RS-232C Port and Indicators Features
Querying through the RS232 serial interface port and viewing the
front-panel LEDs or indicators facilitate monitoring the system.
Registers within the 58502A allow you to query, through the RS232
interface port, the individual distribution input and output channels
for the presence or absence of a signal. Front-panel status indicators
provide you with a quick visual indication of individual channel health.
Accessories Supplied and Available
Supplied
• Power cord, 180 cm (6 ft.) detachable
Manuals
• 58502A Distribution Amplifier User’s Guide — this guide
(part number 097-58502-01)
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In This Guide
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Chapter 1 Getting Started
58502A Broadband Distribution Amplifier at a Glance
NOTE
the items described below.
1 When the Power indicator lights, it 6 RS232 serial interface port allows
indicates that the proper input
power is supplied to the 58502A.
you to remotely control and monitor
the 58502A. Its communication
language is SCPI. The connector is
a DTE configuration DE-9P (male).
2 When the Alarm indicator lights, it
indicates that operation is no
longer normal. One or more outputs
are at fault, or input signals are
absent at both inputs A and B.
7 ALARM/STATUS port is a DE-9P (male)
connector. This port allows you to
receive an alarm or input an alarm.
8 OUTPUTS 1-12 50Ω BNC output signal
3 When the Input A or B indicator
lights, it indicates that an input
signal is present at input A or B.
ports.
9 INPUTS A and B 50Ω BNC ports allow
two input signal connections to the
58502A. The internal circuitry
selects one of these signals for
distribution.
4 When any of the OUTPUT STATUS
1-12 indicators light, it indicates the
associated output is functioning.
5 AC Input power jack.
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Chapter 1 Getting Started
Preparing the Distribution Amplifier for Use
Preparing the Distribution Amplifier for
Use
To Mount the 58502A Into an Equipment Rack (Using
Option AX4)
1 Position the 58502A on your work surface with the front panel facing
you.
number 58502-00004, with its four mounting holes aligned with the
four holes present on the 58502A front side. Note that you may select
the four bracket holes appropriate for either a flush or protruding
installation.
The angle brackets are provide in the Option AX4 Rack Mount Kit.
12
11
S
U
T
10
A
T
9
S
T
U
8
P
T
7
U
O
5
6
3
4
2
1
58502A
DISTRIBUTION AMPLIFIER
S
U
T
A
T
1
S
Input
B
M
E
T
S
Y
Input
A
S
Alarm
Power
2
Figure 1-1. Attaching Mounting Brackets for Equipment Rack
®
3 Attach the bracket to the instrument using four T-15 TORX screws
(2), part number 0515-0380. These screws are provided in the
Option AX4 Rack Mount Kit.
4 Repeat steps 1 through 3 to attach a bracket to the other side of the
instrument.
5 Place the instrument in the position it will occupy in the equipment
rack (providing support as required while attaching the mounting
hardware). Secure the instrument to the rack with the appropriate
hardware.
1-4
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Chapter 1 Getting Started
Connecting a Terminal or Computer to the 58502A
To Connect AC Power
The nominal ac input range is 100-132, 175-240 Vac, 47-63 Hz, 40 VA.
The power module or jack senses the incoming voltage and
automatically selects the proper setup. Just connect the proper ac
power using the supplied power cord.
Connecting a Terminal or Computer to the
58502A
NOTE
You may skip this section if you do not plan to use a terminal or
computer; proceed to the power-up procedure, starting on page 1-9. The
58502A may be operated without a terminal or computer. The
computer is needed for you to remotely monitor the status of the
58502A and to change setup parameters.
1 If you are going to communicate with the 58502A using a terminal or
PC (personal computer), connect the computer to the rear-panel RS232
port using an HP 24542U interface cable (or equivalent RS-232 null-
modem cable with DE-9S female connectors at each end) as shown in
Terminal or PC
HP 24542U or
F1047-80002
or equivalent
58502A
Distribution
Amplifier
Interface
cable
(DTE)
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
40 VA Max
!
!
!
5VRMS MAX
RS232
Figure 1-2. Connecting a PC or Terminal to the 58502A
2 Turn the terminal or computer on.
If you are using a personal computer (PC), you will need to run a
terminal emulation or telecommunication program on your PC in order
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Chapter 1 Getting Started
Connecting a Terminal or Computer to the 58502A
to communicate via the RS-232 serial port. Most PCs contain a
terminal emulation program, especially PCs equipped with Windows.
If your PC does not contain a telecommunication program, purchase
one of the following programs: PROCOMM PLUS (DATASTORM
Technologies, Inc.®), PROCOMM PLUS for Windows, Cross Talk
(Hayes®), or any other terminal emulation program.
®
®
3 If you are using an NT 4.0-based or Windows 95-based PC, perform
the procedure in the subsection “To Configure Terminal
OR
®
If you are using a Windows -based PC, perform the procedure in the
1-6
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Chapter 1 Getting Started
Connecting a Terminal or Computer to the 58502A
To Configure Terminal Communications for
NT 4.0®/Windows® 95-Based PC
1 In the NT (or Windows 95) main window, click the Start button then
select Programs.
2 Select Accessories, Hyperterminal, and Hyper Terminal.
The Connection Description dialog box is displayed.
3 In the “Name” window, type 58502A (for example), select one of the icons
(the first one will do), then click OK.
The Connect To dialog box is displayed.
4 In the “Connect using” window, select the appropriate port or
connector (COM1 or COM2), then click OK.
The COM1 (or COM2) Properties dialog box is displayed. This dialog
box allows you to configure the RS-232 port of your PC.
5 Set the RS-232 port of your PC to match the following default values:
Baud rate (Bits per second): 9600
Parity:
None
8
Data bits:
Stop bits:
1
Pace (flow control):
None
NOTE
The RS-232 port configurations of the 58502A and the PC must be the
same for communications between the two. If the 58502A is being
powered up for the first time, set your PC to match the factory default
values listed above.
If an error-number prompt (E-xxx>) or no scpi> prompt is displayed
after pressing Return (or Enter) on your PC, the default values of the
58502A have been modified. See the subsections “Making Changes to
6 Click OK.
7 Next, perform the power-up procedure described in the section
“Powering Up the Distribution Amplifier” on page 1-9.
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Chapter 1 Getting Started
Connecting a Terminal or Computer to the 58502A
To Configure Terminal Communications for
Windows®-Based PC
1 Select or double click on the Terminal icon (a picture of a PC with a
telephone in front of it) in the Accessories window.
2 Select Settings, then choose Communications.
A dialog box is displayed that allows you to configure your PC.
3 Set the RS-232 port of your PC to match the following default values:
Pace:
None
Baud Rate: 9600
Parity:
None
Data Bits:
Stop Bits:
8
1
NOTE
what to do if the factory-default values of the 58502A’s RS-232 port
have been changed.
4 In the Communications dialog box, be sure to select the appropriate
port or connector (COM1, for example).
5 Next, perform the power-up procedure described in the section
“Powering Up the Distribution Amplifier” on page 1-9.
1-8
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Chapter 1 Getting Started
Powering Up the Distribution Amplifier
Powering Up the Distribution Amplifier
Overview of the Power-Up Procedure (What to
Expect)
When you power up the 58502A Distribution Amplifier for the first
time, you should expect it to run through the following sequence:
• front-panel Alarm indicator momentarily flashes, indicating the
unit is going through self-test, and
• enters steady-state operation, acting as a twelve-channel
distribution amplifier.
To Power Up the Distribution Amplifier
NOTE
The 58502A may be operated without a terminal or computer. The
computer is needed for you to remotely monitor the status of the
58502A and to change setup parameters.
optional), connect the 58502A’s outputs as required for your
application, and provide at least one input at either the input A or B
rear-panel input connector.
NOTE
Without 50Ω termination of the outputs, the front-panel OUTPUT
STATUS indicators may not operate properly because the amplitude of
the output signals may not be within specifications.
Functions,” for information on connection and operation for your
chosen application.
2 If you are using the Distribution Amplifier with a terminal, personal
computer (PC) see the section “Connecting a Terminal or Computer to
the 58502A” starting on page 1-5.
3 Apply the proper power source to the rear-panel AC input jack of the
Distribution Amplifier. (See the subsection “To Connect AC Power” on
If an input signal is connected to either input A or B, the 58502A
should now be distributing the input signal to all 12 output ports.
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Chapter 1 Getting Started
Powering Up the Distribution Amplifier
Terminal or PC
HP 24542U,
F1047-80002
or equivalent
Interface
cable
Outputs
to System
(DTE)
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
!
40 VA Max
!
!
5VRMS MAX
Input (s)
58502A
Distribution
Amplifier
RS232
Port
(DTE)
Figure 1-3. Inputs and Outputs Connections For Your System
(Terminal or PC is Optional)
1-10
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Chapter 1 Getting Started
Using Commands to Control Key Functions (Examples)
Using Commands to Control Key Functions
(Examples)
Overview
This section provides you with specific program command examples
that perform particular tasks. Enter the examples at the scpi> prompt
exactly as they appear to avoid creating an error.
If you accidentally make a mistake:
• enter the *CLS command to clear the error queue, then
• re-enter the correct command string at the scpi> prompt.
There are four types of signal distribution that can be used with the
58502A:
• Distribution of one input (A or B)
• Distribution of two inputs (A and B)
• Distribution of input A with internal backup oscillator (OCXO)
• Distribution of the internal backup oscillator (OCXO) only
Each of the above require a different set of commands to be used with
this instrument. See the subsection “Setup Commands for the
There are tasks that are common to all distribution applications. These
are:
• Checking the Output Channels Status
• Changing the RS-232 Serial Port Characteristics
The example commands to perform these tasks are described in the
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Chapter 1 Getting Started
Using Commands to Control Key Functions (Examples)
Setup Commands for the Different Distribution
Applications
Distributing One Input Signal (A or B)
To determine which input channel is active:
enter INP:A:QUES?, and press Return,
or
enter INP:B:QUES?, and press Return.
If 0 is returned, input signal is present. If 1 is returned, input signal is
absent. The 58502A will distribute the one signal present regardless of
which input channel is used.
Distributing Two Input Signals (A and B)
To Check the Input A Channel Signal Status
Enter INP:A:QUES?, and press Return.
If 0 is returned, input signal is present. If 1 is returned, input signal is
absent.
To Check the Input B Channel Signal Status
Enter INP:B:QUES?, and press Return.
If 0 is returned, input signal is present. If 1 is returned, input signal is
absent.
To Select the Input A Channel
Enter INP:SEL A, and press Return.
Enables the A input. Use the query form INP:SEL? to see which input
channel is currently in use.
To Select the Input B Channel
Enter INP:SEL B, and press Return.
Enables the B input. Use the query form INP:SEL? to see which input
channel is currently in use.
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Chapter 1 Getting Started
Using Commands to Control Key Functions (Examples)
To Check the Input Channel Automatic Switching Status
Enter INP:SEL:AUTO?, and press Return.
If 0 is returned, automatic switching is disabled. If 1 is returned,
automatic switching is enabled.
To Enable the Input Channel Automatic Switching
Enter INP:SEL:AUTO 1, and press Return.
To Disable the Input Channel Automatic Switching
Enter INP:SEL:AUTO 0, and press Return.
Distributing Input A and Backup Oscillator (Option 010)
Signals
To Check the Input A Channel Signal Status
Enter INP:A:QUES?, and press Return.
If 0 is returned, input signal is present. If 1 is returned, input signal is
absent.
To Verify that the Internal Oscillator (Option 010) is Producing 10 MHz
Enter ROSC:QUES?, and press Return.
If 0 is returned, oscillator output is normal. If 1 is returned, oscillator
output is questionable.
To Check the Input Channel Automatic Switching Status
Enter INP:SEL:AUTO?, and press Return.
If 0 is returned, automatic switching is disabled. If 1 is returned,
automatic switching is enabled.
To Enable the Input Channel Automatic Switching
Enter INP:SEL:AUTO 1, and press Return.
To Disable the Input Channel Automatic Switching
Enter INP:SEL:AUTO 0, and press Return.
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Chapter 1 Getting Started
Using Commands to Control Key Functions (Examples)
Distributing of the Backup Oscillator (Option 010) Signal
Only
Just apply ac power to the 58502A. After powerup, allow the oscillator
to warm up for 5 minutes before using the signal. You do not have to
send a command. The oscillator will provide the output signals.
Commands That Are Common to All Distribution
Applications
Checking the Output Channels Status
To Use Unpacked Integer to Check Output Channels
Enter OUTP:QUES:UNP?, and press Return.
A string of 12 digits, consisting of 0s and 1s, is returned. The leftmost
digit designates channel 1 and the rightmost digit stands for channel
12. A 0 indicates that the associated output is functional, while a 1
indicates an output fault. For example, the following string indicates
that channels 2 and 7 are not functioning - 0,1,0,0,0,0,1,0,0,0,0,0.
To Use Packed Integer to Check Output Channels
Enter OUTP:QUES:PACK?, and press Return.
An array of Boolean returns. The returned string provides status on
each 10 MHz output in a single packed integer. Each bit is associated
with an output channel. The least significant bit = chan 1, next bit =
chan 2, and so on. If a bit is 0, the output signal is present. Hence, a
value of 0 shows indicates that all outputs are functioning. If there was
no output from channels 2 and 3, the response would be:
6 (1*0 + 2*1 + 4*1 + 8*0 + ... = 6).
To Check the Alarm Status
Enter ALAR?, and press Return.
If 0 is returned, alarm is off. If 1 is returned, alarm is on.
To Check for Serial-Port Errors
Enter SYST:ERR?, and press Return.
An integer and quoted string are returned. The first parameter is the
error number and the quoted string is the error description.
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Chapter 1 Getting Started
Using Commands to Control Key Functions (Examples)
To Check Instrument Identification
Enter *IDN?, and press Return.
A quoted identification string is returned, similar to the following:
HEWLETT-PACKARD, 58502A,3426A–00123,3422 – A
To Clear the Error Queue
Enter *CLS, and press Return.
The error message disappears and the scpi> prompt returns.
Changing the RS-232 Serial Port Characteristics
Refer to the subsections “Making Changes to the Serial Port Settings
(If Needed)” and “Determining the Serial Port Settings” on page 3-8 in
commands. Always remember to make corresponding changes to your
PC serial-port parameters after changing the instrument’s serial-port
characteristics.
At first power-on from the factory, serial-port settings are as follows:
• Full Duplex is ON (can be turned OFF)
• Baud rate is 9600 (can also be set to 1200, 2400, or 19200)
• Data bits is 8 (set by parity = None)
• Pace is NONE (can be changed to XON)
• Parity is NONE (can also be set to ODD or EVEN for 7 data bits)
If you need to change one of these, enter the desired parameters
appended to the following commands for the stated purpose.
To Turn Off Full-Duplex Communication
Enter SYST:COMM:SER:FDUP 0, and press Return.
To Turn On Full-Duplex Communication
Enter SYST:COMM:SER:FDUP 1, and press Return.
To Check If Full-Duplex Communication is On or Off
Enter SYST:COMM:SER:FDUP?, and press Return.
If 1 is returned, duplex is on. If 0 is returned, duplex is off.
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Chapter 1 Getting Started
Using Commands to Control Key Functions (Examples)
To Set Baud Rate, Pacing, Parity, and Data Bits
To set the baud rate, for example, to 19200, enter
SYST:COMM:SER:BAUD 19200 and press Return.
To set pacing, for example, to XON enter SYST:COMM:SER:PACE XON
and press Return.
To see how pacing is currently set, enter SYST:COMM:SER:PACE? and
press Return.
To set parity, for example, to ODD enter
SYST:COMM:SER:PARITY ODD and press Return.
To see what data bits are set, enter SYST:COMM:SER:BITS? and press
Return.
1-16
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2
Performance Tests
Verifying Specifications
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Chapter 2 Performance Tests
Introduction
Introduction
This chapter provides procedures to test the electrical performance of
characteristics for the 58502A Broadband Distribution Amplifier.
information useful to apply to the instrument by giving typical or
nominal, but non-warranted performance parameters.,” of this guide.
It also provides calibration procedures for the 58502A units that
contain the Option 010 Backup Oscillator.
Three types of testing are provided:
Operational Verification
The Operational Verification test is an abbreviated series of checks
that may be performed to give a high degree of confidence that the
instrument is operating properly without performing the Acceptance
Test. An operational verification is useful for incoming inspection and
after instrument repair.
Performance Tests
of the instrument.
Calibration (Option 010 Only)
The recommended 58502A calibration period is 12 months. You may
perform calibration more often to obtain greater accuracy. This is
dependent on the aging rate of the 58502A’s internal reference
oscillator and the amount of deviation from the frequency stability
needed for your application.
Test Record
The results of the Operational Verification, and Acceptance Test
should be recorded on a copy of the Acceptance Test Record, located at
the end of this chapter.
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Chapter 2 Performance Tests
Introduction
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Chapter 2 Performance Tests
Test Equipment Required
Test Equipment Required
Table 2-1. Recommended Test Equipment
*
Instrument
Required Characteristics
Recommended Model
Use
Signal Generator
Frequency Range: 100 kHz to 10 MHz HP 8663A (or equivalent) OV, P
Output Level: +6 to +16 dBm
Harmonic Distortion:<-30 dBc
Spurious Distortion:<-80 dBc
Digitizing
Frequency range: 100 kHz to 100 MHz HP 54600B (or equivalent) OV
Oscilloscope
Universal Counter
Frequency Range: 100 kHz to 100
MHz: >10 digits resolution @ 10 MHz
HP 53131A (or equivalent) C (for
Option 010
only)
10 MHz Reference
Source
10 MHz Reference Signal
Accuracy: 2 X 10-12
HP 5071A (or equivalent)
Any Model
C
Terminal or computer Communication software, RS-232
connection
OV, P, C
P
RMS Voltmeter
Accuracy: 2% at 3V Full Scale,
1 MHz
HP 3400B (or equivalent)
50Ω BNC
_____________________________
DTE-to-DTE 9-pin (f) to 9-pin (f)
_____________________________
HP 10100C (or equivalent) OV, P, C
HP 24542U (or equivalent) C
Feedthrough
RS-232 Interface
Cable
Type N-to-BNC
Connector
H P 1250-0780 (or
equivalent)
OV, P
50Ω BNC Coaxial
Cable (2)
RG-58, 12 meter, male-to-male
HP 10503A (or equivalent) OV, P, C
* C= Calibration (Option 010 only)
OV = Operational Verification
P = Performance Tests
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Chapter 2 Performance Tests
58502A Operational Verification
58502A Operational Verification
These following procedures check the standalone functionality of the
58502A Broadband Distribution Amplifier.
Equipment
• Signal Generator: HP 8663A
• Oscilloscope: HP 54600B
• 50Ω BNC Feedthrough: HP 10100C (Use the 50Ω feedthrough if you
are using the HP 54600B Oscilloscope; however, if you are not using
1
this scope DO NOT use the 50Ω feedthrough.)
• BNC Cables (1 meter, male-to-male)
CAUTION
Input amplitude at the 58502A input A or B connector must be below
5 Vrms (+27 dBm) or damage to the Amplifier will occur.
NOTE
If any of these verification procedures fail, try repeating them. If
failure still occurs, refer to Chapter 6, “Service,” in this guide for fault
determination and instructions on returning the defective unit for
repair.
Outputs (1-12) Verification
1 Apply power to the 58502A and verify successful completion of self-test
before proceeding to step 2. (See the subsection “To Connect AC Power”
on page 1-5 in Chapter 1 of this guide, if needed.)
NOTE
Once the 58502A Distribution Amplifier has powered on, all that is
required for operation is an input signal connected to either the
input A or B, located on the rear-panel.
2 Set the HP 8663A Signal Generator to the following conditions:
Frequency: 10 MHz
Wave type: Sinusoidal
Amplitude: +10 dBm
1
The HP 54600B scope has only 1 MΩ input impedance. It does not allow you to switch or set the
impedance to 50Ω.
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Chapter 2 Performance Tests
58502A Operational Verification
Generator output to the 58502A’s input A or B rear-panel input, and
connect oscilloscope Channel 1 to output 1 port of the 58502A.
HP 54600B
Oscilloscope
or equivalent
HP 8663A
Synthesized Signal Generator
or equivalent
Output
N-to-BNC
Connector
(1250-0780)
50Ω Feedthrough
BNC
Cable
(HP 10100C)
BNC Cable
Input
A or B
Outputs
1 - 12
58502A
Distribution
Amplifier
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
!
40 VA Max
!
!
5VRMS MAX
Figure 2-1. Operational Verification Setup
4 Verify that the front-panel Input A or B and all twelve OUTPUT
STATUS (1-12) output LEDs are illuminated.
5 Set the oscilloscope to the following:
Channel 1: 0.5 V/div
Timebase: 50 ns/div
6 Connect the oscilloscope to each of the rear-panel output ports in turn
to verify that the output signal is a nominal 1 V rms (2.8 Vp-p) sine
wave at 10 MHz.
7 Disconnect the signal from the 58502A rear-panel input connector.
8 Verify that all input and output LEDs are off.
This indicates loss of input and output.
9 Mark Pass or Fail in Line 1 on the Operational Verification portion of
the 58502A Performance Test Record, located on page 2-14.
2-6
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Chapter 2 Performance Tests
58502A Operational Verification
Alarm and Status Output Verification
test output. (Note that any one of the outputs can be used for this
alarm verification.)
HP 8663A
Sythesized Signal Generator
or equivalent
Output
N-to-BNC
BNC Cable
Connector
(1250-0780)
Input
A or B
58502A
Distribution
Amplifier
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
40 VA Max
!
!
!
5VRMS MAX
Figure 2-2. Alarm/Status Output Verification Setup
2 Verify the ALARM/STATUS output function by shorting to ground any
OUTPUTS
1
2
11
12
Figure 2-3. Output 12 Grounded
3 Observe that the front-panel Alarm indicator illuminates and the
ALARM/STATUS output pins (2, 3, and 4) go active (TTL low,
approximately 20 mV).
Figure 2-4 shows the output pins (2, 3, and 4) and ground pins (1, 5,
and 9.
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Chapter 2 Performance Tests
58502A Operational Verification
Outputs
GND
GND
1
2
3
4
5
6
7
8
9
GND
Figure 2-4. ALARM/STATUS Port
If the Alarm indicator illuminates and output pins 2, 3, and 4 go low,
then all associated ALARM/STATUS output circuitry is functional.
4 Mark Pass or Fail in Line 2 on the Operational Verification portion of
the 58502A Performance Test Record, located on page 2-14.
This completes the operational verification.
2-8
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Chapter 2 Performance Tests
58502A Operational Verification
RS-232 Verification (Optional)
NOTE
You may skip this verification if you do not plan to use the RS232 port.
1 Apply the proper power source to the rear-panel AC input jack of the
Distribution Amplifier.
2 If you are using the Distribution Amplifier with a Terminal or personal
computer (PC), connect it to the rear-panel RS232 port using an
HP 24542U interface cable (or equivalent RS-232 null-modem cable
with DE-9S female connectors at each end) as shown in Figure 2-5.
Terminal or PC
HP 24542U,
F1047-80002
or equivalent
Interface
cable
58502A
Distribution
Amplifier
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
!
40 VA Max
!
!
5VRMS MAX
RS232
Port
Figure 2-5. RS-232 Verification Setup
3 Turn on the PC or terminal.
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Chapter 2 Performance Tests
58502A Operational Verification
4 Set the RS-232 port of your PC to match the following default values:
Pace:NONE
Baud Rate: 9600
Parity: NONE
Data Bits: 8
Stops Bits: 1
If needed, see “Connecting a Terminal or Computer to the 58502A”
parameters.
a. Press Return (or Enter) key on the PC.
The scpi> prompt should be displayed.
b. At the prompt, type
*IDN?
c. Press Return.
This query returns the 58502A identification similar to the
following:
HEWLETT-PACKARD, 58502A,3426A–00123,3422 – A
5 Mark Pass or Fail in Line 3 on the Operational Verification portion of
the 58502A Performance Test Record, located on page 2-14.
2-10
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Chapter 2 Performance Tests
58502A Performance Tests
58502A Performance Tests
These tests verify the specified electrical performance of the 58502A
Distribution Amplifier. The tests do not require access to the inside of
the instrument and do not test typical specifications or supplementary
characteristics.
If the performance test is to be considered valid, the following
conditions must be met:
•
•
•
Instrument being tested is powered on and warmed up.
Tests are conducted as presented in this section.
Tests are conducted under normal operating conditions as stated in
•
Test equipment is selected according to the Table 2-1,
Equipment
• HP 8663A Signal Generator or equivalent
• HP 3400B RMS Voltmeter or equivalent
• 50Ω BNC Feedthrough: HP 10100C or equivalent (Use the 50Ω
feedthrough if you are using the HP 54600B Oscilloscope; however,
2
if you are not using this scope DO NOT use the 50Ω feedthrough.)
Input Level Response Tests
A 10 MHz signal is input to the 58502A from a signal generator. The
level of this signal is adjusted from +7 dBm to +15 dBm while the
twelve Outputs are verified for a 0.707 to 1.12 Vrms signal.
Specifications Tested:
58502A Input Ranges
Minimum Level
Maximum Level
+7 dBm
+15 dBm
58502A Outputs, 50Ω load
Output Level
+13 dBm +1 dB/−3dB
2
The HP 54600B scope has only 1 MΩ input impedance. It does not allow you to switch or set the
impedance to 50Ω.
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Chapter 2 Performance Tests
58502A Performance Tests
Test 1: +7 dBm Input Level
1 Apply power to the 58502A and observe successful completion of
self-test.
2 Set the signal generator to:
FREQUENCY: 10 MHz
LEVEL: +7 dBm
3 Connect the signal generator output to the 58502A input A or B rear-
panel input connector as shown in Figure 2-6.
4 Connect the RMS voltmeter via the 50Ω load to the 58502A Output 1
as shown in Figure 2-6.
HP 8663A
HP 3400B
Synthesized Signal Generator
RMS Voltmeter
or equivalent
or equivalent
Output
N-to-BNC
Connector
(1250-0780)
50Ω Feedthrough
BNC
Cable
(HP 10100C)
BNC Cable
Input
A or B
Outputs
1 - 12
58502A
Distribution
Amplifier
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
!
40 VA Max
!
!
5VRMS MAX
Figure 2-6. Input Level Response Test Setup
5 Set the RMS voltmeter to 3V Full Scale Range.
6 Starting with Output 1, verify that the RMS voltage on each of the
twelve Outputs is from 0.707 to 1.12 Vrms.
7
Record the reading of each output channel on the Performance Tests
portion of the 58502A Performance Test Record in the Test 1 section,
located on page 2-14.
2-12
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Chapter 2 Performance Tests
58502A Performance Tests
Test 2: +15 dBm Input Level
set to 3V Full Scale Range, adjust the signal generator to:
LEVEL: +15 dBm
2 Verify that the RMS voltage on each of the twelve Outputs is from
0.707 to 1.12 Vrms.
3 Record the reading of each output channel on the Performance Tests
portion of the 58502A Performance Test Record in the Test 2 section,
located on page 2-15.
This completes the performance tests.
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Chapter 2 Performance Tests
58502A Performance Test Record (Page 1 of 2)
58502A Performance Test Record
(Page 1 of 2)
Model 58502A
Broadband Distribution Amplifier
Serial Number:_______________________________ Repair/Work Order No.__________________
Test Performed By:___________________________ Temperature:___________________________
Date:________________________________________ Relative Humidity:______________________
Notes: ______________________________________________________________________________
Line Number
Operational Verification
Test Results
Pass
Fail
____
____
1
2
3
Outputs (1-12) Verification
Alarm/Status Verification
RS-232 Verification
____
____
____
____
58502A Performance Tests
Input Level Response Tests
Test 1: +7 dBm Input Level
Minimum
Actual Reading (Outputs 1 – 12)
Maximum
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
1. ________________________
2. ________________________
3. ________________________
4. ________________________
5. ________________________
6. ________________________
7. ________________________
8. ________________________
9. ________________________
10. _______________________
11. _______________________
12. _______________________
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
2-14
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Chapter 2 Performance Tests
58502A Performance Test Record (Page 2 of 2)
58502A Performance Test Record
(Page 2 of 2)
58502A Performance Tests (Continued)
Input Level Response Tests (Continued)
Test 2: +15 dBm Input Level
Minimum
Actual Reading (Outputs 1 – 12)
1. ________________________
2. ________________________
3. ________________________
4. ________________________
5. ________________________
6. ________________________
7. ________________________
8. ________________________
9. ________________________
10. _______________________
11. _______________________
12. _______________________
Maximum
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
0.707 Vrms <
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
< 1.12 Vrms
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Chapter 2 Performance Tests
58502A Calibration (Option 010 Only)
58502A Calibration (Option 010 Only)
This section provides procedures to perform routine periodic
calibration of the Option 010 Broadband Distribution Amplifier.
Overview
The following procedure uses software commands to calibrate the
oscillator.
NOTE
NOTE
The optional oscillator of the 58502A has a specified aging rate of
−10
−7
5 × 10
per day ( 1 × 10 /year). Refer to the specifications in
Chapter 7 to ensure that the 58502A oscillator has warmed up for a
sufficient period of time to make this adjustment.
When attempting to calibrate the 58502A with the SCPI software
commands, you will need to establish serial communication via a
terminal or PC.
Frequency adjustments can be made after determining the internal
oscillator frequency error of the 58502A. The basic 10 MHz oscillator
frequency can be adjusted as required to obtain the desired frequency
using the software, SCPI-based EFC adjust that has a control range of
−6
−12
2 × 10 maximum with a minimum resolution of 4 × 10
.
The software EFC control range is mapped onto a numerical range of
values as follows:
Minimum: 0
Maximum: 1,048,575 (220-1)
Mid-Range: 524,288
Default Step Size: 10,000
Minimum Step Size: 1
Maximum Step Size (LIMIT ON): 35,000
2-16
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Chapter 2 Performance Tests
58502A Calibration (Option 010 Only)
Equipment
• 10 MHz Primary Frequency or House Standard: HP 5071A (or
equivalent)
• Terminal or computer (PC): Any Model with communication
software and RS-232 connection
• HP 53131A Universal Counter (or equivalent)
• HP 24542U (or F1047-80002) (or equivalent) Serial Interface Cable
• HP 10100C 50Ω BNC Feedthrough (or equivalent)
• Two BNC Cables (1 meter, male-to-male)
Procedures
Determining Frequency Difference
The frequency difference is measured by synchronizing the frequency
counter with a known standard and observing the 58502A frequency
output to a resolution of at least 10 digits.
1 Connect 10 MHz reference to HP 53131A Universal Counter’s (or
equivalent) rear-panel external timebase (Reference) input as shown in
2 Connect any output of the 58502A to the Counter’s input as shown in
3 Set the Counter’s gate time to 1-second to display at least 10 digits
(10,000,000.000).
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Chapter 2 Performance Tests
58502A Calibration (Option 010 Only)
Ref. In
50Ω Feedthrough
(HP 10100C)
Port1
10 MHz External
Reference Out
BNC Cable
HP 53131A
Universal
Counter
HP 5071A
Primary Frequency
Standard or equivalent
or equivalent
Channel 1
BNC Cable
Terminal or PC
To any
available
Output
58502A
Distribution
Amplifier
HP 24542U
Interface
Outputs
1 - 12
cable
or equivalent
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
!
40 VA Max
!
!
5VRMS MAX
RS232C
Port
Figure 2-7. 58502A Calibration Setup
4 Observe Counter reading.
−
If difference from 10 MHz is <5 × 10 8 (0.5 Hz), then perform the
“Software Oscillator Adjustment” procedure below.
Software Oscillator Adjustment
1 Use the terminal and serial port to send the following SCPI command
to ascertain the EFC value currently applied:
DIAG:CAL:ROSC:EFC:ABS?
2-18
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Chapter 2 Performance Tests
58502A Calibration (Option 010 Only)
2 Use the terminal and serial port to send one of the following SCPI
commands to incrementally adjust the EFC control signal to bring the
oscillator frequency closer to 10 MHz:
DIAG:CAL:ROSC:EFC:ABS UP (or)
DIAG:CAL:ROSC:EFC:ABS DOWN
Where UP increases frequency and DOWN decreases frequency.
3 As you approach the proper frequency, change the step size to smaller
values by sending the following SCPI command:
DIAG:CAL:ROSC:EFC:ABS:STEP <value>
The default step size is 10,000. A recommended first reduction in size
should be to 1,000.
4 Continue to adjust UP or DOWN with finer increments until the
−
frequency output is 10 MHz <1 × 10 9 (0.01 Hz).
5 Record the date, EFC value, and frequency value on the Calibration
6 Return the EFC step size to its original value by sending the following
SCPI command:
DIAG:CAL:ROSC:EFC:ABS:STEP 10000
This completes the 58502A calibration.
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Chapter 2 Performance Tests
Calibration Record (Page 1 of 1)
Calibration Record (Page 1 of 1)
Model 58502A
Option 010 Broadband Distribution Amplifier
Serial Number: ___________________________ Repair/Work Order No. _________________
Test Performed By: _______________________ Temperature: __________________________
Date: _____________________________________ Relative Humidity: ____________________
Notes: ___________________________________________________________________________
Calibration Dates and Values
EFC Value
Frequency or Frequency Difference
Date
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
2-20
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Chapter 3 Features and Functions
Chapter Contents
Chapter Contents
You will find that this chapter makes it easy to look up all the details
about a particular feature of the 58502A Broadband Distribution
Amplifier.
This chapter is organized as follows:
• Inputs
– AC Input
– INPUTS A and B Ports
• Outputs
page 3-4
page 3-6
page 3-6
page 3-6
page 3-6
page 3-6
page 3-7
page 3-7
page 3-7
page 3-9
page 3-9
– OUTPUTS (1-12) Ports
– ALARM/STATUS Port
• Indicators
– Power Indicator
– Alarm Indicator
– Input A and B Indicators
– OUTPUT STATUS (1-12) Indicators
• Serial Interface Ports
– RS-232 Port
– RS-232 Configuration
• Connecting a Terminal or Computer
– To Connect a Terminal or Computer to the
58502A
• Different Ways to Check Alarm Status
• Configuring the Inputs
page 3-11
page 3-11
page 3-11
page 3-11
page 3-12
– To Configure One Input Operation
– To Configure Two-Input Operation
– To Configure the Internal Oscillator as a Backup
(Option 010) Input
– To Configure the Internal Oscillator as the Only
Source Input (Option 010)
page 3-12
3-2
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Chapter 3 Features and Functions
Inputs
Inputs
~AC Input
AC Input
This rear-panel ac power module or jack senses the incoming voltage
and automatically selects the proper setup. The nominal ac input range
is 100-132, 175-240 Vac, 47-63 Hz, 40 VA.
100-240 VAC 50/60GHz
!
40 VA Max
INPUTS A and B Ports
INPUTS
B
A
These rear-panel 50Ω BNC input connectors or ports allow two-input
signal connection to the 58502A. These ports will accept sinusoidal
signals, ranging from 100 kHz to 10 MHz with power level of +7 to
+15 dBm.
!
5VRMS MAX
These ports form a 2-to-1 auto-switch. When the 58502A detects that
one of its inputs is removed or the amplitude of the input is greatly
reduced, it will automatically switch to the other input. Thus, the
auto-switch feature ensure your critical frequencies are always
present.
Only one input is used at a time. Factory default is set to input A over
B if valid signals are present at both ports.
If input A signal goes away while there is a signal at input B, the
auto-switching feature automatically switches to using the input B
signal. However, if the input A signal returns, the 58502A will continue
to use the input B signal. It will not return to using the input A signal
until you send the SCPI commands INP:SEL A and INP:SEL:AUTO 1.
Outputs
OUTPUTS
1
2
11
12
OUTPUTS (1-12) Ports
These twelve 50Ω BNC, rear-panel connectors or ports allow
distribution of sinusoidal signals (ranging from 100 kHz to 10 MHz)
with very low phase noise and signal distortion. The isolated output
signals are derived from a single sine wave input signal, from input A
or B. The outputs have fixed and identical characteristics, and retain
the integrity (that is, frequency, amplitude, phase, etc.) of the input
signal. The state of each distributed output signal is communicated via
the front-panel indicators or LEDs, and can be monitored at the
ALARM/STATUS port.
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Chapter 3 Features and Functions
Outputs
ALARM/STATUS Port
ALARM/STATUS
RS232
This DE-9P (male) subminiature D connector or port allows you to
This port also allows you to receive compatible BITE (Built In Test
Equipment) alarm inputs from the 58503A GPS Time and Frequency
Reference Receiver and the HP 5071A Primary Frequency Standard
via pins 6 and 7.
The pin assignments are described in Table 3-1.
Table 3-1. ALARM/STATUS Port Pin Assignments
Pin
Signal
Description
Number
1, 5, 9
2, 3, 4
6, 7
GROUND
Signal return, ground potential.
ALARMS OUT
ALARMS IN
TTL
TTL
8
________________
Do not use or ground.
See the section “Different Ways to Check Alarm Status,” which
discusses three different ways you can check the alarm status of the
58502A.
ALARM/STATUS Port Outputs
The output pins (2, 3, and 4) of this port, shown in Figure 3-1, allow
you to monitor the status of the 58502A. Output pins 2, 3, and 4 are a
TTL high (3.5 Vdc, minimum) when operation is normal, and TTL low
(1.5 Vdc, maximum) if there is an alarm.
Alarm Outputs
ALARM/STATUS
1
2
3
4
5
6
7
8
9
Figure 3-1. Alarm Outputs
All of the output pins are at a TTL high when there is no alarm
condition. When an alarm condition exists, all of the output pins drop
to a TTL low. These outputs echo the state of front-panel Alarm
indicator.
3-4
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Chapter 3 Features and Functions
Outputs
ALARM/STATUS Port Inputs
pins are a TTL high (3.5 Vdc, minimum) when operation is normal, and
TTL low (1.5 Vdc, maximum) if there is an alarm.
ALARM/STATUS
1
2
3
4
5
6
7
8
9
Alarm Inputs
Figure 3-2. Alarm Inputs
Always connect the input A input device to pin 6 of the
ALARM/STATUS connector, and connect the input B input device to
pin 7. Do NOT use or ground pin 8.
When an alarm input from the device connected to input A is received
by the 58502A, the 58502A switches to using the backup signal
(input B) as the source signal, and automatically reflects the alarm in
its own alarm outputs and routes this information to pin 6 of the
ALARM/STATUS connector. Conversely, similar actions occur when an
alarm input from the device connected to input B is received by the
58502A, except the alarm information is routed to pin 7 of the
ALARM/STATUS connector.
The INP:ALARM? query returns the alarm status of frequency sources
details on this query.
The following paragraphs provide an example on how the alarm
system works.
Let’s say you connected the HP 5071A Primary Frequency Standard
signal to input A, and connected the 58503A GPS Receiver signal to
input B. Then you connected the HP 5071A status output to pin 6 of
the ALARM/STATUS port, and the 58503A alarm output to pin 7. (The
common or return for these signals should be connected to pin 9,
ground. You need to make a special cable for these connections.)
If the HP 5071A fails and sends an alarm, the 58502A will
automatically switch to the backup input signal from the 58503A on
input B. Using INP:ALARM? query would return 1,0,0, indicating that
the alarm occurred in the device connected to pin 6.
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Chapter 3 Features and Functions
Indicators
Indicators
SYSTEM STATUS
Power Alarm
Input
A
Input
B
Power Indicator
This indicator lights when the input power is supplied to the 58502A.
The indicator cannot be set or queried via the serial interface.
Alarm Indicator
This indicator lights when an alarm is detected in the distribution
system. Illumination of this indicator could mean that one or more
outputs are at fault, or an input signal is absent at both inputs A and
B, or the 58502A has received alarm signals from the external
precision frequency sources.
Input A and B Indicators
These indicators light when a sinusoidal input signal is present at
input A or B.
OUTPUT STATUS
OUTPUT STATUS 1-12 Indicators
1
2
3
4
5
6
7
8
9
10 11 12
These indicators light when the associated outputs are functioning.
3-6
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Chapter 3 Features and Functions
Serial Interface Ports
Serial Interface Ports
ALARM/STATUS
RS232
RS-232 Port
This 9-pin male subminiature D (DE-9P) rear-panel connector is a
RS-232 DTE configuration serial interface port. It allows serial
interface connection to an external computer for remote operations.
This serial interface port allows you to remotely control and monitor
the 58502A.
See the section “Connecting a Terminal or Computer” starting on
page 3-9 for information on interface cable use.
RS-232 Port Configuration
Software pacing, baud rate, parity, data bits, and stop bits parameters
default settings and the commands to send to change them.
Table 3-2. RS-232 Port Interface Factory Default Values and
Commands.
Parameter
Software Pacing
Baud Rate
Parity
Default
NONE
9600
NONE
8
Command
Possible Choices
XON or NONE
SYST:COMM:SER:PACE
SYST:COMM:SER:BAUD
SYST:COMM:SER:PAR
SYST:COMM:SER:BITS
No command exists
1200, 2400, 9600, or 19200
EVEN, ODD, or NONE
7 or 8
Data Bits
Stops Bits
Full Duplex
1
Fixed (no choices available)
ON or OFF
ON
SYST:COMM:SER:FDUP
Procedures for configuring the RS-232 ports are provided in the
following subsections.
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Chapter 3 Features and Functions
Serial Interface Ports
Making Changes to the Serial Port Settings (If Needed)
CAUTION
If you change the serial port settings, your changes will be
stored in the 58502A. Cycling power will not reset to factory
defaults. Therefore, if you make a change, it is recommended
that you record the settings and keep the record with the
58502A.
If you need to change the serial port settings, for example, to set
up for a different computer, use the guidelines given in this
section.
Serial port settings are changed by issuing commands.
It is recommended that you issue a single compound command which
simultaneously sets all the serial port parameters. Then connect the
other computer and begin using the instrument with the new settings.
NOTE
If you choose to set parameters one at a time, you will make the
procedure more difficult. That is, with each change, the instrument
will be updated, but your computer will retain its original settings.
At each step, you will have stopped serial communications and be
forced to modify your PC settings to match the 58502A in order to
continue. It is recommended that you make all changes in a single
compound command, verify the changes, and record all parameters.
The command line below would set the RS-232C port pacing to XON,
baud rate to 2400, and parity to EVEN.
SYST:COMM:SER:PACE XON; BAUD 2400; PARITY EVEN
Determining the Serial Port Settings
If you connect your PC, press Return, and do not get a scpi> prompt
back from the 58502A, your 58502A’s serial communication settings
may have been modified. You need to systematically step through the
data communication settings on your PC until your PC matches the
58502A. The 58502A cannot communicate its settings until this
process is complete.
Iterate until you are able to verify that settings on your PC match the
58502A.
When you are successful, you will have restored full RS-232
communications, enabling you to query the 58502A’s communication
settings. Once you establish communications with the serial port, you
can query the 58502A for settings of the port.
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Chapter 3 Features and Functions
Connecting a Terminal or Computer
Issue the following queries to the serial port to verify its configuration.
SYST:COMM:SER:PACE?
SYST:COMM:SER:BAUD?
SYST:COMM:SER:PARITY?
SYST:COMM:SER:BITS?
SYST:COMM:SER:SBITS?
Connecting a Terminal or Computer
To connect the 58502A to a terminal or computer, you must have the
proper interface cable. Most computers are DTE (Data Terminal
Equipment) devices. Since the 58502A is a DTE device, you must use a
DTE-to-DTE interface cable when connecting to a computer. These
cables are also called “null-modem” cables. The rear-panel RS232 port
is DTE.
The interface cable must also have the proper connector on each end
and the internal wiring must be correct. Connectors typically have
9 pins (DE-9 connector) or 25pins (DB-25 connector) with a “male” or
“female” pin configuration. A male (m) connector has pins inside the
connector shell and a female (f) connector has holes inside the
connector shell.
To simplify interface cable selections, the following subsections tell you
which cables to use.
To Connect a Terminal or Computer to the 58502A
Use an HP 24542U interface cable (or equivalent RS-232 null-modem
cable with DE-9S female connectors at each end) to connect the
58502A’s rear-panel RS232 port to a terminal or computer as shown in
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Chapter 3 Features and Functions
Connecting a Terminal or Computer
Terminal or PC
HP 24542U,
F1047-80002
or equivalent
Interface
cable
58502A
Distribution
Amplifier
(DTE)
1
2
3
4
5
6
7
8
9
10
11
12
A
B
100-240 VAC 50/60GHz
!
40 VA Max
!
!
5VRMS MAX
RS232
Port
(DTE)
Figure 3-3. Connecting a PC or Terminal to the 58502A
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Chapter 3 Features and Functions
Different Ways to Check Alarm Status
Different Ways to Check Alarm Status
The 58502A provides three ways to check its alarm status: visually
viewing the front-panel indicators, querying for status via the RS232
port, and monitoring the ALARM/STATUS port.
Configuring the Inputs
The 58502A Broadband Distribution Amplifier can be manually
operated, or operated with a computer or terminal for enhanced
features.
The 58502A can be manually operated in all four modes of operation as
described in the following paragraphs.
To Configure One Input Operation
Connect the input signal to either input A or B. The input signal will
appear on all twelve outputs.
To Configure Two-Input Operation
Connect the primary or preferred input signal to input A, and connect
the secondary input to input B. The input signal will appear on all
twelve outputs. If the primary input fails the 58502A will
automatically switch to input B, and the secondary input signal will
appear on all twelve outputs.
NOTE
If input A signal goes away while there is a signal at input B, the
auto-switching feature automatically switches to using the input B
signal. However, if the input A signal returns, the 58502A will
continue to use the input B signal. It will not return to using the
input A signal until you send the SCPI commands INP:SEL A and
INP:SEL:AUTO 1.
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Chapter 3 Features and Functions
Configuring the Inputs
To Configure the Internal Oscillator as a Backup
(Option 010)
Connect the input signal to input A . Then connect the 58502A to
ac power. The internal oscillator will provide the source signal for the
58502A only if input A signal fails. After powerup, allow the oscillator
to warm up for 5 minutes before using the signals.
To Configure the Internal Oscillator as the Only
Source Input (Option 010)
If the 58502 Distribution Amplifier contains the optional quartz
oscillator (Option 010), you only need to connect the 58502A to
ac power. The oscillator will provide the output signals. After powerup,
allow the oscillator to warm up for at least 5 minutes before using the
signals.
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Chapter 4 Command Reference
Chapter Contents
Chapter Contents
This chapter provides a description for each command that can be used
to operate the 58502A Broadband Distribution Amplifier.
This chapter is organized as follows:
• SCPI Conformance
– Command Syntax Conventions
– IEEE 488.2 Common Commands
• 58502A Command Summary
• System Status Reporting Commands
• Identification Command
(Option 010 Only)
• Input Ports Status and Setup Commands
• Serial Interface Communication Commands
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Chapter 4 Command Reference
SCPI Conformance Information
SCPI Conformance Information
The Standard Commands for Programmable Instruments (SCPI)
commands used in the 58502A are in conformance with the SCPI
Standard Version 1992.0.
Command Syntax Conventions
[ ]
An element inside brackets is optional. Note, the
brackets are NOT part of the command and
should not be sent to the instrument.
1 | 2
Means use either 1 or 2.
Means enter a number.
<numeric_value>
POSition
Means you MUST use either all the uppercase
letters or the entire word. The lowercase letters
are optional. For example, POS and POSITION
are both valid. However, POSI is not valid. (Note
POSition is used here as an example, but this
convention is true for all command keywords.) In
other words, the short form of the keywords is
shown in uppercase.
<n>
The notation <n> ending a command keyword
indicates a numeric suffix, used to differentiate
multiple instances of the same structure. The
numeric suffix is applied to both the short and
long forms. The valid range for the value n is
specified from an enumerated list, for example
[1|2|3], or from a range, for example [1..3] to in-
dicate any of the integers from 1 to 3.
"TSTamp 1"
When you see quotation marks in the command’s
parameter, you must send the quotation marks
with the command.
IEEE 488.2 Common Commands
The Common Commands are general purpose commands that are
common to all instruments (as defined in IEEE 488.2). Common
Commands are easy to recognize because they all begin with an
asterisk or star “*” (for example, *CLS, *IDN?). These commands are
generally not related to measurement configuration. They are used for
functions like clearing alarms or errors, identification, or setting alarm
enables.
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Chapter 4 Command Reference
58502A Command Summary
58502A Command Summary
Table 4-1 lists and briefly defines all of the commands that can be used
to operate the 58502A.
Table 4-1. 58502A Command Summary
Keyword/Syntax
*CLS
Parameters
Description
Clears error queue.
Returns identification string.
*IDN?
returns unquoted
string
:ALARm?
returns 0 or 1
0 = alarm is off, 1 = alarm is on. Alarm is on when any of the
outputs are not functional. (There may be additional internal
conditions that generate alarm.)
DIAGnostic
:CALibration
:ROSCillator
:EFC
Diagnostic Subsystem (USED WITH OPTION 010 ONLY)
Node Only
Node Only
Node Only
:ABSolute
Send:
<EFC value> or
UP or DOWN
Sets the absolute EFC (electronic frequency control) of the
oscillator. Use UP or DOWN to adjust the EFC by the increment
specified in the STEP command (see next command). For
example, if present EFC value is 1000 and STEP value is 13,
:EFC:ABS:UP will increase EFC value to 1013.
Query.
:ABSolute?
:STEP
returns:
<EFC value>
<EFC increment
value>
Increments the EFC value by this amount.
:STEP?
returns <EFC
Query.
increment value>
INPut
INPUT Subsystem
:A:QUEStionable? returns 0 or 1
Reports if there is a signal present on input A.
0 = signal present
1 = no signal present.
:B:QUEStionable? returns 0 or 1
Reports if there is a signal present on input B.
0 = signal present (not questionable),
1 = no signal present.
:ALARm?
:SELect
0,0,0 or 1,0,0 or
0,1,0
Reports the alarm status of devices connected to the input pins
(6, 7) of the ALARM/STATUS port.
0, 0,0 = no alarm exists.
1, 0,0 = alarm from input A devices connected to pin 6.
0,1, 0 = alarm from input B devices connected to pin 7.
A or B
4-4
Enables either Input A or Input B. Use the query form to see
which input is currently in use. This command also disables
auto-switching.
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Chapter 4 Command Reference
58502A Command Summary
Table 4-1. 58502A Command Summary (Continued)
Keyword/Syntax
INPut (Continued)
:AUTO
Parameters
Description
INPUT Subsystem (Continued)
append 0 or OFF, or Enables or disables the automatic input switching feature. 0 or
1 or ON
returns 0 or 1
OFF disables it while 1 or ON enables it. This setting is stored
in non-volatile memory.
Query.
:AUTO?
:DEFault
A or B
Selects the default input channel (or port) to be used at
powerup. This setting has no impact on auto-switching and
does not affect the current input channel selection. This setting
is stored in non-volatile memory.
:DEFault?
OUTPut:QUEStionable
:PACKed?
returns A or B
Query.
OUTPut:QUEStionable Subsystem
returns binary
weighted decimal
Provides status on each output in a single packed integer.
Each bit is associated with an output channel. The least
significant bit = output 1, next bit = output 2, and so on. If bit is
0, output signal is present. Hence value of 0 indicates that all
outputs are outputting the source signal. If there was no output
from outputs 2 and 3, the response would be:
6 (1*0 + 2*1 + 4*1 + 8*0 + ... = 6)
[:UNPacked]?
returns array of
Boolean
Provides status on each output (lowest numbered output to
highest). 0 = signal at output, 1 = no signal at output. Same
result as PACKed? (see prior command), but information on
each output is provided with separate value. If outputs 3 and 5
were not outputting the source signal, the response would be:
0,0,1,0,1,0,0,0,0,0,0,0
[SOURce]:ROSCillator
ROSCillator Subsystem (USED WITH OPTION 010 ONLY)
:WARM?
0 or 1
0 or 1
Reports if internal oscillator is warmed up.
0 = not warm.
1 = warm.
SYSTem
SYSTem Subsystem
:COMMunicate:SERial
:FDUPlex
Node Only
Sets duplex. (0 = echo Off, 1 = echo On).
[:RECeive] | TRANsmit
Node Only. There is a single setting of commands under this
node for both transmit and receive. Default values are in italics.
:BAUD
:BITS?
:PACE
:PARity
[:TYPE]
<numeric>
7 or 8
Sets the BAUD rate (1200, 2400, 9600, 19200).
Returns Data Bits set by PARity (7 for odd/even, 8 for none).
Sets flow control. (On or None).
XON | NONE
Node Only.
EVEN | ODD |
NONE
Sets parity. (Odd, Even, or None).
:ERRor?
returns integer,
quoted string
First parameter is error number, quoted string is error
description.
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Chapter 4 Command Reference
System Status Reporting Commands
System Status Reporting Commands
*CLS
This command clears the error queue.
ALARm?
This query returns alarm status of the 58502A.
Returns a single character, 0 or 1.
A value of 0 indicates alarm is off; a value of 1 indicates alarm is on.
If any of the outputs are not functional or there is an input alarm
(there may be additional internal conditions that generate alarm), 1 is
returned.
If all of the outputs are functional and there is no input alarm, 0 is
returned.
OUTPut:QUEStionable:PACKed?
This query returns the status on each output in a single packed
integer. Each bit is associated with an output channel. The least
significant bit = output 1, next bit = output 2, and so on.
Returns binary weighted decimal
If bit is +0, output signal is present. Hence value of +0 indicates that
all outputs are outputting the source signal. If there was no output
from outputs 2 & 3, the response would be:
+6 (1*0 + 2*1 + 4*1 + 8*0 + ... = 6)
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Chapter 4 Command Reference
System Status Reporting Commands
OUTPut:QUEStionable[:UNPacked]?
This query returns the status on each output (lowest numbered output
to highest).
Returns array of Boolean.
0 = signal at output; 1 = no signal at output. Same result as PACKed?
(see prior command), but information on each output is provided with
separate value. If outputs 3 and 5 were not outputting the source
signal, the response would be:
+0,+0,+1,+0,+1,+0,+0,+0,+0,+0,+0,+0
SYSTem:ERRor?
This query returns the oldest error in the Error Queue and removes
that error from the queue (first in, first out)
Returns an error number.
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Chapter 4 Command Reference
Identification Command
Identification Command
*IDN?
This query returns the 58502A identification.
A sequence of ASCII-encoded bytes:
HEWLETT-PACKARD, 58502A, XXXXY–ZZZZZ, WWWW – V
where 58502A is the product model number, XXXXYZZZZZ is the
product serial number, and WWWW is the product’s firmware revision
date code, and V is the hardware revision letter.
In the product serial number (XXXXY–ZZZZZ):
– XXXX is a four-digit prefix that identifies a series of instruments.
– Y identifies the country in which the instrument was manufactured
(e.g., the “A” in 3752A000123 stands for America).
– ZZZZZ is a five-digit suffix that identifies a particular instrument
within a series.
For example,
HEWLETT-PACKARD, 58502A, 3752A–00123,3422 – A
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Chapter 4 Command Reference
Internal Oscillator Calibrating and Status Commands (Option 010
Only)
Internal Oscillator Calibrating and Status
Commands (Option 010 Only)
DIAGnostic:CALibration:ROSCillator:EFC:ABSolute UP | DOWN
This command sets the absolute EFC (electronic frequency control) of
the oscillator.
Use UP or DOWN to adjust the EFC by the increment specified in the
STEP command described below.
For example, if present EFC value is 1000 and STEP value is 13,
DIAG:CAL:ROSC:EFC:ABS:UP will increase the EFC value to 1013.
DIAGnostic:CALibration:ROSCillator:EFC:ABSolute?
This query returns the absolute EFC value of the oscillator.
Returns an integer.
DIAGnostic:CALibration:ROSCillator:EFC:ABSolute:STEP
<numeric_value>
This command sets amount by which the absolute EFC value is
incremented when being adjustment.
Use an integer for the STEP incremental value (<numeric_value>.
For example, if present EFC value is 1000 and STEP value is 13,
DIAG:CAL:ROSC:EFC:ABS:UP will increase the EFC value to 1013.
DIAGnostic:CALibration:ROSCillator:EFC:ABSolute:STEP?
This query returns the incremental step value by which the absolute
EFC value is adjusted.
Returns an integer.
[SOURce]:ROSCillator:QUEStionable?
This query reports if the internal oscillator is producing 10 MHz.
Returns a single character, 0 or 1.
A value of 0 indicates oscillator output is normal.
A value of 1 indicates oscillator output is questionable.
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Chapter 4 Command Reference
Internal Oscillator Calibrating and Status Commands (Option 010
Only)
[SOURce]:ROSCillator:WARM?
This query reports if the internal oscillator is warmed up.
Returns a single character, 0 or 1.
A value of 0 indicates oscillator is not warm.
A value of 1 indicates oscillator output is warm.
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Chapter 4 Command Reference
Input Port Status and Setup Commands
Input Port Status and Setup Commands
INPut:A:QUEStionable?
This query reports if there is a signal present on input A.
Returns a single character, 0 or 1.
A value of 0 indicates signal is present (not questionable).
A value of 1 indicates no signal is present.
INPut:B:QUEStionable?
This query reports if there is a signal present on input B or backup
oscillator (Option 010).
Returns a single character, 0 or 1.
A value of 0 indicates signal is present (not questionable).
A value of 1 indicates no signal is present.
INPut:ALARM?
This query returns the alarm status of devices connected to the alarm
input pins (6 and 7) of the ALARM/STATUS port.
A value of 0,0,0 indicates no alarm exists.
A value of 1,0,0 indicates that an alarm exists from the device
connected to pin 6.
A value of 0,1,0 indicates that an alarm exists from the device
connected to pin 7.
An example of how to use and interpret the alarm inputs is given on
INPut:SELect A | B
This command selects either input A or input B or backup oscillator
(Option 010) as the input channel. This command also disables
auto-switching.
Use A or B to select the appropriate input port.
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Chapter 4 Command Reference
Input Port Status and Setup Commands
INPut:SELect?
This query indicates which input is selected as the source input.
Returns single character, A or B.
INPut:SELect:AUTO 0 | 1
This command enables or disables the automatic input switching
feature.
This setting is stored in non-volatile memory.
Use 0 (OFF) to disable auto-switching.
Use 1 (ON) to enable auto-switching.
INPut:SELect:AUTO?
This query returns the state of the automatic input switching feature.
Returns single character, 0 or 1.
A value of 0 indicates disabled.
A value of 1 indicates enabled.
INPut:SELect:DEFault A | B
This command selects the default input channel (or port) to be used at
powerup.
This setting has no impact on auto-switching and does not affect the
current input channel selection.
This setting is stored in non-volatile memory.
Use A or B to select the appropriate power-up default input port.
INPut:SELect:DEFault?
This query returns default input channel (or port) to be used at
powerup.
Returns single character, A or B.
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Chapter 4 Command Reference
Serial Interface Communication Commands
Serial Interface Communication
Commands
SYSTem:COMMunicate:SERial:BAUD <numeric_value>
This command sets the baud rate of the RS-232 port.
The possible baud rate values that can be entered are 1200, 2400,
9600, or 19200.
The baud rate value is stored in non-volatile memory. It is unaffected
by powerup.
SYSTem:COMMunicate:SERial:BAUD?
This query returns the baud rate value of RS-232 port.
Returns a an integer.
SYSTem:COMMunicate:SERial:BITS?
This query returns the data bits value of the RS-232 port.
Returns 7 for even or odd parity.
Returns 8 for no parity.
SYSTem:COMMunicate:SERial:FDUPlex ON | OFF
This command sets the duplex state of the RS-232 port. Use this
command when you cannot see, on the computer screen, the characters
you are typing for your command.
ON enables echoing of the characters you type (i.e., when typing a
command, the ON state allows you to see on the computer screen the
characters you type).
OFF disables the echoing of the characters you type.
The duplex state is stored in non-volatile memory. It is unaffected by
powerup.
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Chapter 4 Command Reference
Serial Interface Communication Commands
SYSTem:COMMunicate:SERial:FDUPlex?
This query returns the duplex state of the RS-232 port.
Returns a single character, 0 or 1.
A value of 0 indicates echo is OFF; a value of 1 indicates echo is ON.
SYSTem:COMMunicate:SERial:PACE XON | NONE
This command sets flow control of the RS-232 port.
The choices are XON or NONE.
The software pacing or flow control state is stored in non-volatile
memory. It is unaffected by powerup.
SYSTem:COMMunicate:SERial:PACE?
This query returns the flow control state of the RS-232 port.
Returns XON or NONE.
SYSTem:COMMunicate:SERial:PARity EVEN | ODD | NONE
This command sets parity of the RS-232 port.
The choices are EVEN, ODD, or NONE.
The parity state is stored in non-volatile memory. It is unaffected by
powerup.
If parity is enabled, the 58502A sends/receives 7 data bits plus 1 parity
bit. If parity is disabled, the 58502A sends/receives 8 data bits.
SYSTem:COMMunicate:SERial:PARity?
This query returns the parity setting of the RS-232 port.
Returns EVEN, ODD, or NONE.
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5
Functional Description
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Chapter 5 Functional Description
Introduction
Introduction
This chapter gives a simplified functional description of the
58502A Broadband Distribution Amplifier. The 58502A provides
twelve-channel isolation and distribution for a input timing signal,
which frequency can range from 100 kHz to 10 MHz.
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Chapter 5 Functional Description
Functional Block Description of the 58502A
Functional Block Description of the
58502A
The 58502A electronic circuits consist of five primary blocks:
• Controller
• Panel LEDs
• 2-to-1 Switch
• 1-to-12 Amplifiers and Isolators
• Power Supply Module
Figure 5-1 is a simplified, overall-block diagram the 58502A circuitry.
status
Panel
LEDs
Controller
RS-232
Alarm input
Alarm/status
input
select
output
condition
Output 1
Output 2
Input A
Input B
1- to -12
Amplifiers
and
2- to -1
Switch
Isolators
Output 12
+5 Vdc
+15 Vdc
-15 Vdc
Power
Supply
Module
Power
(AC )
Figure 5-1. Simplified Block Diagram
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Chapter 5 Functional Description
Functional Block Description of the 58502A
Controller Block
This block provides remote instrument management via commands
transferred through the RS-232 serial port. It also provides hardware
output alarm signals via the Alarm/Status connector that go active
when the controller block lights the front-panel system status alarm
indicator. Alarm inputs are received and processed by the controller
block.
The block consists of a microprocessor and associated support circuitry
that together facilitate control of all internal housekeeping, command
actions, diagnostic, and system status instrument functions. All
instrument functions are controlled and/or monitored by this block.
Panel LEDs Block
This block consists of hardware that provides visual indicators for the
operating status of instrument power, system alarm, inputs A and B,
and distribution amplifier channels 1 through 12. During normal
operation the power, all output status, and one or both input system
status indicators should illuminate.
If an effective input signal is lost (absent on both inputs A and B), then
both input A and B, and all output status indicators will be
extinguished, and the alarm indicator will be lit. If a hardware fault
occurs on one or more output distribution channels, then that channel's
associated indicator will be extinguished and the alarm indicator will
illuminate.
2-to-1 Switch Block
This block consists of inputs A and B routed to a programmable switch
that provides a single output to the input of the 1-to-12 Amplifiers and
Isolators block. Input selection switching for this block is controlled by
the input select line that arrives from the controller block.
The controller block input select line state (at power on from the
factory) selects input A over B, if valid signals are present at both
connectors, but will switch to input B automatically, if the signal at
input A fails. If input B fails and input A signal reappears, the
controller block will select input A again as the valid input signal
source. If both inputs fail, no select line state change will occur.
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Chapter 5 Functional Description
Functional Block Description of the 58502A
1-to-12 Amplifiers and Isolators Block
This block consists of twelve separate individual isolation amplifiers
that accomplish the distribution of the source frequency (ranging from
100 kHz to 10 MHz) into twelve available output channels with very
low phase noise and signal distortion at the rear-panel output BNC
connectors. In addition, each output is impervious to the effects an
adjacent channel short or open connection during normal operation.
A single input signal feeds all twelve isolation amplifiers that is routed
from the output of the 2-to-1 Switch block. This block includes BITE
hardware (Built In Test Equipment) that monitors the presence of all
twelve outputs and routes this information to the Controller block via
the output condition signal line.
Power Supply Module Block
This block provides +5, +15, and -15 Vdc to all other blocks in the
instrument. When ac power is used, it provides fuse protection, steps
down, rectifies, filters, regulates, and distributes internal dc power.
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Chapter 5 Functional Description
Functional Block Description of the 58502A
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6
Service
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Chapter 6 Service
Introduction
Introduction
This chapter provides the information required to determine if the
58502A Broadband Distribution Amplifier is faulty.
Determining 58502A Fault Status
Use the following procedure to determine fault status of the
58502A Distribution Amplifier.
1
2
3
Perform the Power-on Self test as described in Chapter 1, “Getting
Started,” of this guide.
If self test passes, go to step 2.
If the test fails, go to step 5.
Verify RS-232 serial-port setup and operation as described in
Chapter 1, “Getting Started,” of this guide.
If the test passes, go to step 3.
If the test fails, go to step 5.
Verify the Alarm/Status output operation as described in the
“ALARM/STATUS Verification” subsection in Chapter 2,
“Performance Test.”
If pass, go to step 4.
If the test fails twice, go to step 5.
4
If steps 1 through 3 pass successfully, performance the procedures
in the section titled “58502A Performance Tests” in Chapter 2,
“Performance Test,” of this guide.
If the performance tests pass, Re-check all system input signals
and output loads connected to the 58502A and troubleshoot them as
required.
If performance tests fail, go to step 5.
5
If any combination of steps 1 through 4 fail, return the instrument
for service.
6-2
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Chapter 7 Specifications
Introduction
Introduction
This chapter provides electrical specifications and supplemental
characteristics for the 58502A Broadband Distribution Amplifier.
Electrical specifications describe the instrument’s warranted
performance. Supplemental characteristics are intended to provide
information useful to apply to the instrument by giving typical or
nominal, but non-warranted performance parameters.
7-2
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Chapter 7 Specifications
Introduction
Electrical Specifications
Environmental Specifications
Input, A or B
Temperature
Frequency Range:
Impedance:
0.1 MHz to 10 MHz
50Ω nominal
Operating:
Non-operating:
EMI:
0° C to +55° C
−40° C to +70° C
CISPR 11, Group 1,
Class B
SWR <1.5
Amplitude:
+15 dBm maximum
+7 dBm minimum
BNC (female)
Remote System Interface and Control
Connector:
Data Communications: RS-232C, DTE
Outputs (into 50Ω)
Connector:
DE-9P (male)
Amplitude:
+13 dBm, +1 dB/−3 dB
<−32 dBc
Alarm/Status Input and Output
Harmonics:
(for Option 010):
Spurious:
<−20 dBc
Connector:
DE-9P (male)
TTL High
TTL Low
<−110 dBc, <−113 typical
<−80 dBc
BNC (female)
Normal State:
Alarm State:
(for Option 010):
Connector:
Output Configuration: Open-collector output,
Mechanical Specifications
10kΩ pull-up to 5 Vdc
Weight:
Shipping Weight:
Dimensions:
2.95 kg
6.35 kg
Height: 45 mm
Width: 426 mm
Depth: 344 mm
Power Requirements
AC Input:
100–132 or
175–240 Vac
47–63 Hz
80 VA Max
Supplemental Characteristics
Available Options
Outputs
Option 010:
Internal Backup Oscillator
Single Sideband Phase Noise
(1 Hz bandwidth)
(10 MHz Precision Oven
Controlled Quartz Crystal)—
replaces Input B
Offset Frequency
Phase Noise
100 Hz
1 kHz
10 kHz
<−127 dBc/Hz
<−142 dBc/Hz
<−148 dBc/Hz
Stability:
Temperature Stability: 6 × 10−9 (0° C to +55° C)
Aging/Day:
Aging/Year:
Tuning Range:
5 × 10−10
1 × 10−7
Port-to-Port Isolation: <−100 dBc typical
(measured by switching between open and short
loads on output port and measuring associated
phase noise on adjacent output port)
7 × 10−7 (minimum)
Option AX4:
Rack Mount Kit
User’s Guide
7-3
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Chapter 7 Specifications
Introduction
7-4
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Index
SYSTEem
COMMunicate
SERial1
B
SYSTem
C
COMMunicate
channel
channels
SERial
circuit description
command
commands
SERial1
DIAGnostic:CALibration:ROSCillator:
DIAGnostic:CALibration:ROSCillator:
DIAGnostic:CALibration:ROSCillator:
DIAGnostic:CALibration:ROSCillator:
SYMBOLS
commands
OUTPut
INPut
OUTPut:QUEStionable:UNPacked?,
4-7
NUMERICS
A
alarm system
User’s Guide
Index-1
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Index
SYSTem:COMMunicate:SERial:BAUD
, 4-13
DIAGnostic:CALibration:ROSCillato:EF
SYSTem:COMMunicate:SERial:BAUD
DIAGnostic:CALibration:ROSCillator:EF
SYSTem:COMMunicate:SERial:BITS?, DIAGnostic:CALibration:ROSCillator:EF
SYSTem:COMMunicate:SERial:FDUP
SYSTem:COMMunicate:SERial:FDUP
DIAGnostic:CALibration:ROSCillator:EF
SYSTem:COMMunicate:SERial:PACE,
SYSTem:COMMunicate:SERial:PACE
SYSTem:COMMunicate:SERial:PARit
E
equipment
SYSTem:COMMunicate:SERial:PARit
communication, serial interface
communications
F
factory default values
computer
configuration
connecting
connector
G
H
HP 5071A Primary Frequency
I
indicator
conventions
D
description
INPut
input
Index-2
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Index
outputs
inputs
installing rack mount
rack mount
P
port
interface port
ports
J
jack
L
LED
Q
indicator
R
receiver
record
M
RS-232 port
O
factory default values
User’s Guide
Index-3
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Index
RS-232 port
test
S
serial port
U
V
verification
socket
specifications
SYSTem:COMMunicate:SERial:BAUD,
4-13
SYSTem:COMMunicate:SERiaL:BAUD?
SYSTem:COMMunicate:SERial:BITS?,
4-13
SYSTem:COMMunicate:SERial:FDUPlex
, 4-13
SYSTem:COMMunicate:SERial:FDUPlex
SYSTem:COMMunicate:SERial:PACE,
SYSTem:COMMunicate:SERial:PACE?,
SYSTem:COMMunicate:SERial:PARity,
SYSTem:COMMunicate:SERial:PARity?,
T
terminal
Index-4
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