Agilent Technologies Welding System 33120A User Manual

Service Guide

Publication Number 33120-90017 (order as 33120-90104 manual set)

Edition 6, March 2002

For Safety information, Warranties, and Regulatory information,

see the last page in this manual.

Agilent 33120A

15 MHz Function /

Arbitrary Waveform Generator

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Note: Unless otherwise indicated, this manual applies to all Serial Numbers.

The Agilent Technologies 33120A is a high-performance 15 MHz

synthesized function generator with built-in arbitrary waveform

capability. Its combination of bench-top and system features makes this

function generator a versatile solution for your testing requirements now

and in the future.

Convenient bench-top features

œ 10 standard waveforms

œ Built-in 12-bit 40 MSa/s arbitrary waveform capability

œ Easy-to-use knob input

œ Highly visible vacuum-fluorescent display

œ Instrument state storage

œ Portable, ruggedized case with non-skid feet

Flexible system features

œ Four downloadable 16,000-point arbitrary waveform memories

œ GPIB (IEEE-488) interface and RS-232 interface are standard

œ SCPI (Standard Commands for Programmable Instruments) compatibility

œ Agilent IntuiLink Arb Waveform Generation Software for

Microsoft Windows

The procedures in this manual are intended for use by qualified,

service-trained personnel only.

Warning

Agilent 33120A

15 MHz Function /

Arbitrary Waveform Generator

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The Front Panel at a Glance

Function / Modulation keys

Menu operation keys

Waveform modify keys

Single / Internal Trigger key

(Burst and Sweep only)

Recall / Store instrument state key

Enter Number key

Shift / Local key

Enter Number “units” keys

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Front-Panel Number Entry

You can enter numbers from the front-panel using one of three methods.

Use the knob and the arrow keys to modify the displayed number.

Use the arrow keys to edit individual digits.

Increments the flashing digit.

Decrements the flashing digit.

Moves the flashing digit to the right.

Moves the flashing digit to the left.

Use the “Enter Number” mode to enter a number with the appropriate units.

Use “Enter” for those operations that do not

require units to be specified (AM Level,

Offset, % Duty, and Store/Recall State).

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The Front-Panel Menu at a Glance

The menu is organized in a top-down tree structure with three levels.

A: MODulation MENU

1: AM SHAPE 2: AM SOURCE

3: FM SHAPE

4: BURST CNT

9: FSK RATE

5: BURST RATE

10: FSK SRC

6: BURST PHAS

7: BURST SRC 8: FSK FREQ

B: SWP (Sweep) MENU

1: START F

2: STOP F

3: SWP TIME

4: SWP MODE

C: EDIT MENU

1: NEW ARB

[ 2: POINTS ]

[ 3: LINE EDIT ]

[ 4: POINT EDIT ]

[ 5: INVERT ]

[ 6: SAVE AS ]

7: DELETE

The commands enclosed in square brackets ( [ ] ) are “hidden” until you make a selection from the

NEW ARB command to initiate a new edit session.

D: SYStem MENU

1: OUT TERM

2: POWER ON

3: ERROR

4: TEST

5: COMMA

6: REVISION

E: Input / Output MENU

1: HPIB ADDR

2: INTERFACE

3: BAUD RATE

4: PARITY

5: LANGUAGE

F: CALibration MENU

1: SECURED or [ 1: UNSECURED ]

[ 2: CALIBRATE ]

3: CAL COUNT

4: MESSAGE

The commands enclosed in square brackets ( [ ] ) are “hidden” unless the function generator

is UNSECURED for calibration.

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Display Annunciators

Adrs

Rmt

Trig

Function generator is addressed to listen or talk over a remote interface.

Function generator is in remote mode (remote interface).

Function generator is waiting for a single trigger or external trigger (Burst, Sweep).

AM modulation is enabled.

FM modulation is enabled.

Ext

Function generator is set for an external modulation source (AM, FSK, Burst).

FSK (frequency-shift keying) modulation is enabled.

Burst modulation is enabled.

FSK

Burst

Swp

ERROR

Offset

Shift

Num

Arb

Sweep mode is enabled.

Hardware or remote interface command errors are detected.

The waveform is being output with an offset voltage.

“Shift” key has been pressed. Press “Shift” again to turn off.

“Enter Number” mode is enabled. Press “Shift-Cancel” to disable.

Arbitrary waveform function is enabled.

Sine waveform function is enabled.

Square waveform function is enabled.

Triangle waveform function is enabled.

Ramp waveform function is enabled.

To review the display annunciators, hold down the Shift key as you

turn on the function generator.

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The Rear Panel at a Glance

Chassis ground

Power-line fuse-holder assembly

Power-line voltage setting

External Trigger / FSK / Burst modulation

input terminal

GPIB (IEEE-488) interface connector

RS-232 interface connector

AM modulation input terminal

Use the front-panel Input /Output Menu to:

œ Select the GPIB or RS-232 interface (see chapter 4 in User’s Guide).

œ Set the GPIB bus address (see chapter 4 in User’s Guide).

œ Set the RS-232 baud rate and parity (see chapter 4 in User’s Guide).

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In This Book

Specifications Chapter 1 lists the function generator’s specifications

and describes how to interpret these specifications.

Quick Start Chapter 2 prepares the function generator for use and

helps you get familiar with a few of its front-panel features.

Front-Panel Menu Operation Chapter 3 introduces you to the front-panel

menu and describes some of the function generator’s menu features.

Calibration Procedures Chapter 4 provides calibration, verification,

and adjustment procedures for the function generator.

Theory of Operation Chapter 5 describes block and circuit level theory

related to the operation the function generator.

Service Chapter 6 provides guidelines for returning your function

generator to Agilent for servicing, or for servicing it yourself.

Replaceable Parts Chapter 7 contains a detailed parts lists of the

function generator.

Schematics Chapter 8 contains the function generator’s block diagram,

schematics, disassembly drawings, and component locator drawings.

For information on using the Phase-Lock Option for the 33120A, refer to

the User’s and Service Guide included with the Option 001.

If you have questions relating to the operation of the 33120A,

call 1-800-452-4844 in the United States, or contact your nearest

Agilent Technologies Sales Office.

If you believe your 33120A has failed, refer to “Operating Checklist”,

“Types of Service Available”, and “Repackaging for Shipment” at the

beginning of chapter 6.

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Contents

Chapter 1 Specifications

Chapter 2 Quick Start

To prepare the function generator for use 21

If the function generator does not turn on 22

To adjust the carrying handle 24

To set the output frequency 25

To set the output amplitude 26

To set a dc offset voltage 27

To set the duty cycle 28

To output a stored arbitrary waveform 29

To output a dc voltage 30

To store the instrument state 31

To rack mount the function generator 33

Chapter 3 Front-Panel Menu Operation

Front-panel menu reference 37

A front-panel menu tutorial 39

To select the output termination 44

To output a modulated waveform 45

To unsecure the function generator for calibration 47

Chapter 4 Calibration Procedures

Agilent Calibration Services 51

Calibration Interval 51

Time Required for Calibration 51

Automating Calibration Procedures 52

Recommended Test Equipment 52

Test Considerations 53

Performance Verification Tests 54

Frequency Verification 56

Function Gain and Linearity Verification 56

DC Function Offset Verification 57

AC Amplitude Verification 57

Amplitude Flatness Verification 60

AM Modulation Depth Verification 61

Optional Performance Verification Tests 62

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Contents

Chapter 4 Calibration Procedures (continued)

Calibration Security Code 64

Calibration Count 66

Calibration Message 66

General Calibration/Adjustment Procedure 67

Aborting a Calibration in Progress 69

Frequency and Burst Rate Adjustment 69

Function Gain and Linearity Adjustment 70

AC Amplitude Adjustment (High-Z) 70

Modulation Adjustment 72

AC Amplitude Adjustment (50W) 73

DC Output Adjustment 76

Duty Cycle Adjustment 77

AC Amplitude Flatness Adjustment 77

Output Amplifier Adjustment (Optional) 80

Error Messages 81

Chapter 5 Theory of Operation

Block Diagram Overview 85

Output Attenuator 86

Output Amplifier 87

AM Modulation 89

Pre-attenuator 90

Square Wave and Sync 90

Filters 92

Waveform DAC/Amplitude Leveling/Waveform RAM 93

Direct Digital Synthesis (DDS ASIC) 95

System DACs 96

Floating Logic 97

Earth-Referenced Logic 98

Power Supplies 98

Display and Keyboard 100

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Contents

Chapter 6 Service

Operating Checklist 103

Types of Service Available 104

Repackaging for Shipment 105

Cleaning 105

Electrostatic Discharge (ESD) Precautions 106

Surface Mount Repair 106

To Replace the Power-Line Fuse 107

To Replace the Output Protection Fuse (F801) 107

Troubleshooting Hints 108

Self-Test Procedures 110

Chapter 7 Replaceable Parts

Replaceable Parts 113

Chapter 8 Schematics

33120A Block Diagram 129

Mechanical Disassembly 130

Floating Logic Schematic 131

Digital Waveform Data Synthesis 132

System DAC Schematic 133

Waveform DAC Schematic 134

Filters Schematic 135

Sync, Square Wave, and Attenuator Schematic 136

Output Amplifier Schematic 137

Output Attenuator Schematic 138

Earth Reference Logic Schematic 139

Power Supplies Schematic 140

Display and Keyboard Schematic 141

33120-66521 Component Locator Diagram 142

33120-66502 Component Locator Diagram 143

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Specifications

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Chapter 1 Specifications

Agilent 33120A Function Generator

SIGNAL CHARACTERISTICS

WAVEFORMS

Squarewave

Rise/Fall Time:

Overshoot:

Asymmetry:

Duty Cycle:

Standard Waveforms:

Sine, Square, Triangle,

Ramp, Noise, DC volts,

Sine(x)/x, Negative Ramp,

Exponential Rise,

< 20 ns

< 4%

1% + 5 ns

20% to 80% (to 5 MHz)

40% to 60% (to 15 MHz)

Exponential Fall, Cardiac

Arbitrary Waveforms:

Waveform Length:

Amplitude Resolution:

Sample Rate:

Triangle, Ramp, Arb

Rise/Fall Time:

Linearity:

Settling Time:

Jitter:

8 to 16,000 points

12 bits (including sign)

40 MSa / sec

40 ns (typical)

< 0.1% of peak output

< 250 ns to 0.5% of final value

< 25 ns

Non-Volatile Memory:

Four 16,000-point waveforms

FREQUENCY CHARACTERISTICS

OUTPUT CHARACTERISTICS ⁽¹⁾

Sine:

100 Hz – 15 MHz

100 Hz – 100 kHz

10 MHz bandwidth

(2)

Amplitude (into 50 ):

Accuracy (at 1 kHz):

Flatness

50 mVpp – 10 Vpp

Square:

1% of specified output

(sine wave relative to 1 kHz)

1% (0.1 dB)

Triangle:

Ramp:

Noise (Gaussian):

Arbitrary Waveforms:

8 to 8,192 points:

8,193 to 12,287 points:

12,288 to 16,000 points:

< 100 kHz:

100 kHz to 1 MHz:

1 MHz to 15 MHz:

1.5% (0.15 dB)

2% (0.2 dB) Ampl 3Vrms

3.5% (0.3 dB) Ampl<3Vrms

100 Hz – 5 MHz

100 Hz – 2.5 MHz

100 Hz – 200 kHz

(3)

Offset (into 50 ):

5 Vpk ac + dc

2% of setting + 2 mV

(4)

Accuracy:

Resolution:

Accuracy:

10 Hz or 10 digits

Output Impedance:

Resolution:

50 ohms fixed

10 ppm in 90 days,

20 ppm in 1 year,

18 C – 28 C

3 digits, Amplitude and Offset

Vpp, Vrms, dBm

Output Units:

Isolation:

Temperature Coefficient:

Aging:

< 2 ppm / C

< 10 ppm / yr

42 Vpk maximum to earth

Protection:

Short-circuit protected

15 Vpk overdrive < 1 minute

SINEWAVE SPECTRAL PURITY (into 50 )

Harmonic Distortion

DC to 20 kHz:

-70 dBc

-60 dBc

-45 dBc

-35 dBc

20 kHz to 100 kHz:

100 kHz to 1 MHz:

1 MHz to 15 MHz:

(1) Add 1/10th of output amplitude and offset specification

per C for operation outside of 18 C to 28 C range

(1-year specification).

Total Harmonic Distortion

DC to 20 kHz:

< 0.04%

(2) 100 mVpp – 20 Vpp amplitude into open-circuit load.

Spurious (non-harmonic)

Output (DC to 1 MHz):

Output (> 1 MHz):

(3) Offset

2 X peak-to-peak amplitude.

< -65 dBc

< -65 dBc + 6 dB/octave

(4) For square wave outputs, add 2% of output amplitude

additional error.

Phase Noise:

< -55 dBc in a 30 kHz band

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Chapter 1 Specifications

Agilent 33120A Function Generator

SYSTEM CHARACTERISTICS

MODULATION CHARACTERISTICS

(2)

(3)

AM Modulation

Configuration Times

(3)

Carrier -3 dB Freq:

Modulation:

10 MHz (typical)

Function Change:

Frequency Change:

Amplitude Change:

Offset Change:

80 ms

30 ms

Any internal waveform plus Arb

10 mHz to 20 kHz ( 0.05% to

2.5 kHz, then decreases linearly

to 0.4% at upper limit)

0% to 120%

Frequency:

30 ms

10 ms

100 ms

< 350 ms

Select User Arb:

Depth:

Source:

Modulation Parameter Change:

Internal / External

FM Modulation

Modulation:

Any internal waveform plus Arb

10 mHz to 10 kHz ( 0.05% to

600 Hz, then decreases linearly

to 0.8% at upper limit)

10 mHz to 15 MHz

Arb Download Times over GPIB:

Frequency:

(4)

Arb Length

Binary

ASCII Integer ASCII Real

Peak Deviation:

Source:

Internal Only

16,000 points

8,192 points

4,096 points

2,048 points

8 sec

4 sec

2.5 sec

1.5 sec

81 sec

42 sec

21 sec

11 sec

100 sec

51 sec

26 sec

13 sec

Burst Modulation

Carrier Frequency:

Count:

5 MHz max.

1 to 50,000 cycles, or Infinite

-360 to +360

Start Phase:

(5)

Arb Download Times over RS-232 at 9600 Baud:

Internal Rate:

Gate Source:

Trigger Source:

10 mHz to 50 kHz 1%

Internal or External Gate

(1)

(6)

Single, External, or Internal Rate

Arb Length

Binary

ASCII Integer ASCII Real

FSK Modulation

16,000 points

8,192 points

4,096 points

2,048 points

35 sec

18 sec

10 sec

6 sec

101 sec

52 sec

27 sec

14 sec

134 sec

69 sec

35 sec

18 sec

Frequency Range:

10 mHz to 15 MHz ( 0.05% to

600 Hz, then decreases linearly

to 4% at upper limit)

Internal Rate:

Source:

10 mHz to 50 kHz

Internal / External (1 MHz max.)

FREQUENCY SWEEP

Type:

Linear or Logarithmic

Direction:

Start F / Stop F:

Time:

Up or Down

10 mHz to 15 MHz

1 ms to 500 sec 0.1%

Single, External, or Internal

(1) Trigger source ignored when External Gate is selected.

(2) Time to change parameter and output the new signal.

(3) Modulation or sweep off.

Source:

REAR-PANEL INPUTS

External AM

Modulation:

5 Vpk = 100% Modulation

5 k Input Resistance

(4) Times for 5-digit and 12-digit numbers.

(5) For 4800 baud, multiply the download times by two;

External Trigger/FSK

For 2400 baud, multiply the download times by four, etc.

(1)

Burst Gate:

Latency:

Jitter:

TTL (low true)

1.3 s

25 ns

(6) Time for 5-digit numbers. For 12-digit numbers,

multiply the 5-digit numbers by two.

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Chapter 1 Specifications

Agilent 33120A Function Generator

GENERAL SPECIFICATIONS

(1)

Power Supply:

100V / 120V / 220V / 240V 10%

(switch selectable)

Safety Designed to:

EMC:

EN61010, CSA1010, UL-1244

EN61326, 1:1997 + 1A:1998

Power-Line Frequency:

50 Hz to 60 Hz 10% and

400 Hz 10%. Automatically

sensed at power-on.

Vibration and Shock:

MIL-T-28800E, Type III, Class 5

(data on file)

Power Installation:

CAT II

Acoustic Noise:

Warm-Up Time:

30 dBa

Power Consumption:

50 VA peak (28 W average)

1 hour

Operating Environment: 0 C to 55 C

80% Relative Humidity to 40 C

Warranty:

3 years standard

IEEE-488 and RS-232 standard

SCPI-1993, IEEE-488.2

Indoor or sheltered location

Remote Interface:

Programming Language:

Accessories Included:

Storage Environment:

State Storage Memory:

-40 C to 70 C

Power-off state automatically

saved. Three (3) User-

Configurable Stored States,

Arbitrary waveforms stored

separately.

User’s Guide, Service Guide,

Quick Reference Card,

IntuiLink Arb software,

RS-232 cable, Test Report,

and power cord.

Dimensions (W x H x D)

Bench Top:

Rack Mount:

254.4 mm x 103.6 mm x 374 mm

212.6 mm x 88.5 mm x 348.3 mm

N10149

Weight:

4 kg (8.8 lbs)

(1) For 400 Hz operation at 120 Vac, use the 100 Vac

line-voltage setting.

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Chapter 1 Specifications

Agilent 33120A Function Generator

PRODUCT DIMENSIONS

TOP

All dimensions are

shown in millimeters.

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Quick Start

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Quick Start

One of the first things you will want to do with your function generator is

to become acquainted with its front panel. We have written the exercises

in this chapter to prepare the function generator for use and help you get

familiar with some of the front-panel operations.

The front panel has two rows of keys to select various functions and

operations. Most keys have a shifted function printed in blue above the

key. To perform a shifted function, press Shift (the Shift annunciator will

turn on). Then, press the key that has the desired label above it. For

example, to select the AM (amplitude modulation) function, press

Shift AM (the shifted version of the

key).

If you accidentally press Shift , just press it again to turn off the Shift

annunciator.

Most keys also have a number printed in green next to the key. To enable

the number mode, press Enter Number (the Num annunciator will turn on).

Then, press the keys that have the desired numbers printed next to them.

For example, to select the number “10”, press Enter Number

(next to the and Recall keys).

If you accidentally press Enter Number , just press Shift Cancel to turn

off the Num annunciator.

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Chapter 2 Quick Start

To prepare the function generator for use

The following steps help you verify that the function generator is

ready for use.

1 Check the list of supplied items.

Verify that you have received the following items with your function

generator. If anything is missing, contact your nearest Agilent

Technologies Sales Office.

One power cord.

One RS-232 serial cable.

One User’s Guide.

This Service Guide.

One folded Quick Reference card.

Certificate of Calibration.

Agilent IntuiLink Arb Waveform Generation Software.

2 Connect the power cord and turn on the function generator.

If the function generator does not turn on, see chapter 6 for troubleshooting

information. The front-panel display will light up while the function

generator performs its power-on self-test. The GPIB bus address is

displayed. Notice that the function generator powers up in the sine wave

function at 1 kHz with an amplitude of 100 mV peak-to-peak (into a 50W

termination).

To review the power-on display with all annunciators turned on,

hold down Shift as you turn on the function generator.

3 Perform a complete self test.

The complete self-test performs a more extensive series of tests than

those performed at power-on. Hold down Shift as you press the Power

switch to turn on the function generator; hold down the key for more than

5 seconds. The self-test will begin when you release the key.

If the self-test is successful, “PASS” is displayed on the front panel.

If the self-test is not successful, “FAIL” is displayed and the ERROR

annunciator turns on. See chapter 6 for instructions on returning the

function generator to Agilent for service.

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Chapter 2 Quick Start

If the function generator does not turn on

Use the following steps to help solve problems you might experience

when turning on the function generator. If you need more help,

see chapter 6 for instructions on returning the function generator to

Agilent for service.

1 Verify that there is ac power to the function generator.

First, verify that the function generator’s Power switch is in the

“On” position. Also, make sure that the power cord is firmly plugged into

to the power module on the rear panel. You should also make sure that

the power source you plugged the function generator into is energized.

2 Verify the power-line voltage setting.

The line voltage is set to the proper value for your country when the

function generator is shipped from the factory. Change the voltage

setting if it is not correct. The settings are: 100, 120, 220, or 240 Vac

(for 230 Vac operation, use the 220 Vac setting).

See the next page if you need to change the line-voltage setting.

3 Verify that the power-line fuse is good.

The function generator is shipped from the factory with a 500 mAT fuse

installed. This is the correct fuse for all line voltages.

See the next page if you need to change the power-line fuse.

To replace the 500 mAT fuse, order Agilent part number 2110-0458.

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Chapter 2 Quick Start

If the function generator does not turn on

2 Remove the line-voltage selector from

1 Remove the power cord. Remove the

the assembly.

fuse-holder assembly from the rear panel.

Fuse: 500 mAT (for all line voltages)

Part Number: 2110-0458

3 Rotate the line-voltage selector until the

4 Replace the fuse-holder assembly in

correct voltage appears in the window.

the rear panel.

100, 120, 220 (230), or 240 Vac

Verify that the correct line voltage is selected and the power-line fuse is good.

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Chapter 2 Quick Start

To adjust the carrying handle

To adjust the position, grasp the handle by the sides and pull outward.

Then, rotate the handle to the desired position.

Bench-top viewing positions

Carrying position

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Chapter 2 Quick Start

To set the output frequency

At power-on, the function generator outputs a sine wave at 1 kHz with

an amplitude of 100 mV peak-to-peak (into a 50W termination).

The following steps show you how to change the frequency to 1.2 MHz.

Freq

1 Enable the frequency modify mode.

The displayed frequency is either the power-on value or the previous

frequency selected. When you change functions, the same frequency is

used if the present value is valid for the new function.

1.000,000,0 KHz

Enter Number

2 Enter the magnitude of the desired frequency.

Notice that the Num annunciator turns on and “ENTER NUM” flashes on

the display, indicating that the number mode is enabled.

1.2

To cancel the number mode, press Shift Cancel .

MHz

m Vpp

3 Set the units to the desired value.

The units are selected using the arrow keys on the right side of the front

panel. As soon as you select the units, the function generator outputs the

waveform with the displayed frequency. To turn off the flashing digit,

move the cursor to the left of the display using the arrow keys.

1.200,000,0 MHz

You can also use the knob and arrow keys to enter a number.

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Chapter 2 Quick Start

To set the output amplitude

At power-on, the function generator outputs a sine wave with an

amplitude of 100 mV peak-to-peak (into a 50W termination).

The following steps show you how to change the amplitude to 50 mVrms.

Ampl

1 Enable the amplitude modify mode.

The displayed amplitude is either the power-on value or the previous

amplitude selected. When you change functions, the same amplitude is

used if the present value is valid for the new function.

100.0 mVPP

Enter Number

2 Enter the magnitude of the desired amplitude.

Notice that the Num annunciator turns on and “ENTER NUM” flashes on

the display, indicating that the number mode is enabled.

To cancel the number mode, press Shift Cancel .

Shift

3 Set the units to the desired value.

kHz

m Vrms

The units are selected using the arrow keys on the right side of the front

panel. As soon as you select the units, the function generator outputs the

waveform with the displayed amplitude. To turn off the flashing digit,

move the cursor to the left of the display using the arrow keys.

50.00 mVRMS

You can also use the knob and arrow keys to enter a number.

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Chapter 2 Quick Start

To set a dc offset voltage

At power-on, the function generator outputs a sine wave with a dc offset

voltage of 0 volts (into a 50W termination). The following steps show you

how to change the offset to –1.5 mVdc.

Offset

1 Enable the offset modify mode.

The displayed offset voltage is either the power-on value or the previous

offset selected. When you change functions, the same offset is used if the

present value is valid for the new function.

+0.000 VDC

Enter Number

2 Enter the magnitude of the desired offset.

Notice that the Num annunciator turns on and “ENTER NUM” flashes on

the display, indicating that the number mode is enabled. Notice that

–

toggles the displayed value between + and – .

-1.5

To cancel the number mode, press Shift Cancel .

Shift

3 Set the units to the desired value.

kHz

m Vrms

At this point, the function generator outputs the waveform with the

displayed offset. Notice that the Offset annunciator turns on, indicating

that the waveform is being output with an offset. The annunciator will

turn on when the offset is any value other than 0 volts. To turn off the

flashing digit, move the cursor to the left of the display using the arrow keys.

-01.50 mVDC

You can also use the knob and arrow keys to enter a number.

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Chapter 2 Quick Start

To set the duty cycle

Applies only to square waves. At power-on, the duty cycle for square waves

is 50%. You can adjust the duty cycle for a square waveform from 20%

to 80%, in increments of 1% (for frequencies above 5 MHz, the range is 40%

to 60%). The following steps show you how to change the duty cycle to 45%.

1 Select the square wave function.

Notice that the

annunciator turns on, indicating that the square

wave function is enabled.

Shift

% Duty

2 Enable the duty cycle modify mode.

The displayed duty cycle is either the power-on value or the previous

value selected.

50 % DUTY

This message appears on the display for approximately 10 seconds.

Repeat this step as needed.

Enter Number

3 Enter the desired duty cycle.

Notice that the Num annunciator turns on and “ENTER NUM” flashes on

the display, indicating that the number mode is enabled.

To cancel the number mode, press Shift Cancel .

Enter

4 Output the waveform with the displayed duty cycle.

45 % DUTY

You can also use the knob and arrow keys to enter a number.

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Chapter 2 Quick Start

To output a stored arbitrary waveform

There are five built-in arbitrary waveforms stored in non-volatile memory

for your use. You can output these waveforms directly from non-volatile

memory. The following steps show you how to output an “exponential rise”

waveform from memory.

Shift

Arb List

1 Display the list of arbitrary waveforms.

The list contains the five built-in arbitrary waveforms (sinc, negative

ramp, exponential rise, exponential fall, and cardiac). The list may also

contain up to four user-defined arbitrary waveform names. The first

choice on this level is “SINC”.

SINC

This message appears on the display for approximately 10 seconds.

Repeat this step as needed.

2 Move across to the EXP_RISE choice.

EXP_RISE

Enter

3 Select and output the displayed arbitrary waveform.

Notice that the Arb annunciator turns on, indicating that the output is an

arbitrary waveform. The waveform is output using the present settings

for frequency, amplitude, and offset unless you change them.

The selected waveform is now assigned to the Arb key. Whenever you

press this key, the selected arbitrary waveform is output.

You can also use the knob to scroll left or right through the choices in the list.

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Chapter 2 Quick Start

To output a dc voltage

In addition to generating waveforms, you can also output a dc voltage in

the range – 5 Vdc (into a 50W termination). The following steps show you

how to output +155 mVdc.

Offset

1 Press the

key and hold it down for more than 2 seconds.

To enter the dc voltage mode, press the Offset key or any key in the top row

of function keys and hold it down for more than 2 seconds. The displayed

voltage is either the power-on value or the previous offset voltage selected.

DCV

+0.000 VDC

Enter Number

2 Enter the magnitude of the desired voltage.

Notice that the Num annunciator turns on and “ENTER NUM” flashes on

the display, indicating that the number mode is enabled.

155

To cancel the number mode, press Shift Cancel .

Shift

3 Set the units to the desired value.

kHz

m Vrms

At this point, the function generator outputs the displayed dc voltage.

Notice that the Offset annunciator turns on (all other annunciators are

off), indicating that a dc voltage is being output. The annunciator will

turn on when the offset is any value other than 0 volts.

+155.0 mVDC

You can also use the knob and arrow keys to enter a number.

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Chapter 2 Quick Start

To store the instrument state

You can store up to three different instrument states in non-volatile

memory. This enables you to recall the entire instrument configuration

with just a few key presses from the front panel. The following steps show

you how to store and recall a state.

1 Set up the function generator to the desired configuration.

The state storage feature “remembers” the function, frequency,

amplitude, dc offset, duty cycle, as well as any modulation parameters.

Shift

Store

2 Turn on the state storage mode.

Three memory locations (numbered 1, 2, and 3) are available to store

instrument configurations. The instrument configuration is stored in

non-volatile memory and is remembered when power has been off.

STORE 1

This message appears on the display for approximately 10 seconds.

Repeat this step as needed.

3 Store the instrument state in memory location “2”.

Use the up and down arrow keys to select the memory location.

STORE 2

To cancel the store operation, press Shift Store again or let the display

time-out after 10 seconds.

Enter

4 Save the instrument state.

The instrument state is now stored. To recall the stored state, turn to the

next page.

You can also use the knob or “enter number” mode to enter a memory location.

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Chapter 2 Quick Start

To store the instrument state

To verify that the state was stored properly, you can turn the power off

before recalling the state.

Recall

5 Recall the stored instrument state.

To recall the stored state, you must use the same memory location used

previously to store the state. Use the up and down arrow keys to change

the displayed storage location.

RECALL 2

To cancel the restore operation, press Recall again.

This message appears on the display for approximately 10 seconds.

Repeat this step as needed.

Enter

6 Restore the instrument state.

The function generator should now be configured in the same state as

when you stored the setup on the previous page.

When power is turned off, the function generator automatically stores

its state in memory location “0”. You can recall the power-down state,

but you cannot store the state to location “0” from the front panel.

Use the POWER ON ENABLE command in the SYS MENU to

automatically recall the power-down state when power is turned on.

See chapter 3 for more information on using the front-panel menus.

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Chapter 2 Quick Start

To rack mount the function generator

You can mount the function generator in a standard 19-inch rack

cabinet using one of three optional kits available. Instructions and

mounting hardware are included with each rack-mounting kit.

Any Agilent System II instrument of the same size can be rack-mounted

beside the 33120A Function Generator.

Remove the carrying handle, and the front and rear rubber bumpers,

before rack-mounting the function generator.

To remove the handle, rotate it to the vertical position and pull the ends outward.

Front

Rear (bottom view)

To remove the rubber bumper, stretch a corner and then slide it off.

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Chapter 2 Quick Start

To rack mount the function generator

To rack mount a single instrument, order adapter kit 5063-9240.

To rack mount two instruments side-by-side, order lock-link kit 5061-9694

and flange kit 5063-9212.

To install one or two instruments in a sliding support shelf, order shelf 5063-9255,

and slide kit 1494-0015 (for a single instrument, also order filler panel 5002-3999).

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Front-Panel

Menu Operation

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Front-Panel Menu Operation

By now you should be familiar with some of the basic features of the front

panel. Chapter 2 shows you how to prepare the function generator for use

and describes a few of the front-panel features. If you are not familiar

with this information, we recommend that you read chapter 2, “Quick Start,”

starting on page 19.

Chapter 3 introduces you to the use of the front-panel menu. This chapter

does not give a detailed description of every front-panel key or menu

operation. It does, however, give you an overview of front-panel menu

operations related to verification, adjustment and service. See chapter 3

“Features and Functions” in the User’s Guide for a complete discussion of

the function generator’s capabilities and operation.

If you purchased the Phase-Lock Option for the 33120A, an additional

menu (G: PHASE MENU) is available from the front panel. For inform-

ation on using the Phase-Lock Option, refer to the User’s and Service

Guide included with Option 001.

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Chapter 3 Front-Panel Menu Operation

Front-panel menu reference

A: MODulation MENU

1: AM SHAPE Õ 2: AM SOURCE Õ 3: FM SHAPE Õ 4: BURST CNT Õ 5: BURST RATE Õ

Õ 6: BURST PHAS Õ 7: BURST SRC Õ 8: FSK FREQ Õ 9: FSK RATE Õ 10: FSK SRC

1: AM SHAPE

2: AM SOURCE

3: FM SHAPE

4: BURST CNT

5: BURST RATE

6: BURST PHAS

7: BURST SRQ

8: FSK FREQ

9: FSK RATE

Selects the shape of the AM modulating waveform.

Enables or disables the internal AM modulating source.

Selects the shape of the FM modulating waveform.

Sets the number of cycles per burst (1 to 50,000 cycles).

Sets the burst rate in Hz for an internal burst source.

Sets the starting phase angle of a burst (-360 to +360 degrees).

Selects an internal or external gate source for burst modulation.

Sets the FSK “hop” frequency.

Selects the internal FSK rate between the carrier and FSK frequency.

Selects an internal or external source for the FSK rate.

10: FSK SRC

B: SWP (Sweep) MENU

1: START F Õ 2: STOP F Õ 3: SWP TIME Õ 4: SWP MODE

1: START F

2: STOP F

3: SWP TIME

4: SWP MODE

Sets the start frequency in Hz for sweeping.

Sets the stop frequency in Hz for sweeping.

Sets the repetition rate in seconds for sweeping.

Selects linear or logarithmic sweeping.

C: EDIT MENU *

1: NEW ARB Õ 2: POINTS Õ [3: LINE EDIT] Õ [4: POINT EDIT] Õ [5: INVERT] Õ [6: SAVE AS] Õ 7:DELETE

1: NEW ARB

2: POINTS

3: LINE EDIT

4: POINT EDIT

5: INVERT

6: SAVE AS

7: DELETE

Initiates a new arb waveform or loads the selected arb waveform.

Sets the number of points in a new arb waveform (8 to 16,000 points).

Performs a linear interpolation between two points in the arb waveform.

Edits the individual points of the selected arb waveform.

Inverts the selected arb waveform by changing the sign of each point.

Saves the current arb waveform in non-volatile memory.

Deletes the selected arb waveform from non-volatile memory.

* The commands enclosed in square brackets ( [ ] ) are “hidden” until you make a selection from the NEW ARB

command to initiate a new edit session.

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Chapter 3 Front-Panel Menu Operation

Front-panel menu reference

D: SYStem MENU

1: OUT TERM Õ 2: POWER ON Õ 3: ERROR Õ 4: TEST Õ 5: COMMA Õ 6:REVISION

1: OUT TERM

2: POWER ON

3: ERROR

Selects the output termination (50 or high impedance).

Enables or disables automatic power-up in power-down state “0”.

Retrieves errors from the error queue (up to 20 errors).

Performs a complete self-test.

4: TEST

5: COMMA

6: REVISION

Enables or disables a comma separator between digits on the display.

Displays the function generator’s firmware revision codes.

E: Input / Output MENU

1: HPIB ADDR Õ 2: INTERFACE Õ 3: BAUD RATE Õ 4: PARITY Õ 5: LANGUAGE

1: HPIB ADDR

2: INTERFACE

3: BAUD RATE

4: PARITY

Sets the GPIB bus address (0 to 30).

Selects the GPIB or RS-232 interface.

Selects the baud rate for RS-232 operation.

Selects even, odd, or no parity for RS-232 operation.

Verifies the interface language: SCPI.

5: LANGUAGE

F: CALibration MENU *

1: SECURED Õ [1: UNSECURED] Õ [2: CALIBRATE] Õ 3: CAL COUNT Õ 4: MESSAGE

1: SECURED

The function generator is secured against calibration; enter code to unsecure.

The function generator is unsecured for calibration; enter code to secure.

Performs individual calibrations; must be UNSECURED.

Reads the total number of times the function generator has been calibrated.

Reads the calibration string (up to 11 characters) entered from remote.

1: UNSECURED

2: CALIBRATE

3: CAL COUNT

4: MESSAGE

* The commands enclosed in square brackets ( [ ] ) are “hidden” unless the function generator is UNSECURED for

calibration.

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Chapter 3 Front-Panel Menu Operation

A front-panel menu tutorial

This section is a step-by-step tutorial which shows you how to use the

front-panel menu. We recommend that you spend a few minutes with this

tutorial to get comfortable with the structure and operation of the menu

before attempting verification, calibration, or adjustments.

The menu is organized in a top-down tree structure with three levels

(menus, commands, and parameters). You move down

or up

the menu tree to get from one level to the next. Each of the three levels

has several horizontal choices which you can view by moving left

or right > .

Menus

Commands

Parameters

The menu is organized in a top-down tree structure with three levels.

œ To turn on the menu, press Shift Menu On/Off .

œ To turn off the menu, press Shift Menu On/Off .

œ To execute a menu command, press Enter .

œ To recall the last menu command that was executed,

press Shift Recall Menu .

œ To turn off the menu at any time without saving changes,

press Shift Cancel .

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Chapter 3 Front-Panel Menu Operation

A front-panel menu tutorial

Messages Displayed During Menu Use

TOP OF MENU You pressed

while on the “MENUS” level; this is the top

level of the menu and you cannot go any higher.

To turn off the menu, press Shift Menu On/Off . To move across the choices on

a level, press

. To move down a level, press

MENUS You are on the “MENUS” level. Press < or

to view the choices.

COMMANDS You are on the “COMMANDS” level. Press < or > to view the

command choices within the selected menu group.

PARAMETER You are on the “PARAMETER” level. Press < or > to view

and edit the parameter for the selected command.

MENU BOTTOM You pressed

while on the “PARAMETER” level; this is the

bottom level of the menu and you cannot go any lower.

To turn off the menu, press Shift Menu On/Off . To move up a level, press

ENTERED The change made on the “PARAMETER” level is saved. This is

displayed after you press Enter (Menu Enter) to execute the command.

MIN VALUE The value you specified on the “PARAMETER” level is too small for

the selected command. The minimum value allowed is displayed for you to edit.

MAX VALUE The value you specified on the “PARAMETER” level is too large for

the selected command. The maximum value allowed is displayed for you to edit.

EXITING You will see this message if you turn off the menu by pressing

Shift Menu On/Off or Shift Cancel . You did not edit any values on the

“PARAMETER” level and changes were NOT saved.

NOT ENTERED You will see this message if you turn off the menu by pressing

Shift Menu On/Off or Shift Cancel . You did some editing of parameters but

the changes were NOT saved. Press Enter (Menu Enter) to save changes

made on the “PARAMETER” level.

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Chapter 3 Front-Panel Menu Operation

A front-panel menu tutorial

Menu Example 1

The following steps show you how to turn on the menu, move up and

down between levels, move across the choices on each level, and turn off

the menu. In this example, you will restore the function generator to the

power-on default state. This procedure is recommended before performing

the verification procedures in chapter 4.

Shift

1 Turn on the menu.

Menu On/Off

You enter the menu on the “MENUS” level. The MOD MENU is your first

choice on this level.

A: MOD MENU

2 Move across to the SYS MENU choice on this level.

There are six menu group choices available on the “MENUS” level. Each

choice has a letter prefix for easy identification (A: , B: , etc.).

D: SYS MENU

3 Move down to the “COMMANDS” level within the SYS MENU.

The OUT TERM command is your first choice on this level.

1: OUT TERM

4 Move across to the POWER ON command on this level.

There are six command choices available in the SYS MENU. Each choice

on this level has a number prefix for easy identification (1: , 2: , etc.).

2: POWER ON

You can also use the knob to scroll left or right through the choices on each

level of the menu.

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Chapter 3 Front-Panel Menu Operation

A front-panel menu tutorial

5 Move down a level to the “PARAMETER” choices.

The first parameter choice is “DEFAULT” for the POWER ON command

(“DEFAULT” is the factory setting and is stored in non-volatile memory).

DEFAULT

6 Move across to the “LAST STATE” choice.

There are two parameter choices for POWER ON.

LAST STATE

Enter

7 Save the change and turn off the menu.

The function generator beeps and displays a message to show that the

change is now in effect. You are then exited from the menu.

ENTERED

8 Cycle the power to restore the default values.

Turn the function generator OFF and then ON. The default output

state will now be in effect (1 kHz sine wave, 100 mV peak-to-peak,

50W termination).

You can also use the knob to scroll left or right through the choices on each

level of the menu.

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Chapter 3 Front-Panel Menu Operation

A front-panel menu tutorial

Menu Example 2

Some commands in the menu require that you enter a numeric

parameter value. The following steps show you how to enter a number in

the menu. For this example, you will change the output amplitude.

Ampl

1 Select amplitude adjustment

The function generator displays the current output amplitude.

100.0 mVPP

2 Move the flashing cursor over to edit the first digit.

The cursor movement wraps around.

100.0 mVPP

3 Increment the first digit until 300.0 mVPP is displayed.

The output amplitude of the function changes as you adjust the

displayed value.

300.0 mVPP

You can also use the knob and arrow keys to enter a number.

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Chapter 3 Front-Panel Menu Operation

To select the output termination

The function generator has a fixed output impedance of 50 ohms on the

OUTPUT terminal. You can specify whether you are terminating the

output into a 50W load or an open circuit. Incorrect impedance matching

between the source and load will result in an output amplitude or dc offset

which does not match the specified value.

Shift

1 Turn on the menu.

Menu On/Off

A: MOD MENU

2 Move across to the SYS MENU choice on this level.

D: SYS MENU

3 Move down a level to the OUT TERM command.

1: OUT TERM

Move down a level and then across to the HIGH Z choice.

With the output termination set to “HIGH Z”, the function generator

allows you to set the unloaded (open circuit) output voltage.

HIGH Z

Enter

5 Save the change and turn off the menu.

The function generator beeps and displays a message to show that the

change is now in effect. You are then exited from the menu.

You can also use the knob to scroll left or right through the choices on each

level of the menu.

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Chapter 3 Front-Panel Menu Operation

To output a modulated waveform

A modulated waveform consists of a carrier and a modulating waveform.

In AM (amplitude modulation), the amplitude of the carrier is varied by

the amplitude of the modulating waveform. For this example, you will

output an AM waveform with 80% modulation depth. The carrier will be a

5 kHz sine wave and the modulating waveform will be a 200 Hz sine wave.

1 Select the function, frequency, and amplitude of the carrier.

For the carrier waveform, you can select a sine, square, triangle, ramp,

or arbitrary waveform. For this example, select a 5 kHz sine wave with

an amplitude of 5 Vpp.

Shift

2 Select AM.

Notice that the AM annunciator turns on.

Shift

3 Use the menu to select the shape of the modulating waveform.

Recall Menu

After you enable the AM function, the “recall menu” key will

automatically take you to the AM SHAPE command in the MOD MENU.

1: AM SHAPE

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Chapter 3 Front-Panel Menu Operation

To output a modulated waveform

4 Move down a level verify that “SINE” is selected.

For the modulating waveform, you can select a sine, square, triangle,

ramp, noise, or arbitrary waveform. For this example, you will modulate

the carrier with a sine waveform. Notice that the AM annunciator flashes,

indicating that the displayed parameter is for AM.

SINE

Enter

5 Save the change and turn off the menu.

The modulating waveform is now a sine waveform.

ENTERED

Shift

Freq

6 Set the modulating frequency to 200 Hz.

Notice that the AM annunciator flashes, indicating that the displayed

frequency is the modulating frequency. Also notice that the modulating

frequency is displayed with fewer digits than the carrier frequency.

MOD 200.0 Hz

This message appears on the display for approximately 10 seconds.

Repeat this step as needed.

Shift

Level

7 Set the modulation depth to 80%.

Notice that the AM annunciator flashes, indicating that the displayed

percentage is the AM depth (also called percent modulation).

080 % DEPTH

This message appears on the display for approximately 10 seconds.

Repeat this step as needed.

At this point, the function generator outputs the AM waveform with the

specified modulation parameters.

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Chapter 3 Front-Panel Menu Operation

To unsecure the function generator for calibration

The function generator can use a calibration security code to prevent

unauthorized or accidental calibration. This procedure shows you how to

unsecure the function generator for calibration.

Shift

1 Turn on the menu.

Menu On/Off

A: MOD MENU

2 Move across to the CAL MENU choice on this level.

F: CAL MENU

3 Move down a level to the SECURED command.

1: SECURED

If the display shows UNSECURED, you do not need to perform this

procedure to execute a calibration.

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Chapter 3 Front-Panel Menu Operation

To unsecure the function generator for calibration

4 Move down to the “parameters” level.

^000000:CODE

5 Unsecure the function generator by entering the security code.

ENTER

^033120:CODE

The security code is set to “HP33120” when the function generator is

shipped from the factory. The security code is stored in non-volatile

memory and does not change when the power has been off or after a

remote interface reset.

To enter the security code from the front panel, enter only the six digits.

To enter the security code from the remote interface, you may enter up to

12 characters. Use the knob or arrow keys to move left or right between

digits. Use the up or down arrow keys to change the digits.

To re-secure the function generator following a calibration, perform this

procedure again.

Additional information about the calibration security feature is given

on page 64.

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Calibration

Procedures

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Calibration Procedures

This chapter contains procedures for verification of the function

generator’s performance and adjustment (calibration). The chapter is

divided into the following sections:

œ Agilent Calibration Services . . . . . . . . . . . . . . 51

œ Calibration Interval . . . . . . . . . . . . . . . . . . . 51

œ Time Required for Calibration . . . . . . . . . . . . . 51

œ Automating Calibration Procedures . . . . . . . . . . 52

œ Recommended Test Equipment . . . . . . . . . . . . . 52

œ Test Considerations . . . . . . . . . . . . . . . . . . . 53

œ Performance Verification Tests . . . . . . . . . . . . . 54

œ Frequency Verification . . . . . . . . . . . . . . . . . 56

œ Function Gain and Linearity Verification . . . . . . . 56

œ DC Function Offset Verification . . . . . . . . . . . . 57

œ AC Amplitude Verification . . . . . . . . . . . . . . . 57

œ Amplitude Flatness Verification . . . . . . . . . . . . 60

œ AM Modulation Depth Verification . . . . . . . . . . . 61

œ Optional Performance Verification Tests . . . . . . . . 62

œ Calibration Security Code . . . . . . . . . . . . . . . . 64

œ Calibration Count . . . . . . . . . . . . . . . . . . . . 66

œ Calibration Message . . . . . . . . . . . . . . . . . . . 66

œ General Calibration/Adjustment Procedure . . . . . . 67

œ Aborting a Calibration in Progress . . . . . . . . . . . 69

œ Frequency and Burst Rate Adjustment . . . . . . . . 69

œ Function Gain and Linearity Adjustment . . . . . . . 70

œ AC Amplitude Adjustment (High-Z) . . . . . . . . . . 70

œ Modulation Adjustment . . . . . . . . . . . . . . . . . 72

œ AC Amplitude Adjustment (50W) . . . . . . . . . . . . 73

œ DC Output Adjustment . . . . . . . . . . . . . . . . . 76

œ Duty Cycle Adjustment . . . . . . . . . . . . . . . . . 77

œ AC Amplitude Flatness Adjustment . . . . . . . . . . 77

œ Output Amplifier Adjustment (Optional) . . . . . . . 80

œ Error Messages . . . . . . . . . . . . . . . . . . . . . 81

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Chapter 4 Calibration Procedures

Agilent Calibration Services

Closed-Case Electronic Calibration The function generator features

closed-case electronic calibration since no internal mechanical

adjustments are required for normal calibration. The function generator

calculates correction factors based upon the input reference value you set.

The new correction factors are stored in non-volatile memory until the

next calibration adjustment is performed (non-volatile memory does not

change when power has been off or after a remote interface reset).

Agilent Calibration Services

When your function generator is due for calibration, contact your local

Agilent Service Center for a low-cost recalibration. The 33120A Function

Generator is supported on automated calibration systems which allow

Agilent to provide this service at competitive prices. Calibrations to

MIL-STD-45662 are also available at competitive prices.

Calibration Interval

The function generator should be calibrated on a regular interval

determined by the measurement accuracy requirements of your

application. A 1- or 2-year interval is adequate for most applications.

Agilent does not recommend extending calibration intervals beyond

two years for any application.

Whatever calibration interval you select, Agilent recommends that complete

re-adjustment should always be performed at the calibration interval.

This will increase your confidence that the 33120A will remain within

specification for the next calibration interval. This criteria for re-adjustment

provides the best long-term stability. Performance data measured using this

method can be used to extend future calibration intervals.

Time Required for Calibration

The 33120A can be automatically calibrated under computer control.

With computer control you can perform the complete calibration

procedure and performance verification tests in less than 15 minutes.

Manual calibrations using the recommended test equipment will take

approximately 45 minutes.

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Chapter 4 Calibration Procedures

Automating Calibration Procedures

You can automate the complete verification and adjustment procedures

outlined in this chapter if you have access to programmable test

equipment. You can program the instrument configurations specified for

each test over the remote interface. You can then enter readback

verification data into a test program and compare the results to the

appropriate test limit values.

You can also enter calibration constants from the remote interface.

Remote operation is similar to the local front-panel procedure. You can

use a computer to perform the adjustment by first selecting the required

setup. The calibration value is sent to the function generator and then

the calibration is initiated over the remote interface. The function

generator must be unsecured prior to initiating the calibration procedure.

For further detailing on programming the function generator, see

chapters 3 and 4 in the Agilent 33120A User’s Guide.

Recommended Test Equipment

The test equipment recommended for the performance verification and

adjustment procedures is listed below. If the exact instrument is not

available, use the accuracy requirements shown to select substitute

calibration standards.

Instrument

Requirements

Recommended Model

Use*

Q,P,O,T

50 W feedthrough load

50 W – 0.1 W

6 1/2 digit Digital

Multimeter (DMM)

20 Vdc – 0.01%

Integrating ACrms

10 Vacrms – 0.1%

Agilent 34401A

3 Volt

Q,P,T

Q,P

Thermal Voltage Converter

1kHz to 15 MHz

(50 W termination type)

Agilent E4418A with

Agilent 8482A

and 20 dB attenuator

—

100 kHz to 15 MHz

Power Meter

Wideband ACrms Meter

1 VAC rms – 0.5%

1 kHz to 20 MHz

Frequency Meter

Oscilloscope

1 ppm accuracy

100 MHz

Agilent 53131A

Agilent 54624A

Agilent 8560EC

Q,P,T

Spectrum Analyzer

Response to 90 MHz

Q = Quick Verification

P = Performance Verification Tests

O= Optional Verification Tests

T = Troubleshooting

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Chapter 4 Calibration Procedures

Test Considerations

To ensure proper instrument operation, verify that you have selected the

correct power line voltage prior to attempting any test procedure in this

chapter. See page 22 in chapter 2 for more information.

For optimum performance, all test procedures should comply with the

following recommendations:

œ Verify the function generator is set to the default power on state

(power on default). A procedure is given on page 41.

œ Make sure that the calibration ambient temperature is stable and

between 18 •C and 28 •C.

œ Make sure ambient relative humidity is less than 80%.

œ Allow a 1-hour warm-up period before verification or adjustment.

œ Use only RG-58 or equivalent 50W cable.

œ Keep cables as short as possible, consistent with the impedance

requirements.

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Chapter 4 Calibration Procedures

Performance Verification Tests

The performance verification tests use the function generator’s

specifications listed in chapter 1, “Specifications,” starting on page 13.

You can perform four different levels of performance verification tests:

œ Self-Test A series of internal verification tests that give a high

confidence that the function generator is operational.

œ Quick Verification A combination of the internal self-tests and

selected verification tests.

œ Performance Verification Tests An extensive set of tests that are

recommended as an acceptance test when you first receive the function

generator or after performing adjustments.

œ Optional Verification Tests Tests not performed with every

calibration. These tests can can be used to verify additional instrument

specifications following repairs to specific circuits.

Self-Test

A brief power-on self-test occurs automatically whenever you turn on the

function generator. This limited test assures that the function generator

is capable of operation.

To perform a complete self-test hold down the Shift key as you press the

Power switch to turn on the function generator; hold down the key for

more than 5 seconds (a complete description of these tests can be found in

chapter 6). The function generator will automatically perform the

complete self-test procedure when you release the key. The self-test will

complete in approximately 5 seconds.

You can perform many tests individually (or all tests at once) using the

TEST command in the SYS MENU. You can also perform a self-test from

the remote interface (see chapter 3 in the Agilent 33120A User’s Guide).

œ If the self-test is successful, “PASS” is displayed on the front panel.

œ If the self-test fails, “FAIL” is displayed and the ERROR annunciator

turns on. If repair is required, see chapter 6, “Service,” for further details.

œ If all tests pass, you have a high confidence (90%) that the function

generator is operational.

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Chapter 4 Calibration Procedures

Performance Verification Tests

Quick Performance Check

The quick performance check is a combination of internal self-test and an

abbreviated performance test (specified by the letter Q in the performance

verification tests). This test provides a simple method to achieve high

confidence in the function generator’s ability to functionally operate and

meet specifications. These tests represent the absolute minimum set of

performance checks recommended following any service activity.

Auditing the function generator’s performance for the quick check points

(designated by a Q) verifies performance for “normal” accuracy drift

mechanisms. This test does not check for abnormal component failures.

To perform the quick performance check, do the following:

œ Set the function generator to the default power on state (power on default).

A procedure is given on page 41.

œ Perform a complete self-test. A procedure is given on page 21.

œ Perform only the performance verification tests indicated with

the letter Q.

If the function generator fails the quick performance check, adjustment or

repair is required.

Performance Verification Tests

The performance verification tests are recommended as acceptance tests

when you first receive the function generator. The acceptance test results

should be compared against the 1 year test limits. After acceptance, you

should repeat the performance verification tests at every calibration interval.

If the function generator fails performance verification, adjustment or

repair is required.

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Chapter 4 Calibration Procedures

Frequency Verification

This test verifies the frequency accuracy of the two sources in the

function generator. All output frequencies are derived from a single

generated frequency, and only one frequency point is checked.

The second test verifies the burst rate frequency.

Set the function generator for each output indicated in the table below.

Use a frequency meter to measure the output frequency. Compare the

measured results to the test limits shown in the table. This is a 50W

output termination test.

Agilent 33120A

Measurement

OUT ¹

TERM

BURST BURST

Function

Ampl

Freq

Nominal

Error

RATE

CNT

Sine wave

3.5 Vrms 1.00 kHz

—

1.00 kHz

500 Hz

50 W

– 0.02 Hz

– 5 Hz

Square wave

3.5 Vrms 1.00 kHz 500 Hz 1 CYC

Function Gain and Linearity Verification

This test verifies the output amplitude accuracy specification for

sine wave, triangle wave, ramp, and square wave outputs.

Set the function generator for each output indicated in the table below.

Use a DMM to measure the function generator ACrms output voltage.

Compare the measured results to the test limits shown in the table.

This is a HIGH Z output termination test.

Agilent 33120A

OUT TERM ¹

Ampl

Measurement

Function

Sine wave

Freq

Nominal

Error

HIGH Z

7.0 Vrms

5.7 Vrms

10.0 Vrms

8.0 Vrms

1.0 kHz

100 Hz

7.0 Vrms

5.7 Vrms

10.0 Vrms

8.0 Vrms

– 0.07 Vrms

– 0.057 Vrms

– 0.1 Vrms

– 0.08 Vrms

Sine wave

Triangle wave

Ramp wave

Square wave

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W – 0.1W load on output.

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Chapter 4 Calibration Procedures

DC Function Offset Verification

This test verifies the DC offset and DC output specifications.

Set the function generator for each output indicated in the table below.

Use a DMM to measure the function generator dcV output. Compare the

measured results to the test limits shown in the table. This is a HIGH Z

output termination test.

Agilent 33120A

OUT TERM ¹

HIGH Z

Measurement

Function

DC Volts

Ampl

Nominal

Error

10.0 Vdc

-10.0 Vdc

10.0 Vdc

-10.0 Vdc

– 0.20 Vdc

HIGH Z

AC Amplitude Verification

This procedure is used to check the output amplitude calibration of the

function generator. Verification checks are performed to check the

accuracy of the pre-attenuator and post attenuator. Make sure you have

read “Test Considerations” on page 53.

Set the function generator for each output indicated in the table on the

next page. Use a DMM to measure the ACrms output voltage of the

function generator. Compare the measured results to the test limits

shown in the table. This is a HIGH Z output termination test.

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W –0.1W load on output.

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Chapter 4 Calibration Procedures

AC Amplitude Verification

Agilent 33120A

Measurement

Function OUT TERM ¹

Ampl

Freq

Nominal

Error

Sine wave

HIGH Z

7.0 Vrms

1.00 kHz

7.0 Vrms

5.7 Vrms

– 0.070 Vrms

– 0.057 Vrms

– 0.055 Vrms

– 0.044 Vrms

– 0.035 Vrms

– 0.028 Vrms

– 0.022 Vrms

– 0.017 Vrms

– 0.014 Vrms

– 0.011 Vrms

– 0.0088 Vrms

– 0.0070 Vrms

– 0.0055 Vrms

– 0.0044 Vrms

– 0.0035 Vrms

– 0.0028 Vrms

– 0.0022 Vrms

– 0.0017 Vrms

– 0.0014 Vrms

– 0.0011 Vrms

– 0.00088 Vrms

– 0.00070 Vrms

– 0.00055 Vrms

– 0.00044 Vrms

– 0.00036 Vrms

5.7 Vrms

5.5 Vrms

4.4 Vrms

3.5 Vrms

2.8 Vrms

2.2 Vrms

1.7 Vrms

1.4 Vrms

1.4Vrms

1.1 Vrms

0.88 Vrms

0.70 Vrms

0.55 Vrms

0.44 Vrms

0.35 Vrms

0.28 Vrms

0.22 Vrms

0.17 Vrms

0.14 Vrms

0.11 Vrms

0.088 Vrms

0.070 Vrms

0.055 Vrms

0.044 Vrms

0.036 Vrms

0.88 Vrms

0.70 Vrms

0.55 Vrms

0.44 Vrms

0.35 Vrms

0.28 Vrms

0.22 Vrms

0.17 Vrms

0.14 Vrms

0.11 Vrms

0.088Vrms

0.070 Vrms

0.055 Vrms

0.044 Vrms

0.036 Vrms

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W – 0.1W load on output.

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Chapter 4 Calibration Procedures

AC Amplitude Verification

Install the 50W feedthrough load between the DMM and the function

generator output. Set the function generator for each output indicated in

the table on the next page. Use a DMM to measure the ACrms output

voltage of the function generator. Compare the measured results to the

test limits shown in the table. This is a 50W output termination test.

Agilent 33120A

Ampl

Measurement

Function

Sine wave

OUT TERM ¹

50 W

Freq

Nominal

Error

3.5 Vrms

2.8 Vrms

2.2 Vrms

1.7 Vrms

1.4Vrms

1.1 Vrms

1.0000 kHz

3.5 Vrms

2.8 Vrms

– 0.035 Vrms

– 0.028 Vrms

– 0.022 Vrms

– 0.017 Vrms

– 0.014 Vrms

– 0.011 Vrms

– 0.0088 Vrms

– 0.0070 Vrms

– 0.0055 Vrms

– 0.0044 Vrms

– 0.0035 Vrms

– 0.0028 Vrms

– 0.0022 Vrms

– 0.0017 Vrms

– 0.0014 Vrms

– 0.0011 Vrms

– 0.00088 Vrms

– 0.00070 Vrms

– 0.00055 Vrms

– 0.00044 Vrms

– 0.00035 Vrms

– 0.00028 Vrms

– 0.00022 Vrms

– 0.00018 Vrms

2.2 Vrms

1.7 Vrms

1.4Vrms

1.1 Vrms

0.88 Vrms 1.0000 kHz

0.70 Vrms 1.0000 kHz

0.55 Vrms 1.0000 kHz

0.44 Vrms 1.0000 kHz

0.35 Vrms 1.0000 kHz

0.28 Vrms 1.0000 kHz

0.22 Vrms 1.0000 kHz

0.17 Vrms 1.0000 kHz

0.14 Vrms 1.0000 kHz

0.11 Vrms 1.0000 kHz

0.088Vrms 1.0000 kHz

0.070 Vrms 1.0000 kHz

0.055 Vrms 1.0000 kHz

0.044 Vrms 1.0000 kHz

0.035 Vrms 1.0000 kHz

0.028 Vrms 1.0000 kHz

0.022 Vrms 1.0000 kHz

0.018 Vrms 1.0000 kHz

0.88 Vrms

0.70 Vrms

0.55 Vrms

0.44 Vrms

0.35 Vrms

0.28 Vrms

0.22 Vrms

0.17 Vrms

0.14 Vrms

0.11 Vrms

0.088Vrms

0.070 Vrms

0.055 Vrms

0.044 Vrms

0.035 Vrms

0.028 Vrms

0.022 Vrms

0.018 Vrms

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W – 0.1W load on output.

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Chapter 4 Calibration Procedures

Amplitude Flatness Verification

This test verifies the output amplitude flatness specification at selected

frequencies. If you use a TVC (recommended) or a wide band ACrms

voltmeter (with a 50W feed through load), perform this procedure as

described. If you are using a measurement device that requires a transfer

measurement (for example, a power meter), make the transfer in the

reference measurement at 100 kHz.

Set the function generator to the first output indicated in the table below

and make a reference measurement. Select each function generator output

in the table below and adjust the function generator output amplitude until

the measured output is at the reference measurement. Compare the

amplitude level set on the front panel to the test limits shown in the table.

This test is a 50W output termination test.

Agilent 33120A

Measurement

OUT ¹

Function

Ampl

Freq

Nominal

Error

TERM

50 W

Sine wave

3.0 Vrms

1.00 kHz

100.00 kHz

500.00 kHz

1.00 MHz

3.00 MHz

5.00 MHz

7.00 MHz

9.00 MHz

11.00 MHz

13.00 MHz

15.00 MHz

– 0.03 Vrms

– 0.045 Vrms

– 0.06 Vrms

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W –0.1W load on output.

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Chapter 4 Calibration Procedures

AM Modulation Depth Verification

This test verifies the modulation depth specification.

Select each function generator output in the table below. Use a DMM to

measure the function generator ACrms output voltage. Compare the

measured results to the test limits shown in the table. This is a HIGH Z

output termination test.

Agilent 33120A

Measurement

AM Modulation

Shape Freq

OUT ¹

TERM

Function

Ampl

Freq

Depth Nominal

Error

Sine wave HIGH Z 1.0 Vrms 1.00 kHz Sinewave 100 Hz

0.50 Vrms

– 0.005 Vrms

– 0.0061 Vrms

100% 0.61 Vrms

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W – 0.1W load on output.

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Chapter 4 Calibration Procedures

Optional Performance Verification Tests

These tests are not intended to be performed with every calibration.

They are provided as an aid for verifying additional instrument specifications.

Square Wave Duty Cycle Verification

This test verifies the duty cycle specification of the squarewave output.

Select each function generator output in the table below. Use an integrating

DMM to measure the Vdc output of the function generator. Compare the

measured results to the test limits shown in the table. This is a HIGH Z

output termination test.

Agilent 33120A

Measurement

OUT ¹

TERM

Duty

Cycle

Function

Ampl

Freq

Nominal

0.00 Vdc

Error

Square wave HIGH Z

1.0 Vrms

300.00 Hz

50%

– 0.020 Vdc

25% - 0.50 Vdc

75% + 0.50 Vdc

The DMM used for this test must be an integrating multimeter. If the

first step does not measure 0 Vdc, use an oscilloscope for this test.

Do not use an auto-ranging function on the DMM for this test. Fix the

DMM measurement range at 10 Vdc.

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W – 0.1W load on output.

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Chapter 4 Calibration Procedures

Optional Performance Verification Tests

Distortion Verification

This test checks the Harmonic Distortion at selected frequencies and

harmonics. This test requires the use of a spectrum analyzer with

dynamic range, frequency range, and resolution bandwidth adequate for

the measurement.

Select each function generator output in the table below. Use a spectrum

analyzer connected to the function generator output. Set the fundamental

frequency reference to 0 dB and measure the 2nd through 5th harmonic

frequencies relative to this reference. This test is a 50W output

termination test.

Agilent 33120A

Measurement

harmonic

OUT ¹

TERM

Value below

reference

Function

Ampl

Freq

Fundamental 2nd

3rd

4th

5th

Sine wave

1.1 Vrms 20.00 kHz

reference 40 kHz 60 kHz 80 kHz 100 kHz < 70 dB

50 W

1.1 Vrms 100.00 kHz reference 200 kHz 300 kHz 400 kHz 500 kHz < 60 dB

1.1 Vrms 1.00 MHz

reference

2 MHz 3 MHz 4 MHz 5 MHz

< 45 dB

< 35 dB

1.1 Vrms 15.00 MHz reference 30 MHz 45 MHz 60 MHz 75 MHz

Output termination set using front panel controls. HIGH Z assumes no load on

output. 50W assumes a 50W – 0.1W load on output.

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Chapter 4 Calibration Procedures

Calibration Security Code

This feature allows you to enter a security code (electronic key) to prevent

accidental or unauthorized calibrations of the function generator.

When you first receive your function generator, it is secured. Before you

can adjust calibration constants you must unsecure the function generator

by entering the correct security code. A procedure to unsecure the

function generator is given on page 47.

œ The security code is set to “HP033120” when the function generator is

shipped from the factory. The security code is stored in non-volatile

memory, and does not change when power has been off or after a remote

interface reset.

œ To secure the function generator from the remote interface, the security

code may contain up to 12 alphanumeric characters as shown below.

The first character must be a letter, but the remaining characters can be

letters or numbers. You do not have to use all 12 characters but the first

character must always be a letter.

A _ _ _ _ _ _ _ _ _ _ _

(12 characters)

œ To secure the function generator from the remote interface but allow it to

be unsecured from the front panel, use the eight-character format shown

below. The first two characters must be “HP” and the remaining

characters must be numbers. Only the last six characters are recognized

from the front panel, but all eight characters are required. (To unsecure

the function generator from the front panel, omit the “HP” and enter the

remaining numbers.)

H P _ _ _ _ _ _

(8 characters)

œ If you forget your security code, you can disable the security feature by

adding a jumper inside the function generator, and then entering a

new code. See the procedure on the following page.

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Chapter 4 Calibration Procedures

Calibration Security Code

To Unsecure the Function Generator Without the Security Code

To unsecure the function generator without the correct security code,

follow the steps below. A procedure to unsecure the function generator is

given on page 47. Also see “Electrostatic Discharge (ESD) Precautions” in

chapter 6 before beginning this procedure.

SHOCK HAZARD. Only service-trained personnel who are aware

of the hazards involved should remove the instrument covers.

The procedures in this section require that you connect the power

cord to the instrument with the covers removed. To avoid

electrical shock and personal injury, be careful not to touch the

power-line connections.

WARNING

1 Disconnect the power cord and all input connections (front and rear terminals).

2 Remove the instrument cover. Refer to the disassembly drawing on page 130.

3 Connect the power cord and turn on the function generator.

4 Apply a short between the two exposed metal pads on JM101 (located

near U106 and U205) as shown in the figure below.

5 While maintaining the short, enter any unsecure code. The function

generator is now unsecured.

6 Remove the short at JM101.

7 Turn off and reassemble the function generator.

8 The function generator is now unsecured and you can enter a new

security code. Be sure you take note of the new security code.

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Chapter 4 Calibration Procedures

Calibration Count

The calibration count feature provides an independent “serialization” of

your calibrations. You can determine the number of times that your

function generator has been calibrated. By monitoring the calibration

count, you can determine whether an unauthorized calibration has been

performed. Since the value increments by one for each calibration, a

complete calibration increases the value by approximately 85 counts.

œ The calibration count is stored in non-volatile memory and does not

change when power has been off or after a remote interface reset.

Your function generator was calibrated before it left the factory.

When you receive your function generator, read the calibration count

to determine its value.

œ The calibration count increments up to a maximum of 32,767 after which

it wraps around to 0. There is no way provided to program or reset the

calibration count. It is an independent electronic calibration

“serialization” value.

Calibration Message

You can use the calibration message feature to record calibration

information about your function generator. For example, you can store

such information as the last calibration date, the next calibration due

date, the function generator’s serial number, or even the name and phone

number of the person to contact for a new calibration.

You can record information in the calibration message only from the

remote interface. You can read the message from either the front-panel

menu or the remote interface.

œ The calibration message may contain up to 40 characters. The function

generator can display up to 11 characters of the message on the front

panel; any additional characters are truncated.

œ The calibration message is stored in non-volatile memory, and does not

change when power has been off or after a remote interface reset.

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Chapter 4 Calibration Procedures

General Calibration/Adjustment Procedure

The adjustment procedures described in chapter 4 use the CAL MENU to

generate and set internal calibration constants. The general menu

procedure is the same for all calibration setups. The following example

demonstrates making the Frequency and Burst Rate adjustments.

Shift

1 Turn on the menu.

Menu On/Off

A: MOD MENU

2 Move across to the CAL MENU choice on this level.

F: CAL MENU

3 Move down a level to the UNSECURED command.

1: UNSECURED

If the display shows SECURED, you will have to unsecure the function

generator to perform the calibration procedures. A procedure is given on

page 47.

Move across to the CALIBRATE choice.

2: CALIBRATE

5 Move down one level.

The display indicates the calibration setup number. You can change this

number to perform individual specification adjustments.

SETUP 00

Enter

6 Begin the Frequency and Burst Rate adjustment procedure.

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Chapter 4 Calibration Procedures

General Calibration/Adjustment Procedure

7 Move the flashing cursor over the digit to be edited.

8 Change the value in the display to match the measured frequency.

1.000,0040KHz

9 Calculate and save the new value.

CALIBRATING

Enter

10 Perform the next adjustment procedure.

The setup number and function generator output is automatically set for

the next adjustment procedure.

SETUP ^01

You will press ENTER twice for each calibration step, once to select

the setup (as described in step 6) and once to enter the adjustment

(as described in step 9).

You can also use the knob to scroll left or right through the choices on each level of

the menu

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Chapter 4 Calibration Procedures

Aborting a Calibration in Progress

Sometimes it may be necessary to abort a calibration after the procedure

has already been initiated. You can abort a calibration at any time by

pressing any front-panel key (except Shift-Cancel ). When performing a

calibration from the remote interface, you can abort a calibration by

issuing a remote interface device clear message or by pressing the

front-panel LOCAL key.

Frequency and Burst Rate Adjustment

The function generator stores two calibration constants related to

frequency and burst rate output. The constants are calculated from the

adjustment value entered and are stored at the completion of each setup.

1 Use a frequency meter to measure the function generator output

frequency for each setup in the following table. These adjustments use

a 50W output termination.

Nominal Output

SETUP

00 *

FREQUENCY AMPLITUDE

Adjustment for main frequency

generator, sine wave output

1.00 kHz

500 Hz

10 Vpp

Adjustment for burst rate timing,

pulse output.

* A new calibration (SETUP 86 – Rev 4.0) has been added as an alternative to SETUP 00.

The new calibration outputs a 10 MHz sine wave, rather than the 1 kHz signal used for

SETUP 00. The new calibration reduces slew rate dependent errors in the frequency

measurement and is especially important when calibrating the Phase-Lock Assembly

(Option 001). Note that either setup is sufficient to calibrate the carrier frequency and

you don’t need to perform both.

2 Use the CALIBRATE menu to adjust the displayed frequency at each

setup to match the measured frequency and enter the value.

3 Perform the Frequency Verification procedures on page 56.

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Chapter 4 Calibration Procedures

Function Gain and Linearity Adjustment

The function generator stores six calibration constants related to function

gain and linearity. The constants are calculated from the adjustment

value entered. If the calibration procedure is aborted before all setup steps

have been completed, no calibration constants are stored.

1 Use a DMM to measure the function generator ACrms output voltage for

each setup in the following table. These adjustments use a HIGH Z

output termination.

Nominal Output

SETUP

FREQUENCY

1 kHz

AMPLITUDE

7.07 V rms

5.6 V rms

10.0 V rms

1.1 Vrms

Adjustment for sine wave gain.

Adjustment for amplitude linearity.

Adjustment for triangle wave gain.

Adjustment for ramp gain.

1 kHz

100 Hz

Adjustment for square wave gain.

Adjustment for square wave linearity.

2 Use the CALIBRATE menu to adjust the displayed amplitude at each

setup to match the measured amplitude and enter the value.

3 Perform the Function Gain and Linearity Verification procedures on page 56.

AC Amplitude Adjustment (High-Z)

The function generator stores twenty-two calibration constants related to

HIGH Z output, and sixteen calibration constants related to 50W output.

The constants are calculated from the adjustment value entered. The cal-

ibration constants are stored following completion of setup 22 (HIGH Z

output) and the calibration procedure may be aborted after that point.

No calibration constants are stored if the procedures are aborted at any

other setup.

1 Use a DMM to measure the function generator ACrms output voltage for

each setup in the following table. These adjustments use a HIGH Z

output termination.

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Chapter 4 Calibration Procedures

AC Amplitude Adjustment (High-Z)

Nominal Output

SETUP

FREQUENCY AMPLITUDE

Adjustment for:

2 dB Output Attenuator

4 dB Output Attenuator

6 dB Output Attenuator

8 dB Output Attenuator

10 dB Output Attenuator

12 dB Output Attenuator

14 dB Output Attenuator

16 dB Output Attenuator

1 kHz

5.5 V rms

4.4 V rms

3.5 V rms

2.8 V rms

2.2 V rms

1.7 V rms

1.4 V rms

1.1 V rms

0.88 V rms 18 dB Output Attenuator

0.70 V rms 20 dB Output Attenuator

0.55 V rms 22 dB Output Attenuator

0.44 V rms 24 dB Output Attenuator

0.35 V rms 26 dB Output Attenuator

0.28 V rms 28 dB Output Attenuator

0.22 V rms 30 dB Output Attenuator

5.5 V rms

4.4 V rms

3.5 V rms

2.8 V rms

2.2V rms

1.7 V rms

1.4 Vrms

2 dB Pre-attenuator

4 dB Pre-attenuator

6 dB Pre-attenuator

8 dB Pre-attenuator

10 dB Pre-attenuator

12 dB Pre-attenuator

14 dB Pre-attenuator

2 Use the CALIBRATE menu to adjust the displayed amplitude at each

setup to match the measured amplitude and enter the value.

3 Perform the AC Amplitude Verification procedures on page 57.

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Chapter 4 Calibration Procedures

Modulation Adjustment

The function generator stores three calibration constants related to

amplitude modulation depth. The constants are calculated from the

adjustment value entered. If the calibration procedure is aborted before

all setup steps have been completed, no calibration constants are stored.

1 Use a DMM to measure the function generator ACrms output voltage for

each setup in the following table. These adjustments use a HIGH Z

output termination.

Nominal Output

SETUP

FREQUENCY

1 kHz

AMPLITUDE

3.5 Vrms

Adjustment for:

0% modulation depth.

50% modulation depth.

100% modulation depth.

1 kHz

0.707 Vrms

6.36 Vrms

1 kHz

2 Use the CALIBRATE menu to adjust the displayed amplitude at each

setup to match the measured amplitude and enter the value.

3 Perform the AM Modulation Depth Verification procedures on page 61.

NEW CALIBRATION: A new calibration (SETUP 85 – Rev 4.0) has

been added to eliminate a small residual error in the AM amplitude

system which could potentially cause a failure of the AM amplitude

verification. The new calibration operates just like the other AM

calibrations (SETUP 30, 31, 32) in that the external measurement is

AC Vrms with no load. The new calibration is not allowed until the

other AM gain calibrations (SETUP 30, 31, 32) are performed.

The new algorithm is designed such that the calibration should not be

required again once the function generator has been calibrated at the

factory. However, if you change any critical analog components which

determine amplitude in AM modulation, you should perform the

calibration again.

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Chapter 4 Calibration Procedures

AC Amplitude Adjustment (50W)

1 The function generator stores 16 calibration constants related to 50W

output. The constants are calculated from the adjustment value entered.

The calibration constants are stored following completion of setup 49 and

the calibration procedure may be aborted after that point. No calibration

constants are stored if the procedures are aborted at any other setup.

Use the DMM to measure the resistance of a 50W feedthrough load.

Record the measurement for step 3. You can measure the load and cable

resistance (recommended procedure) or just the load as shown below.

3 Enter the following setup and use the calibrate menu to enter the

measured value of the 50W feedthrough load (and cable). This number

will be used to calculate the 50W output amplitude calibration constants.

Nominal Input

SETUP

LOAD Z

Enter measured value of load.

50 W

Once the value of the 50W load and cable are entered, use the SAME

load and cable for all 50W tests.

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Chapter 4 Calibration Procedures

AC Amplitude Adjustment (50W)

4 Use the DMM to measure the function generator ACrms output voltage

for each setup in the table on the next page. These adjustments use the

50W load and cable measured in step 2 and connected as shown below.

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Chapter 4 Calibration Procedures

AC Amplitude Adjustment (50W)

Nominal Output

FREQUENCY AMPLITUDE

SETUP

Adjustment for:

0 dB Output Attenuator

2 dB Output Attenuator

4 dB Output Attenuator

6 dB Output Attenuator

8 dB Output Attenuator

10 dB Output Attenuator

12 dB Output Attenuator

14 dB Output Attenuator

16 dB Output Attenuator

18 dB Output Attenuator

20 dB Output Attenuator

22 dB Output Attenuator

24 dB Output Attenuator

26 dB Output Attenuator

28 dB Output Attenuator

30 dB Output Attenuator

1 kHz

3.5 Vrms

2.8 Vrms

2.23 Vrms

1.77 Vrms

1.41 Vrms

1.12 Vrms

.887 Vrms

.704 Vrms

.559 Vrms

.442 Vrms

.350 Vrms

.281 Vrms

.223 Vrms

.177 Vrms

.141 Vrms

.112 Vrms

5 Use the CALIBRATE menu to adjust the displayed amplitude at each

setup to match the measured amplitude and enter the value.

6 Perform the AC Amplitude Verification procedures beginning on page 57.

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Chapter 4 Calibration Procedures

DC Output Adjustment

The function generator stores nine calibration constants related to

DC volts output. The constants are calculated from the adjustment value

entered. The calibration constants are stored following completion of

setup 59. No calibration constants are stored if the procedures are aborted

at any other setup.

1 Use a DMM to measure the function generator dcV output voltage for

each setup in the following table. These adjustments use a HIGH Z

output termination.

Nominal Output

SETUP

DC Volts

- 8.0 Vdc

8.0 Vdc

0.0 Vdc

Adjustment for:

Negative offset gain

Positive offset gain

AM offset

2 dB Pre-attenuator offset.

4 dB Pre-attenuator offset.

6 dB Pre-attenuator offset.

8 dB Pre-attenuator offset.

10 dB Pre-attenuator offset.

12 dB Pre-attenuator offset.

14 dB Pre-attenuator offset.

2 Use the CALIBRATE menu to adjust the displayed output voltage at

each setup to match the measured voltage and enter the value.

3 Perform the DC Function Offset Verification procedures on page 57.

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Chapter 4 Calibration Procedures

Duty Cycle Adjustment

The function generator stores two calibration constants related to

squarewave offset and two calibration constants related to squarewave

duty cycle. The constants are calculated from the adjustment value

entered. The calibration constants are stored following completion of

setup 63. No calibration constants are stored if the procedures are aborted

at any other setup.

1 Use a DMM to measure the function generator dcV output voltage for

each setup in the following table. These adjustments use a HIGH Z

output termination.

For this test, the DMM must be set to a fixed range capable of measuring

from +10 V to -10 V. Do not use an auto-ranging function for this test.

Nominal Output

SETUP

FREQUENCY AMPLITUDE

—

10.0 Vdc

-10.0 Vdc

0.0 Vdc

Positive squarewave offset.

Negative squarewave offset.

50% duty cycle squarewave.

75% duty cycle squarewave

—

300 Hz

5.0 Vdc

2 Use the CALIBRATE menu to adjust the displayed output voltage at

each setup to match the measured voltage and enter the value.

3 Perform the Squarewave Duty Cycle Verification procedures on page 62.

AC Amplitude Flatness Adjustment

The function generator stores eleven calibration constants related to AC

Amplitude Flatness from 1 kHz to 15 MHz. The constants are calculated

from the adjustment value entered and one of two calculation constants

related to the type of measurement device you are using. The calibration

constants are stored following completion of setup 82. No calibration

constants are stored if the procedures are aborted at any other setup.

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Chapter 4 Calibration Procedures

AC Amplitude Flatness Adjustment

This procedure can be performed with one of three types of measurement

device; a broadband ACrms voltmeter, a power meter, or a thermal

voltage converter. The procedure differs slightly depending upon the type

of measurement device used. These adjustments us a 50W output termination.

1 Use a DMM to measure the ACrms output voltage of the function generator

and enter the measurement value for the setup in the table below.

Nominal Output

SETUP

FREQUENCY AMPLITUDE

1 kHz 3.0 V rms

Reference for:

1 kHz flatness DAC gain

2 a. If you are using a broadband ACrms voltmeter, proceed to step 3.

b. If you are using a power meter capable of measurements at 1 kHz,

use the power meter to measure the function generator output and enter

the value for the setup in the table below. (If your power meter does not

measure to 1 kHz, see the transfer measurement procedure below.)

Nominal Output

SETUP

FREQUENCY AMPLITUDE

1 kHz 3.0 V rms

Reference for:

V rms, dBm

Transfer Measurement Procedure

If you are using a power meter not capable of measurement to 1 kHz,

you can perform the transfer measurement at a different frequency.

For example, the Agilent E4418A Power Meter with the Agilent 8482A

probe and 20 dB attenuator are specified to a low frequency of 100 kHz.

To use this measurement device, perform step 1, then use setup 65 to

obtain a 100 kHz output. Measure the output with the power meter and

record the measured value. Perform setup 83 and enter the recorded

value (not a new measurement). Then, perform step 3 (you will use setup

65 twice). This procedure assumes the output of the function generator is

flat from 1 kHz to 100 kHz.

c. If you are using a Thermal Voltage Converter (TVC), use the TVC to

measure the function generator output and enter the measurement for

the setup in the table below (TVC values entered are in mVdc).

Nominal Output

SETUP

FREQUENCY AMPLITUDE

1 kHz 3.0 V rms

Reference for:

Thermal Voltage Converter

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Chapter 4 Calibration Procedures

AC Amplitude Flatness Adjustment

3 For each setup in the table below, use the CALIBRATE command to

change the displayed amplitude to match the measured amplitude.

Nominal Output

SETUP

FREQUENCY AMPLITUDE

Adjustment for:

100 kHz

500 kHz

1 MHz

3.0 V rms

100 kHz amplitude flatness

500 kHz amplitude flatness

1 MHz amplitude flatness

3 MHz amplitude flatness

5 MHz amplitude flatness

7 MHz amplitude flatness

9 MHz amplitude flatness

10 MHz amplitude flatness

10.5 MHz amplitude flatness

11 MHz amplitude flatness

11.5 MHz amplitude flatness

12 MHz amplitude flatness

12.5 MHz amplitude flatness

13 MHz amplitude flatness

13.5 MHz amplitude flatness

14 MHz amplitude flatness

14.5 MHz amplitude flatness

15 MHz amplitude flatness

3 MHz

5 MHz

7 MHz

9 MHz

10 MHz

10.5 MHz

11 MHz

11.5 MHz

12 MHz

12.5 MHz

13 MHz

13.5 MHz

14 MHz

14.5 MHz

15 MHz

4 Perform the Amplitude Flatness Verification procedures on page 60.

Shift

Menu On/Off

Completion of adjustment procedures. Return the function generator

to the normal operating mode.

EXITING

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Chapter 4 Calibration Procedures

Output Amplifier Adjustment (Optional)

This adjustment procedure should only be performed following repairs to

the Output Amplifier circuitry. The adjustment improves the high frequency

performance of the Output Amplifier.

1 Remove the function generator power and cover as described on page 130.

2 Use a DMM to measure the ACrms voltage across J701 as shown below.

Cable Shield is

Circuit Ground

3 Turn on the function generator.

4 Set the function generator for a 1 kHz, 1V rms, sine wave output.

5 Adjust R710 for a minimum reading on the voltmeter. Typical readings

are less than 0.005 Vrms.

6 Replace the covers as described on page 130.

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Chapter 4 Calibration Procedures

Error Messages

The following tables are abbreviated lists of function generator’s error

messages. They are intended to include errors which are likely to be

encountered during the procedures described in this chapter. For a more

complete list of error messages and descriptions, see chapter 5 in the

Agilent 33120A User’s Guide.

System Error Messages

Error

Error Message

-330

-350

501

502

511

512

513

514

521

522

550

Self-test Failed

Too many errors

Isolator UART framing error

Isolator UART overrun error

RS-232 framing error

RS-232 overrun error

RS-232 parity error

Command allowed only with RS-232

Input buffer overflow

Output buffer overflow

Command not allowed in Local

Self-Test Error Messages

Error

601

602

603

604

605

606

607

608

625

626

627

Error Message

Front panel does not respond

RAM read/write fail

Waveform RAM readback failed

Modulation RAM readback failed

Serial configuration readback failed

Waveform ASIC failed

SYNC signal detection failure

I/O Processor not responding

I/O Processor failed self-test

I/O Processor reset; possible low power line voltage

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Chapter 4 Calibration Procedures

Error Messages

Calibration Error Messages

Error

Error Message

701

702

703

704

705

706

707

708

709

760

850

851

852

853

854

855

856

857

858

Cal security disabled by jumper

Cal secured

Invalid secure code

Secure code too long

Cal aborted

Cal value out of range

Cal signal measurement out of range

Flatness cal failed

Cannot calibrate frequency while externally locked (Option 001)

RAM checksum failure

Cal setup invalid

Negative offset gain cal required (CAL:SETup 50)

Flatness DAC gain cal required (CAL:SETup 64)

AM cal 1 required (CAL:SETup 30)

AM cal 2 required (CAL:SETup 31)

Cal load resistance not specified (CAL:SETup 33)

Square wave positive offset cal required (CAL:SETup 60)

Square wave 50% duty cycle cal required (CAL:SETup 62)

AM cal 3 required (CAL:SETup 32)

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Theory of

Operation

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Theory of Operation

This chapter is organized to provide descriptions of the circuitry

contained on the schematics shown in chapter 8. A block diagram

overview is provided followed by more detailed descriptions of the

circuitry contained in the schematics chapter.

œ Block Diagram Overview . . . . . . . . . . . . . . . . 85

œ Output Attenuator . . . . . . . . . . . . . . . . . . . 86

œ Output Amplifier . . . . . . . . . . . . . . . . . . . . 87

œ AM Modulation . . . . . . . . . . . . . . . . . . . . . 89

œ Pre-attenuator . . . . . . . . . . . . . . . . . . . . . . 90

œ Square Wave and Sync . . . . . . . . . . . . . . . . . 90

œ Filters . . . . . . . . . . . . . . . . . . . . . . . . . . 92

œ Waveform DAC/Amplitude Leveling/Waveform RAM . . 93

œ Direct Digital Synthesis (DDS ASIC) . . . . . . . . . 95

œ System DACs . . . . . . . . . . . . . . . . . . . . . . 96

œ Floating Logic . . . . . . . . . . . . . . . . . . . . . . 97

œ Earth-Referenced Logic . . . . . . . . . . . . . . . . . 98

œ Power Supplies . . . . . . . . . . . . . . . . . . . . . 98

œ Display and Keyboard . . . . . . . . . . . . . . . . . . 100

The self-test procedures are described in chapter 6.

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Chapter 5 Theory of Operation

Block Diagram Overview

This discussion pertains to the block diagram shown on page 129.

The function function generator’s circuitry is divided into two major

blocks: the floating section and the earth (ground) reference section.

All signal generation, control, and display functions are contained in

the floating section. This section also contains the function generator’s

main CPU.

The floating section can be viewed in two pieces; the analog signal

conditioning section (System DAC, Filters, Sync, Square wave,

Pre-Attenuator, Output Amp, and Output Attenuator) and the digital

logic section (Floating Logic, Digital Waveform Data Synthesis, and

Waveform DAC).

All signal generation, level control, and modulation functions are

performed in the floating section. The waveform DAC generates two

outputs, normal and inverted, between approximately 800 mVp-p and

1 Vp-p. The DAC outputs are routed through anti-alias low-pass filters to

eliminate higher frequency sampling products. The nominal x10 gain of

the output amplifier, combined with preattenuator and output attenuator

settings, are chosen such that the desired output amplitude is produced.

The ground reference section uses a processor configured as a slave to the

main CPU. This processor establishes external I/O communication with

the main CPU through a bi-directional, optically isolated, serial

communications link. The earth referenced processor controls low-level

GPIB (IEEE-488) and RS-232 interface operation. The ground referenced,

rear panel external trigger input uses a dedicated optical isolator to

couple a trigger signal to the main CPU in the floating section.

Separate power supplies are provided for the floating and ground

reference sections. The front panel operates from the floating section with

its logic common different from the CPU logic common.

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Chapter 5 Theory of Operation

Output Attenuator

Block 8 on block diagram page 129; Schematic on page 138.

The Output Attenuator provides 0 to 30 dB of signal attenuation between

the output amplifier section and the output BNC connector. Output signal

levels are controlled by combining coarse amplitude control from the

output attenuator section and pre-attenuator section with fine amplitude

control from the Waveform DAC AMP_CTL signal.

Four switched output attenuator pads are combined to achieve the desired

signal attenuation as shown in the table below. Relays K801 through

K804 either bypass an attenuator pad or select that attenuator. K801

selects a 2 dB attenuator, K802 selects a 4 dB attenuator, K803 selects

a 8 dB attenuator, and K804 selects a 16 dB attenuator. Relays are

sequenced to provide signal attenuation in 6 dB steps. Intermediate

amplitude levels are controlled by selecting 0 dB, 2 dB or 4 dB of signal

attenuation through the pre-attenuator solid state switches in

combination with reducing the output level of the waveform DAC itself.

The AMP_CTL signal provides smoothly varying control of the Waveform

DAC output level over a 0 dB to -2 dB range. This operation is described

further in the Waveform DAC and System DAC discussions.

Output Attenuation

K801

K802

K803

K804

0 dB

6 dB

12 dB

18 dB

24 dB

30 dB

set

reset

set

reset

set

reset

set

reset

set

reset

set

reset

set

reset

K801 through K804 are latching relays. Their set or reset state is selected

by momentarily pulsing the appropriate coil of the relay. Relay coils are

pulsed with 5 volts for 15 ms through relay drivers U301 and U302.

The main controller, U102, writes data bytes to ASIC U103 which

transmits this data to the relay drivers via the internal 3-wire serial data bus

(SERCLK, SERDAT, and SERSTB) to accomplish the relay state changes.

A 30 MHz filter, composed of L801, C801, and C802, eliminates wideband

noise from the function generator output. The output amplifier and output

attenuators are protected from damage by clamps CR801 and CR802 and

by fuse F801. The function generator is protected from accidental

application of voltages <10 volts for short durations.

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Chapter 5 Theory of Operation

Output Amplifier

Block 7 on block diagram page 129; Schematic on page 137.

The output amplifier drives the function generator’s signal output

through the output attenuator section. The output amplifier exhibits an

approximate 35 MHz bandwidth and 1000 V/ms slew rate. AC signals

originating from the DAC+ and DAC- signal paths are combined at the

input of the amplifier. The output amplifier exhibits a nominal x(-10)

voltage gain from its -AMP_IN input and a nominal x12 voltage gain

from its +AMP_IN input. A dc offset signal, related to the front panel

output offset value, is also summed with the ac signal at the input of the

amplifier. A simplified block diagram of the output amplifier is shown below.

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Chapter 5 Theory of Operation

Output Amplifier

The block diagram shows four basic stages: dc amplifier, input differential

amplifier, gain, and power output. The amplifier’s input differential

amplifier stage and gain stage are symmetrical. The +AMP_IN and

-AMP_IN inputs are both amplified through complementary amplifiers

whose outputs are summed together at the input of the power output

stage. Transistors Q701, Q702, Q704 and Q707 form the complementary

input differential amplifiers. Q708 and Q705 are current sources which

provide bias to the input differential amplifiers. Q709 and Q710 are

emitter follower amplifiers used to couple the respective differential

amplifier outputs to the gain stage transistors Q711 and Q715 which

provide virtually all of the amplifiers open loop gain (~ x1000).

The power output stage is a wideband, class C buffer amplifier. Emitter

followers Q714 and Q716 buffer the gain stage output from loading by the

power output emitter follower transistors Q713 and Q718. Idle current

bias for these power output transistors is set by the ratios of R732, R726

and transistor matching between Q713, Q714 and their equivalents in

the other half of the stage: R734, R727 and Q718, Q716. Transistors Q712

and Q717 are current sources which provide bias to emitter followers

Q714 and Q716 respectively.

The low frequency and dc performance of the amplifier is controlled by

U702. This amplifier is used to sense the dc offset present at the

+AMP_IN and -AMP_IN inputs and servo the output amplifier dc offset

to zero volts; to the limit of U702’s own dc offset performance. U702 also

provides a means to add a desired dc offset value into the output signal

path through the x (-1) gain of the OUT_OFFSET signal.

The output amplifier employs a current feedback technique to set the

closed-loop gain. The emitters of Q701 and Q702 are the virtual summing

node points in the amplifier. Amplifier closed loop gain is controlled

predominately by the following ratios:

R740

R715

R710

R716

R717

R740

R719

R710

R720

R711

and

Variable resistor R710 is used to match the gain through the high frequency

feedback path (described above) and the dc feedback path summed

through resistors R705, R706. The feedback signal current is injected into

the amplifier through the emitters of Q701 and Q702 respectively.

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Chapter 5 Theory of Operation

AM Modulation

Blocks 3 and 6 on block diagram page 129; Schematics on pages 136 and 133.

Amplitude modulation is performed by analog multiplier U603 combining

the AM_IN and +FUNCTION and -FUNCTION signals. Modulation depths

from 0% to 120% are set by varying the signal at AM_IN.

When the amplitude modulation function is selected, the output of U603

is switched into the +AMP_IN signal path by K602. At the same time,

the -AMP_IN signal path is grounded, cutting the output signal

amplitude in half, to accommodate the more than two times peak signal

levels required by >100% modulation depth.

The AM_IN signal is a combination of any external modulation inputs

applied to the rear panel BNC connector and the internally generated

AM signals. The function generator can internally synthesize an 8-bit

modulation wave shape through DAC U313. Data from any standard or

arbitrary wave shape can be used as the modulating wave shape.

Modulating wave shapes are automatically expanded or compressed in

length, as required, to meet the specified modulating frequency setting.

Changes in the function generator output will lag changes in the

modulating frequency because new modulation data must be computed

and downloaded internally for every frequency change.

The AM_GAIN and AM_OFFSET dc signals are used to calibrate and vary

the am modulation depth settings. AM_GAIN controls the peak-to-peak

output level from U313 in response to modulation depth setting changes.

Likewise, the AM_OFFSET signal varies inversely to the AM_GAIN signal,

as the AM depth setting is varied, to produce a constant signal offset in the

composite AM_IN modulation signal. The net AM_IN offset is independent

of the modulating ac signal component or AM depth setting.

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Chapter 5 Theory of Operation

Pre-attenuator

Block 6 on block diagram page 129; Schematic on page 136.

All signals, except square waves, pass through the preattenuator.

The preattenuator multiplexes eight resistive 2 dB attenuators to provide

attenuation from 0 dB to 14 dB in 2 dB steps. The 0 dB, 2 dB, and 4 dB

attenuation steps are used for level settings between the 6 dB steps

selected in the output attenuator section. Amplitude settings between

these 2 dB steps are set by smoothly varying the Waveform DAC output

level from 0 dB to -2 dB of its nominal level via the AMP_CTL signal.

Output attenuator 6 dB steps, preattenuator 0 dB, 2 dB, and 4 dB steps,

and small variations (0 dB to 2 dB) of the Waveform DAC output level

are combined to produce each amplitude setting.

In the preattenuator, U601 and U602 are operated as 8-to-1 multiplexers,

each providing selectable 2 dB attenuation steps. Because of the gain

imbalance of the output amplifier (x 12 on +AMP_IN and x (-10) on

-AMP_IN), the +signal path U601 has an additional 2 dB attenuation

always present (R601 and R602) to equalize the nominal gains in both

the plus and minus signal paths.

Square Wave and Sync

Block 6 on block diagram page 129, schematic on page 136.

During square wave outputs, a sine wave signal is generated internally

and squared-up by comparator U620. Square wave amplitude control is

accomplished by variable gain amplifier Q603 and Q604 and switched

into the output signal path through relay K601. A simplified diagram of

the square wave generator is shown below.

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Chapter 5 Theory of Operation

Square Wave and Sync

Transistors Q601 and Q602 buffer the output of the sine wave anti-alias

filter to the input of comparator U620. Square wave duty cycles are

controlled by the SQ_SYM input on the inverting input of the comparator.

The squarewave outputs of U620 are amplified by variable gain

amplifiers Q603 and Q604.

The amplifier gain output level is controlled by the variable current

source Q605 and U307D in response to the System DAC dc signal

SW_AMP. Squarewave variable gain amplifier output signal levels are

unbalanced by resistors R643 and R644 to correct for the output

amplifier + and - gain differences as discussed in the preattenuator

section on page 90.

Latching relay K601 connects the square wave into the +FUNCTION

and -FUNCTION paths. The relay set or reset state is selected by

momentarily pulsing the appropriate coil. Relay coils are pulsed with

5 volts for 15 ms through relay driver U301. The main controller, U102,

writes data bytes to ASIC U103 which transmits this data to the relay

drivers via the internal 3-wire serial data bus (SERCLK, SERDAT,

and SERSTB) to accomplish relay state changes.

Multiplexer U604 selects one of five sources for the SYNC output: off,

modulation sync, square wave comparator output, RUN*, or Arbitrary

waveform sync. ARB_SYNC is derived from the WA14 line through

U210B. U215B and U210C control the pulse width of the ARB_SYNC

(arbitrary waveform sync) signal. Square wave sync is taken from the

inverting output of square wave comparator U620. U620 also generates

the MOD_SYNC (modulation sync) through U217. Buffer U621 inverts

the sync signal and provides the output current drive to the SYNC output

BNC connector.

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Chapter 5 Theory of Operation

Filters

Block 5 on block diagram page 129; Schematic on page 135.

The output of the Waveform DAC passes through one of two anti-alias

filters. A 17 MHz 9th order elliptical filter is used for the sine wave and

square wave output functions. A 10 MHz 7th order Bessel filter is used

for filtering all other output functions, including all arbitrary waveshapes.

The diagrams below show the typical frequency response of these filters.

The filters are switched in or out of the signal path by latching relays

K501 and K502. Their set or reset state is selected by momentarily

pulsing the appropriate coil of the relay. Relay coils are pulsed with

5 volts for 15 ms through relay drivers U301 and U302. The main

controller, U102, writes data bytes to ASIC U103 which transmits this data

to the relay drivers via the internal 3-wire serial data bus (SERCLK,

SERDAT, and SERSTB) to accomplish these relay state changes. When

K501 and K502 are set, the 10 MHz Bessel filter is selected.

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Chapter 5 Theory of Operation

Waveform DAC/Amplitude Leveling/Waveform RAM

Block 4 on block diagram page 129; Schematic on page 134.

The Waveform DAC, U407, converts 12-bit digital data from waveform

RAM’s U404 and U405 into positive and negative analog voltages.

A simplified diagram of the Waveform DAC circuitry is shown below.

The preattenuator, filters, and associated circuits in the output signal path

provide an approximate 25W load for the Waveform DAC. The Waveform

DAC nominally produces a 40 mA differential output current — yielding

differential 1 Vac output signals. Wave shape (amplitude) data is loaded

into the waveform RAM by the main controller CPU U102. Once loaded,

these data are addressed by the DDS ASIC. The rate at which addresses

are incremented determines the output waveform frequency. Waveform

RAM output data is latched and shifted to ECL levels by U402 and U403

for input to the waveform digital-to-analog converter (DAC) U407. DDS

ASIC U206, waveform data latches U402 and U403, and the Waveform

DAC U407 are clocked at 40 MHz. The 40 MHz clock is generated by

oscillator U413 and ECL level-shifter U401.

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Chapter 5 Theory of Operation

Waveform DAC/Amplitude Leveling/Waveform RAM

The Waveform DAC voltage reference is driven by U410B. This reference

controls the magnitude of the nominal 0 to -40 mA DAC output current.

The reference level is varied to produce 0 to -2 dB fine amplitude level

control via dc signal AMP_CTL and –2 dB of dynamic amplitude flatness

correction for static and swept frequency operation via flatness correction

dac U409. These reference voltage adjustments are summed together in

amplifier U410B. Amplitude flatness correction data are stored in

calibration memory during calibration. These data are used to produce a

modulation program with corresponding 8-bit amplitude correction data

values which are gated to latch U412 during operation. These data

provide real-time correction of the output amplitude level as frequency

changes are made. Amplifier U408 and Q401 use the waveform DAC

reference voltage to center the waveform DAC output signal near 0 volts.

U404 and U405 are the high-speed waveform RAM. Together, U404 and

U405 form a 16383 x 12-bit RAM. Each RAM stores and outputs 6 bits of

the waveform DAC 12-bit WD data bus. RAM U404 drives the least

significant 4 bits and U405 drive the most significant 8 bits of the WD

data bus. Note that DAC U407 calls D1 the most-significant bit (MSB)

and D12 it’s least-significant bit (LSB). Waveform RAM addresses are

controlled by the DDS ASIC’s WA (waveform address) bus.

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Chapter 5 Theory of Operation

Direct Digital Synthesis (DDS ASIC)

Block 2 on block diagram page 129; Schematic on page 132.

The DDS ASIC, U206, controls the WA (waveform address) and MA

(modulation address) busses. The waveform address is used by the

waveform RAMs U404 and U405. The modulation data bus is used by the

modulation RAM U205.

The DDS ASIC is comprised of several internal registers and addressing

state machines. Instructions are written to the DDS ASIC by the main CPU

via memory mapped control registers U108 and U202. When loading data

into Waveform RAM or Modulation RAM, addresses on the WA and MA

busses are incremented by ASIC U206. ASIC addresses are incremented

by each rising edge of the TRIG line while writing data into these RAM.

The state of the HOST_RQ* line controls whether the main CPU or the

modulation RAM U205 is sourcing instructions to the DDS ASIC internal

state machines. The Modulation RAM is loaded with frequency values

and amplitude flatness correction values or AM modulation data for latch

U309 and AM dac U313. Data multiplexer U217 and flip-flop U215 are

used to preselect and synchronize the modulation sync source available to

the SYNC output terminal multiplexer U604.

The external trigger input OGEXT is optically isolated by U213 and

applied to an input of trigger source multiplexer U214. The external

trigger input is used for triggering the start of a frequency sweep or

burst output and for externally gating the output signal on and off

asynchronously. U214 selects one of seven trigger sources for use by

U206 for initiating its internal program.

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Chapter 5 Theory of Operation

System DACs

Block 3 on block diagram page 129; Schematic on page 133.

All output amplitudes are derived from the internal voltage reference of

System DAC U303. The system dac track/hold amplifier outputs are used

to provide controllable bias voltages to various analog circuits including

AM modulation depth, square wave amplitude, square wave duty cycle,

output dc offset, and output amplitude level. The System DAC is

programmed and responds to the main controller via the internal 3-wire

serial data bus SERCLK, SERRBK, and SERSTB. The System DAC is

multiplexed to 7 track/hold amplifiers through U304. Each track/ hold

amplifier is refreshed approximately every 3 ms to maintain its output

setting. Changes to track/hold amplifier outputs are accomplished by

dwelling on that position for an extended period.

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Chapter 5 Theory of Operation

Floating Logic

Block 1 on block diagram page 129; Schematic on page 131.

The floating logic controls the operation of the entire function function

generator. All output functions and bus command interpretation is

performed by the main CPU, U102. The front panel and earth referenced

logic operate as slaves to U102. The main CPU portion of the floating logic

section is clocked from a 12 MHz ceramic resonator, Y101. Non-volatile

EEPROM U106 stores arbitrary waveform data, calibration constants,

calibration secure code, calibration count, and last instrument state.

The main CPU, U102, is a 16-bit micro controller. The 16-bit A (address)

bus and 8-bit AD (address/data) bus are used to provide digital

communication with the 256k byte program ROM U104, 32k byte RAM

U105, 128k byte non-volatile EEPROM U106, 32k byte high speed

Modulation RAM U205, 16k x 12-bit high speed waveform RAM U404

and U405 and DDS ASIC U206.

Gate array U103 provides CPU address latching and memory mapping

functions. There are four internal registers in U103: a configuration

an internal status register. RAM chip select signal RAMCE* and CPU

port bits RAMA13 and RAMA14 are used to access 4 - 8k byte banks of

program data RAM. Similarly, 4 banks of 56k non-volatile EEPROM and

2 banks of 56k non-volatile RAM are gated from CPU port bits PRG16,

PRG17, and WAVA16 and U103 signal ROMCE*. Addresses on the CPU

address bus are valid when the ALE line is high. Memory mapping of

control of registers U107 and U202, DDS ASIC U206, data transceivers

U201, U203, U204, and write enables for RAM U404 and U405 and U205

are controlled by data selector U108.

The U103 serial register controls the front panel, relay drivers U301 and

U302, and System DAC U303 through a serial data bus. Front panel

signals are FPDI, FPSK*, and FPDO. Interrupts from the front panel are

detected by U103 and signaled to U102 by CHINT. The FPINT line from

U102 signals the front panel that U103 has data to send. The internal

3-bit serial data bus (U102) uses SERCK, SERDAT, and SERSTB to send

data to various registers. SERRBK (serial read back) is used by self test

to verify operation of U103, relay drivers U301, U302, and System DAC

shift register U305.

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Chapter 5 Theory of Operation

Earth-Referenced Logic

The main CPU, U102, communicates with the earth referenced logic

through an optically isolated asynchronous serial data link. U101 isolates

the incoming data (OG_RXD*) from the earth referenced logic. Similarly,

U901 isolates the data from U102 (OG_TXD) to the earth reference logic.

Data is sent in an 11-bit frame at a rate of 187.5 k bits/second. When the

RS-232 interface is selected, data is sent across the serial link at 93.75 k

bits/second. The 11-bit internal data frame is configured for one start bit,

eight data bits, one control bit, and one stop bit.

Earth-Referenced Logic

Block 9 on block diagram page 129; Schematic on page 139.

The earth referenced section provides all rear panel input/output

capability. Microprocessor U903 handles GPIB (IEEE-488) control

through bus interface chip U904 and bus receiver/driver chips U907 and

U908. The RS-232 interface is also controlled through U903. RS-232

transceiver chip U906 provides the required level shifting to approximate

– 9 volt logic levels through on-chip charge-pump power supplies using

capacitors C904 and C906. Communication between the earth referenced

logic interface circuits and the floating logic is accomplished through an

optically-isolated bi-directional serial interface. Isolator U101 couples

data from U903 to microprocessor U102. Isolator U901 couples data from

U102 to microprocessor U903.

Power Supplies

Block 10 on block diagram page 129; Schematic on page 140.

The power supply section, is divided into two isolated blocks similar to

the floating logic and earth referenced logic sections discussed earlier.

The floating supply outputs are – 18 Vdc, +5 Vdc, -5.2 Vdc (VEE), and a

6 Vrms center tapped filament supply for the vacuum fluorescent display.

All earth referenced logic is powered from a single +5 Vdc supply.

Power-on reset signals are provided by both the floating and earth

referenced power supplies. In addition, the floating section +5 Vdc supply

incorporates a power failure detection circuit which provides a priority

interrupt signal to the main CPU (U102).

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Chapter 5 Theory of Operation

Power Supplies

The ac mains are connected by a fused power entry module, P1.

This module incorporates the functions of mains connection, on/off

switching, fusing, and line voltage selection (100/120/220 (230)/240).

The line voltage selection function of module P1 selects which primary

winding of power transformer T1 is energized. The transformer

secondary windings are connected to the main pc board through

connector J1001.

The floating +5 Vdc and -5.2 Vdc supplies are produced by a bridge

rectifier formed by diodes CR1006 through CR1009, filter capacitors

C1005 and C1009, and voltage regulators U1003 and U1004. U1005 and

CR1011 form a clamp circuit to provide over voltage protection in the

event of a mains or transformer failure. The PFAIL and PONRST*

signals are derived from the floating +5 Vdc supply. PFAIL is asserted

when the raw 5 Vdc supply drops below 6.4 V signaling an unstable

power supply condition to the main CPU (U102). Current instrument

state information is copied to non-volatile RAM, U106 for future recall if

needed. The PONRST* signal holds the main CPU and other logic in a

reset state until after the +5 Vdc logic power supply is fully operational.

This signal is generally active only following application of line power to

the instrument.

The floating –18 volt supplies are produced by bridge rectifier CR1001,

filter capacitors C1001 and C1003, and regulators U1001 and U1002.

These supplies are used to power all analog circuits in the function generator.

In addition, the vacuum fluorescent display is driven from the – 18 volt

supplies. A separate winding of T1 provides a center tapped 6 Vrms

filament supply for the display. Bias circuit CR1010, R1009, and C1011

generate the required cathode dc bias for the display filament supply.

The 5 volt earth referenced supply is produced by rectifier CR1051,

C1053, and regulator U1051. This supply is earth referenced through

the screw used to mount the PC board to the instrument chassis.

The GPIB (IEEE-488) and RS-232 computer interfaces and the rear-

panel EXT Trigger circuits are powered from this supply. A controlled

power-on reset signal for processor U903 is generated by U1052.

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Chapter 5 Theory of Operation

Display and Keyboard

Block 11 on block diagram page 129; Schematic on page 141.

The front panel circuits consist of vacuum fluorescent display control,

display high voltage drivers, and keyboard scanning. Communication

between the front panel and floating logic circuits is accomplished

through a 4-wire bi-directional serial interface. The main CPU, U102,

can cause a hardware reset to processor U1101 by signal IGFPRES.

The front panel logic operates from -13 volts (logic 1) and -18 volts

(logic 0). The four serial communication signals are level shifted by

comparator U1301 from the floating logic 0 V to 5 V levels to the -18 V

to -13 V levels present on the front panel assembly. The front panel logic

high supply (-13 volts) is produced from the -18 volt supply by voltage

regulator U1102.

Display anode and grid voltages are +18 volts for an on segment and

-18 volts for an off segment. The -12 V cathode bias for the display is

provided by the main pc board’s filament winding center tap bias circuit

CR1010, R1009, and C1011 shown on the power supply schematic

(see page 140).

Keyboard scanning is accomplished through a conventional scanned

row-column key matrix. Keys are scanned by outputting data at

microprocessor U1101 port pins P0.0 through P0.4 to poll each key

column for a key press. Column read-back data are read by the

microprocessor at port pins P1.0 through P1.3 for decoding and

communication to the floating logic circuits. Rotary knob quadrature

inputs are read directly by the microprocessor port pins P1.6 and P1.7.

100

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Service

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Service

This chapter discusses the procedures involved for returning a failed

function generator to Agilent for service or repair. Subjects covered

include the following:

œ Operating Checklist . . . . . . . . . . . . . . . . . . . 103

œ Types of Service Available . . . . . . . . . . . . . . . 104

œ Repackaging for Shipment . . . . . . . . . . . . . . . 105

œ Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 105

œ Electrostatic Discharge (ESD) Precautions . . . . . . 106

œ Surface Mount Repair . . . . . . . . . . . . . . . . . . 106

œ To Replace the Power-Line Fuse . . . . . . . . . . . . 107

œ To Replace the Output Protection Fuse (F801) . . . . 107

œ Troubleshooting Hints . . . . . . . . . . . . . . . . . 108

œ Self-Test Procedures . . . . . . . . . . . . . . . . . . 110

102

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Chapter 6 Service

Operating Checklist

Before returning your function generator to Agilent for service or repair,

check the following items:

Is the function generator inoperative?

Verify that the ac power cord is connected to the function generator.

Verify that the front-panel Power switch is depressed.

Verify that the power-line fuse is good (see page 22).

The function generator is shipped from the factory with a

500 mAT fuse installed. This is the correct fuse for all line voltages.

Verify the power-line voltage setting.

See “To prepare the function generator for use” on page 21.

Does the function generator fail self-test?

Verify that the correct power-line voltage is selected.

See “To prepare the function generator for use” on page 21.

Is the function generator’s output inoperative?

Turn off the function generator and remove the power cord.

Using an ohmmeter, measure the resistance between the output

BNC center conductor and case. If the ohmmeter measures >100W,

the internal output protection fuse, F801, may be open.

103

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Chapter 6 Service

Types of Service Available

If your function generator fails during the warranty period (within three

years of original purchase), Agilent will replace or repair it free of charge.

After your warranty expires, Agilent will repair or replace it at a

competitive price. The standard repair process is “whole unit exchange”.

The replacement units are fully refurbished and are shipped with new

calibration certificates.

Standard Repair Service (worldwide)

Contact your nearest Agilent Technologies Service Center. They will

arrange to have your function generator repaired or replaced.

Agilent Express Unit Exchange (U.S.A. only)

You will receive a refurbished, calibrated replacement Agilent 33120A in

1 to 4 days.

Call 1-877-447-7278 and ask for “Agilent Express”.

œ You will be asked for your serial number, shipping address, and a credit

card number to guarantee the return of your failed unit.

œ If you do not return your failed unit within 15 business days, your credit

card will be billed for the cost of a new 33120A.

Agilent will immediately send a replacement 33120A directly to you.

œ The replacement unit will come with instructions for returning your

failed unit. Please retain the shipping carton and packing materials to

return the failed unit to Agilent. If you have questions regarding these

instructions, please call 1-877-447-7278.

œ The replacement unit will have a different serial number than your

failed unit. If you need to track your original serial number, a blank

label will be shipped with the replacement unit to record your original

serial number.

104

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Chapter 6 Service

Repackaging for Shipment

If the unit is to be shipped to Agilent for service or repair, be sure to:

œ Attach a tag to the unit identifying the owner and indicating the required

service or repair. Include the instrument model number and your full

serial number.

œ Place the unit in its original container with appropriate packaging

material.

œ Secure the container with strong tape or metal bands.

If the original shipping container is not available, place your unit in a

container which will ensure at least 4 inches of compressible packaging

material around all sides for the instrument. Use static-free packaging

materials to avoid additional damage to your unit.

Agilent suggests that you always insure shipments.

Cleaning

Clean the outside of the instrument with a soft, lint-free, slightly

dampened cloth. Do not use detergent. Disassembly is not required

or recommended for cleaning.

105

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Chapter 6 Service

Electrostatic Discharge (ESD) Precautions

Almost all electrical components can be damaged by electrostatic

discharge (ESD) during handling. Component damage can occur at

electrostatic discharge voltages as low as 50 volts.

The following guidelines will help prevent ESD damage when servicing

the function generator or any electronic device.

œ Disassemble instruments only in a static-free work area.

œ Use a conductive work area to dissipate static charge.

œ Use a conductive wrist strap to dissipate static charge accumulation.

œ Minimize handling.

œ Keep replacement parts in original static-free packaging.

œ Remove all plastic, styrofoam, vinyl, paper, and other static-generating

materials from the immediate work area.

œ Use only anti-static solder suckers.

SHOCK HAZARD. Only service-trained personnel who are aware

of the hazards involved should remove the instrument covers.

To avoid electrical shock and personal injury, make sure to

disconnect the power cord from the function generator before

removing the covers.

WARNING

Surface Mount Repair

Surface mount components should only be removed using soldering irons

or desoldering stations expressly designed for surface mount components.

Use of conventional solder removal equipment will almost always result in

permanent damage to the printed circuit board and will void your Agilent

factory warranty.

106

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Chapter 6 Service

To Replace the Power-Line Fuse

The power-line fuse is located within the function generator’s fuse-holder

assembly on the rear panel (see page 22). The function generator is shipped

from the factory with a 500 mAT slow-blow fuse installed (part number

2110-0458). This is the correct fuse for all line voltages.

To Replace the Output Protection Fuse (F801)

The Output Protection Fuse is located inside the function generator.

This fuse is a thru-hole soldered 500 mA part (part number 2110-0716).

The fuse is located near the output connector (J801) on the main PC board.

You will need to disassemble the function generator to replace this fuse

(use a TORX T-15 driver to remove the screws located on the rear panel).

The disassembly procedure is shown on page 130.

107

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Chapter 6 Service

Troubleshooting Hints

This section provides a brief checklist of common failures. Before trouble-

shooting or repairing the function generator, make sure the failure is in

the instrument rather than any external connections. Also make sure

that the instrument is accurately calibrated. The function generator’s

circuits allow troubleshooting and repair with basic equipment such as a

6 ‰ -digit multimeter and a 100 MHz oscilloscope.

Unit is Inoperative

Verify that the ac power cord is connected to the function generator.

Verify that the front-panel Power switch is depressed.

Verify that the power-line fuse is good (see page 22).

The function generator is shipped from the factory with a

500 mAT fuse installed. This is the correct fuse for all line voltages.

Verify the power-line voltage setting.

See “To prepare the function generator for use” on page 21.

Unit Reports Error 760

This error may be produced if you accidentally turn off power the unit

during a calibration or while changing a non-volatile state of the

instrument. Recalibration or resetting the state should clear the error.

If the error persists, a hardware failure may have occurred.

Unit Fails Self-Test

Verify that the correct power-line voltage setting is selected. Also, ensure

that all terminal connections (both front panel and rear terminals) are

removed while the self-test is performed. Failure of the System DAC U03

will cause many self-test failures.

108

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Chapter 6 Service

Troubleshooting Hints

Power Supply Problems

SHOCK HAZARD. Only service-trained personnel who are aware

of the hazards involved should remove the instrument covers.

The procedures in this section require that you connect the power

cord to the instrument with the covers removed. To avoid

electrical shock and personal injury, be careful not to touch the

power-line connections.

WARNING

Check that the input to the supply voltage regulator is at least

1 volt greater than its output.

Circuit failures can cause heavy supply loads which may pull

down the regulator output voltage.

Check the main supply voltages as tabulated below.

Power Supply

+5 Ground Ref.

+5 Floating

Minimum

4.75V

Maximum

5.25V

4.75V

5.25V

-5.2 Floating

+18 Floating

-18 Floating

-5.46V

17.0V

-4.94V

19.1V

-19.1V

4.75V

-17.0V

5.25V

+5REF Floating

Some circuits produce their own local power supplies derived from

the main supplies. Be sure to check that these local supplies are

active. In particular, the output amplifier and front panel sections

have local supplies. Always check that the power supplies are free

of ac oscillations using an oscilloscope.

109

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Chapter 6 Service

Self-Test Procedures

Power-On Self-Test

Each time the function generator is powered on, a small set of self-tests

are performed. These tests check that the minimum set of logic and

measurement hardware are functioning properly. The power-on self-test

performs checks 601, 625, and 626.

Complete Self-Test

Hold the shift key while turning on the power to perform a complete

self-test. The tests are performed in the order shown below.

Performing Individual Tests

You can perform individual self-tests through the SYStem menu and

TEST command. The parameters allowed are ALL, 603, 604, 605, 606,

607, and 608. All numbered tests are looped to give a continuous pass/fail

indication when started from the menu (they will repeat the waveform or

sync signal until interrupted).

601

Front panel does not respond The main CPU U102 attempts to

establish serial communications with the front panel processor U1101.

During this test, U1101 turns on all display segments. Communication

must function in both directions for this test to pass. If this error is

detected during power-up self-test, the function generator will beep twice.

This error is only readable from the remote interface.

602

603

RAM read/write failed This test writes and reads a 55 and AA

checker board pattern to each address of ram U103. Any incorrect

readback will cause a test failure.

Waveform RAM readback failed This test writes and reads a A55

and 5AA checker board pattern (12-bit) to each address of waveform

ram U404 and U405. The test writes and reads the pattern twice,

at alternating addresses. Any incorrect readback will cause a test failure.

604

Modulation RAM readback failed This test writes and reads a 5A

and A5 checker board pattern (8-bit) to each address of Modulation ram

U205. The test writes and reads the pattern twice, at alternating

addresses. Any incorrect readback will cause a test failure.

110

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Chapter 6 Service

Self-Test Procedures

605

606

Serial configuration readback failed This test re-sends the last 3

byte serial configuration data to all the serial path (SERDAT, SERBCK,

SERCLK). The data is then clocked back into U103 and compared against

the original 3 bytes sent. A failure occurs if the data do not match.

This tests checks the serial data path through U301, U302, and U305.

This tests does not check the serial path to the system DAC U303.

Waveform ASIC failed This test is the first part of test 607 (below).

This test sets up a burst modulation program of a special waveform

(a four period ramp wave) where the data at each waveform address is

the same as the last 12 bits of its address. The burst modulation

waveform is run for 1 cycle plus 1 address and the waveform data is read

back and compared. A correct result infers that the modulation program

ran correctly and halted at the correct address. This checks the ability of

U205 and U206 to correctly run a burst modulation program. This test

and test 604 give a high confidence in the modulation circuitry. This test

will fail if a trigger signal is present on the rear panel Ext Trig BNC input.

607

608

625

SYNC signal detection failure, Bessel filter path This test runs the

special waveform described in test 606 and counts transitions of the

SYNC line. The test should provide 8 transitions of the SYNC signal.

The test also checks the 7th Order Bessel filter path and U620 and U604.

An incorrect number of transitions will generate an error. This test will

fail if a trigger signal is present on the rear panel Ext Trig BNC input.

SYNC signal detection failure, Elliptical filter path This test runs

a special waveform and counts transitions of the SYNC line. The test

should provide 2 transitions of the SYNC line. The test checks the 9th

Order Elliptical filter path. An incorrect number of transitions will

generate an error. This test will fail if a trigger signal is present on the

rear panel Ext Trig BNC input.

I/O processor does not respond This test checks that communications

can be established between U102 and U903 through the optically isolated

(U101 and U901) serial data link. Failure to establish communication in

either direction will generate an error. If this condition is detected at

power-on self-test, the function generator will beep and the error

annunciator will be on.

626

701

I/O processor failed self-test This test causes the earth referenced

processor U903 to execute an internal, ram test. Failure will generate

an error.

Checks that the calibration security disable jumper is removed. If the jumper

is shorted at power on, all non-volatile RAM is reset to initial factory values.

111

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112

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Replaceable Parts

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Replaceable Parts

This chapter contains information to help you order replacement parts for

your 33120A Function Generator. The parts lists are divided into the

following groups:

œ 33120-66521 Main PC Assembly (A1)

œ 33120-66502 Front-Panel Display and Keyboard PC Assembly (A2)

œ 33120A Mainframe

œ Manufacturer’s List

Parts are listed in alphanumeric order according to their schematic

reference designators. The parts lists include a brief description of the

part with applicable Agilent part number and manufacturer part number.

To Order Replaceable Parts

You can order replaceable parts from Agilent using the Agilent part

number or directly from the manufacturer using the manufacturer’s part

number. Note that not all parts listed in this chapter are available as

field-replaceable parts. To order replaceable parts from Agilent, do the

following:

1 Contact your nearest Agilent Sales Office or Agilent Service Center.

2 Identify the parts by the Agilent part number shown in the replaceable

parts list. Note that not all parts are directly available from Agilent;

you may have to order certain parts from the specified manufacturer.

3 Provide the instrument model number and serial number.

114

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

C101-C102

C103-C105

C107

0160-6497

0160-5945

0160-6497

0160-5945

0160-6497

0160-5945

0160-6497

0160-5945

0160-6497

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

C108

C109-C110

C111-C113

C114-C117

C201-C202

C203

C204

C205

0160-5945

0160-6497

0160-5945

0160-6497

0160-5945

0160-6497

0160-5945

0160-6497

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

C206-C207

C208-C210

C211-C213

C301-C306

C308-C309

C310-C312

C313-C318

C319

C320

C401-C402

C404

C405

C406

C407

C408

C409

C410

C411

0160-6497

0160-5967

0160-5962

0160-5967

0160-5962

0160-5967

0160-6497

0160-5945

0160-6497

0160-5945

CAP-FXD 0.1 uF 25 V

CAP-FXD 100 pF 50 V

CAP-FXD 15 pF 50 V

CAP-FXD 100 pF 50 V

CAP-FXD 15 pF 50 V

CAP-FXD 100 pF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01 uF 50 V

04222 12065C104KAT A

04222 08051A101JAT A

04222 08051A150JAT A

04222 08051A101JAT A

04222 08051A150JAT A

04222 08051A101JAT A

04222 12065C104KAT A

04222 08055C103KAT A

04222 12065C104KAT A

04222 08055C103KAT A

C412

C413-C422

C423

C424

C425

C426-C427

C428

C429-C432

C503-C504

C505-C506

C507-C508

0160-6497

0160-5959

0160-5947

0160-6497

0160-6736

0160-5967

0160-6497

0160-7405

0160-5953

0160-5964

CAP-FXD 0.1 uF 25 V

CAP-FXD 33 pF 50 V

CAP-FXD 1000 pF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 0.01uF +-10% 50 V CER X7R

CAP-FXD 100 pF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 560 pF +-10% 50 V CER X7R

CAP-FXD 270 pF 50 V

CAP-FXD 180 pF 50 V

04222 12065C104KAT A

04222 08051A330JAT A

04222 08055C102KAT A

04222 12065C104KAT A

51406 GRM426X7R103K50

04222 08051A101JAT A

04222 12065C104KAT A

28480 0160-7405

02444 08051A271JAT A

04222 08051A181JATRA

C509-C510

C521-C522

C531-C532

C533-C534

0160-5958

0160-5954

0160-5955

0160-5976

CAP-FXD 39 pF 50 V

CAP 220 pF 5% 50V

CAP-FXD 68 pF 50 V

CAP-FXD 12 pF 50 V

04222 08051A390JAT A

04222 08051A221JAT A

04222 08051A680JATRA

04222 08051A120JAT A

115

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

C535-C536

C539-C540

C541-C542

C543-C544

C545-C546

C547-C548

C551-C552

C553-C554

C601-C607

C608

0160-5952

0160-7721

0160-5965

0160-5967

0160-7733

0160-5953

0160-5961

0160-5965

0160-6497

0160-5954

CAP-FXD 330 pF 50 V

04222 08055A331JAT A

04222 08055A820FATMA

04222 08051A151JAT A

04222 08051A101JAT A

04222 08055A101FAT_A

04222 08051A271JAT A

04222 08051A220JAT A

04222 08051A151JAT A

04222 12065C104KAT A

04222 08051A221JAT A

CAP-FXD 82 pF +-1% 50 V CER C0G

CAP-FXD 150pF +-5% 50 V CER C0G

CAP-FXD 100 pF 5%

CAP-FXD 100 pF +-1% 50 V CER C0G

CAP-FXD 270 pF 50 V

CAP-FXD 22 pF 50 V

CHIP CAPACITOR

CAP-FXD 0.1 uF 25 V

CAP 220 pF 5% 50V

C623

C624

C630

C631

C632-C633

C702

C703-C704

C705

C706-C707

C709

0180-3975

0160-5945

0160-5955

0160-5957

0160-5953

0160-5975

0160-5942

0180-3975

0160-5975

CAP-FXD 2.2 uF 20 V TA

CAP-FXD 0.01 uF 50 V

CAP-FXD 68 pF 50 V

CAP-FXD 47 pF

CAP-FXD 270 pF 50 V

CAP-FXD 10 pF 50 V

CAP-FXD 1 pF 50 V

CAP-FXD 2.2 uF 20 V TA

CAP-FXD 10 pF 50 V

04222 TAJB225M020

04222 08055C103KAT A

04222 08051A680JATRA

04222 08051A470JAT A

02444 08051A271JAT A

04222 08051A100JAT A

04222 08051A1R0CAT A

04222 TAJB225M020

04222 08051A100JAT A

C710

C711

C712

C713

C714-C719

C720

C802

C901

C902

0180-3975

0180-3859

0180-3975

0180-3859

0160-6497

0160-5942

0160-5964

0160-6497

0160-5955

0160-6497

CAP-FXD 2.2 uF 20 V TA

CAP-FXD 1000 uF+-20% 35 VDC

CAP-FXD 2.2 uF 20 V TA

CAP-FXD 1000 uF+-20% 35 VDC

CAP-FXD 0.1 uF 25 V

CAP-FXD 1 pF 50 V

CAP-FXD 180 pF 50 V

CAP-FXD 0.1 uF 25 V

04222 TAJB225M020

S4217 SME35VB102M12.5X25LL

04222 TAJB225M020

S4217 SME35VB102M12.5X25LL

04222 12065C104KAT A

04222 08051A1R0CAT A

04222 08051A181JATRA

04222 12065C104KAT A

04222 08051A680JATRA

04222 12065C104KAT A

CAP-FXD 68 pF 50 V

CAP-FXD 0.1 uF 25 V

C903-C906

C908

C909-C911

C913

C1001

C1002

C1003

C1004

C1005

C1006

0160-5945

0160-6497

0180-4313

0180-3751

0180-4313

0180-3751

0180-4086

0180-3751

0160-6497

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP 2200 uF 50V

CAP-FXD 1 uF 35 V TA

CAP-FXD 2200 uF 50V

CAP-FXD 1 uF 35 V TA

CAP-FXD .01 F+-20% 25 VDC AL

CAP-FXD 1 uF 35 V TA

CAP-FXD 0.1 uF 25 V

04222 08055C103KAT A

04222 12065C104KAT A

S4217 KME50VB222M18X35LL

04222 TAJB105M035

S4217 KME50VB222M18X35LL

04222 TAJB105M035

S4217 SME25VN103M22X45LL

04222 TAJB105M035

04222 12065C104KAT A

C1007-C1008

C1009

C1010-C1011

C1013

C1014

0180-4589

0180-4116

0160-6497

0180-4116

0160-6497

CAP-FXD +-20% 16 V AL-ELCTLT

CAP-FXD 22 uF 20 V TA

CAP-FXD 0.1 uF 25 V

CAP-FXD 22 uF 20 V TA

CAP-FXD 0.1 uF 25 V

S4217 SMH16VN153M22X35LL

04222 TAJD226M020

04222 12065C104KAT A

04222 TAJD226M020

C1015-1016

04222 12065C104KAT A

116

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

C1017-1019

C1020-1021

C1051-C1052

C1053

C1054

C1055

0160-5947

0160-5945

0160-6497

0180-4086

0180-4116

0160-6497

CAP-FXD 1000 pF 50 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD .01 F+-20% 25 VDC

CAP-FXD 22 uF 20 V TA

CAP-FXD 0.1 uF 25 V

04222 08055C102KAT A

04222 08055C103KAT A

04222 12065C104KAT A

S4217 SME25VN103M22X45LL

04222 TAJD226M020

04222 12065C104KAT A

CR301

CR302-CR303

CR401

1906-0291

1902-1541

1906-0291

1902-1512

1902-1610

1901-1386

1902-1807

1906-0291

DIODE- 70V 100MA

04713 MBAV99

DIODE-ZNR 3.3V 5% TO-236 (SOT-23)

DIODE- 70V 100MA

DIODE-ZNR 7.5V 5% PD=.155W TC=+5.3MV

DIODE-ZNR SMB 3.3V 5% 1W

DIODE SI PN SOT23 100V 750MA

DIODE-ZNR SMB 24V 42MA 1.0W 5%

DIODE- 70V 100MA

04713 BZX84C3V3

04713 MBAV99

04713 BZX84C7V5

04713 1SMB5913B

28480 1901-1386

04713 1SMB5934BT3

04713 MBAV99

CR601

CR701-CR702

CR703-CR704

CR709-CR710

CR801-CR802

CR803-CR804

CR901-CR904

CR1001

1906-0407

1906-0291

1902-1609

1901-1607

1902-1609

1906-0407

1901-1346

DIODE-FW BRDG 400V 1A

DIODE- 70V 100MA

DIODE-ZNR 6.2V 5% PD=1.5W IR=5UA

DIODE-PWR RECT SMC 400V 2.5A 2.5US S3G

DIODE-ZNR 6.2V 5% PD=1.5W IR=5UA

DIODE-FW BRDG 400V 1A

71744 DF04S

CR1002-1003

CR1004-1005

CR1006-1009

CR1010

CR1051

CR1052

04713 MBAV99

04713 1SMB5920B

71744 S3G

04713 1SMB5920B

71744 DF04S

DIODE,TVS,D0214AB,43V,1500WP,SMCJ43CA

71744 SMCJ43CA

E901

F801

9164-0173

2110-0716

9170-1421

1205-0880

1205-0213

BEEPER

51406 PKM24-4AO-1

75915 R251.500T1

28480 9170-1421

13103 7021B-TC10-MT

13103 2228B

FUSE-SUBMINIATURE .50A 125V NTD AX UL

BEAD, SHIELDING (CHOKE)

HEATSINK-TO-220

FB401-FB402

FB601

FB701-FB702

FB1001-1002

HS1001-1004

HSQ713

HEAT SINK SGL TO-5/TO-39-CS

HSQ718

13103 2228B

J101

J102

J301

J401

J601

J701

J801

J901

J902

J903

J1001

J1002

J1051

1252-4484

1252-4683

1250-1884

1250-0257

1251-2969

1251-5066

1251-2969

1252-2266

1252-2161

1250-1884

1252-5136

1251-5066

1252-4487

CONN-POST TYPE 2.0-PIN-SPCG 12-CONT

CONN-FRCC VERT MALE 10PIN SMC

CONNECTOR-RF BNC RCPT, 50-OHM

CONNECTOR-RF SMB PLUG 50-OHM

CONN PHONE VERT

27264 52007-1210

76381 N3662-6202

00779 227161-6

00779 413990-3

27264 15-24-0503

27264 22-04-1021

27264 15-24-0503

00779 748959-1

00779 554923-2

00779 227161-6

27264 26-64-4090

27264 22-04-1021

27264 26-64-4030

CONN DIS VERT MALE 2PIN FP

CONN PHONE VERT

CONN-RECT D-SUBMIN 9-CKT 9-CONT

CONN-RECT MICRORBN 24-CKT 24-CONT

CONN-RF BNC RCPT PC-W-STDFS 50-OHM

CONN-DIS FRIC LOCK VERT MALE 9PIN

CONN DIS VERT MALE 2 PIN FP

CONN-POST TYPE .156-PIN-SPCG 3-CONT

117

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

JM1001-1004

JM1051

0699-1503

RESISTOR .05 +-100% TKF

28480 0699-1503

K501-K502

K601-K602

K801-K804

0490-1664

RELAY 2C 5VDC-COIL 1A 110VDC

28480 0490-1664

L501-L502

L503-L504

L505-L506

L521-L522

L531-L532

L533-L534

L535-L536

L537-L538

L601-L602

L801

9140-1716

9140-1102

9140-1425

9140-1102

9140-1103

9140-1102

9140-1101

9140-1102

0699-1503

9140-1099

INDUCTOR 910 nH +2% -2%

INDUCTOR 560 nH +-5% 2.8W-MMX3.4LG-MM 24226 03273

INDUCTOR SMT 270 nH 5% 24226 SM3-270J

INDUCTOR 560 nH +-5% 2.8W-MMX3.4LG-MM 24226 03273

INDUCTOR 680 nH +-5% 2.8W-MMX3.4LG-MM 24226 03273

INDUCTOR 560 nH +-5% 2.8W-MMX3.4LG-MM 24226 03273

INDUCTOR 470 nH +-5% 2.8W-MMX3.4LG-MM 24226 03273

INDUCTOR 560 nH +-5% 2.8W-MMX3.4LG-MM 24226 03273

RESISTOR .05 +-100% TKF

INDUCTOR SMT 220 nH 5%

02113 1008CS-911XGBC

28480 0600-1503

09021 KL32TER22J

Q401

1854-1037

1853-0516

1853-0567

1854-1148

1853-0516

1854-1148

1853-0567

1853-0516

1854-1037

TRANSISTOR PD=350 MW FT=300 MHZ

TRANSISTOR PD=350 MW FT=600 MHZ

TRANSISTOR PD=350 MW FT=250 MHZ

TRANSISTOR PD=350 MW FT=650 MHZ

TRANSISTOR PD=350 MW FT=600 MHZ

TRANSISTOR PD=350 MW FT=650 MHZ

TRANSISTOR PD=350 MW FT=250 MHZ

TRANSISTOR PD=350 MW FT=600 MHZ

TRANSISTOR PD=350 MW FT=300 MHZ

04713 MMBT3904

04713 MMBTH81

04713 MMBT3906

04713 MMBTH10

04713 MMBTH81

04713 MMBTH10

04713 MMBT3906

04713 MMBTH81

04713 MMBT3904

Q601-Q602

Q603-Q604

Q605

Q701

Q702

Q704

Q705

Q707

Q708

Q709

Q710

Q711-Q712

Q713

Q714

Q715-Q717

Q718

1854-1445

5063-1420

1853-0728

1854-0597

1853-0728

1854-1303

1853-0293

TRANSISTOR NPN SI SC-59

TRANSISTOR PNP 600 MHZ

28480 1854-1445

28480 5063-1420

28480 1853-0728

04713 2N5943

28480 1853-0728

28480 1854-1303

04713 2N5583

TRANSISTOR PNP SI TO-261AA (SOT-223)

TRANSISTOR NPN 2N5943 SI TO-39 PD=1W

TRANSISTOR PNP SI TO-261AA (SOT-223)

TRANSISTOR NPN SI TO-261AA (SOT-223)

TRANSISTOR P RF TO39 30V 500 MA 1GHZ

R101-R104

R106-R109

R110

R111-R112

R114-R116

R117

R118-R119

R120-R121

R201

0699-1318

0699-1423

0699-1386

0699-1318

0699-1391

0699-1423

0699-1318

0699-1423

0699-1318

0699-1391

0699-3034

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 215 +-1% .125 W TKF TC=0+-100

RESISTOR 5.62K +-1% .125 W TKF TC=0+-100 28480 0699-1386

28480 0699-1318

28480 0699-1423

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 215 +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 215 +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .1W TKF TC=0+-100

28480 0699-1318

28480 0699-1391

28480 0699-1423

28480 0699-1318

28480 0699-1423

28480 0699-1318

28480 0699-1391

2M627 MCR10-FZHM-F-1001

R203

R205

118

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

R301

R302

R303-R304

R305

R307-R308

R309

R310

R311

R313-R314

0699-1403

0699-3211

0699-1318

0699-1391

0699-3431

0699-1937

0699-1384

0699-1344

0699-1434

RESISTOR 31.6K +-1% .125 W TKF TC=0+-100 28480 0699-1403

RESISTOR 39.2K 1% 1206 .125 W 200V TC=100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 4.99K +-1% .125 W TKF TC=0+-100

28480 0699-3211

28480 0699-1318

28480 0699-1391

28480 0699-3431

RESISTOR 1.24K 1% 1206 .125 W TC=100 200V 28480 0699-1937

RESISTOR 4.64K +-1% .125 W TKF TC=0+-100

RESISTOR 10 +-1% .125 W TKF TC=0+-100

RESISTOR 619 +-1% .125 W TKF TC=0+-100

28480 0699-1384

28480 0699-1344

28480 0699-1434

R316

R317

R318-R320

R321

R322

R323

R324

R401

R402

0699-1391

0699-1374

0699-3431

0699-1318

0699-3211

0699-1400

0699-1432

0699-1344

0699-3698

0699-3041

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 1.78K +-1% .125 W TKF TC=0+-100

RESISTOR 4.99K +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 39.2K 1% 1206 .125 W 200V TC=100

RESISTOR 26.1K +-1% .125 W TKF TC=0+-100

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 10 +-1% .125 W TKF TC=0+-100

RESISTOR 10 +-1% .1W TKF TC=0+-100

RESISTOR 3.48K +-1% .1W TKF TC=0+-100

28480 0699-1391

28480 0699-1374

28480 0699-3431

28480 0699-1318

28480 0699-3211

28480 0699-1400

28480 0699-1432

28480 0699-1344

2M627 MCR10-F-10R0

2M627 MCR10-F-3481

R404

R405-R406

R407-R408

R409

R410

R411

R412

R413

R414

R415

0699-2889

0699-2832

0699-1381

0699-2489

0699-1415

0699-2937

0699-2431

0699-1318

0699-1391

0699-3594

RESISTOR 4.7 +-5% .125 W TKF

RESISTOR 200 +-0.1% .125 W TF TC=0+-25

RESISTOR 3.48K +-1% .125W TKF TC=0+-100 2M627 MCR18-F-3481

RESISTOR 10K +-0.1% .125 W TF TC=0+-25

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 16K +-0.1% .125W TF TC=0+-25

RESISTOR 3.32K +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 20.5K +-0.1% .125W TF TC=0+-25

2M627 MCR18J4R

11502 W1206R032000BT

11502 W1206R031002BT

28480 0699-1415

09021 RN73E2BTE1602B

28480 0699-2431

28480 0699-1318

28480 0699-1391

11502 W1206R03-2052B

R418

R420

R421

R422

R423

0699-2103

0699-3431

0699-1423

0699-1431

0699-1318

0699-3763

0699-2488

0699-1433

0699-1345

0699-1826

RESISTOR 49.9 +-1% .125 W TKF TC=0+-100

RESISTOR 4.99K +-1% .125 W TKF TC=0+-100

RESISTOR 215 +-1% .125 W TKF TC=0+-100

RESISTOR 464 +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 69 .1% 1206 .125 W 100V TC=25

RESISTOR 100 +-0.1% .125 W TF TC=0+-25

RESISTOR 562 +-1% .125 W TKF TC=0+-100

RESISTOR 11 +-1% .125 W TKF TC=0+-100

RESISTOR 45.3 +-1% .125 W TKF TC=0+-100

28480 0699-2103

28480 0699-3431

28480 0699-1423

28480 0699-1431

28480 0699-1318

11502 W1206-R03-69R0-B

11502 W1206R031000BT

28480 0699-1433

28480 0699-1345

28480 0699-1826

R424

R501-R502

R521-R522

R601

R602-R609

R610

R611-R614

R615

R616-R622

R623

R624-R625

R626

R627-R628

0699-1415

0699-1433

0699-1345

0699-1826

0699-1415

0699-2712

0699-1415

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 562 +-1% .125 W TKF TC=0+-100

RESISTOR 11 +-1% .125 W TKF TC=0+-100

RESISTOR 45.3 +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 255 +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-100

28480 0699-1415

28480 0699-1433

28480 0699-1345

28480 0699-1826

28480 0699-1415

28480 0699-2712

28480 0699-1415

119

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

R629

R630

R631

R632-R633

R634

0699-2712

0699-1415

0699-1432

0699-1384

0699-1415

0699-1432

0699-1384

0699-1344

0699-1432

0699-2631

RESISTOR 255 +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-10

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 4.64K +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-10

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 4.64K +-1% .125 W TKF TC=0+-100

RESISTOR 10 +-1% .125 W TKF TC=0+-100

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 2K +-1% .125 W TKF TC=0+-100

28480 0699-2712

28480 0699-1415

28480 0699-1432

28480 0699-1384

28480 0699-1415

28480 0699-1432

28480 0699-1384

28480 0699-1344

28480 0699-1432

28480 0699-2631

R635

R636-R637

R638-R639

R640

R641

R642

R643

R644

R645

R646

R647-R648

R649

R650

R651

0699-1432

0699-2196

0699-1415

0699-1432

0699-1352

0699-1332

0699-1392

0699-1330

0699-1392

0699-1318

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 78.7 1% 1206 .125 W 200 V TC=100 28480 0699-2196

28480 0699-1432

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 21.5 +-1% .125 W TKF TC=0+-100

RESISTOR 196K +-1% .125 W TKF TC=0+-100 28480 0699-1332

RESISTOR 11K +-1% .125W TKF TC=0+-100 28480 0699-1392

RESISTOR 100K +-1% .125 W TKF TC=0+-100 28480 0699-1330

28480 0699-1415

28480 0699-1432

28480 0699-1352

RESISTOR 11K +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

28480 0699-1392

28480 0699-1318

R652

R653

R654

R655

R656

R657

R658

R659

R660

R661

R662

0699-2103

0699-1432

0699-2631

0699-1415

0699-1366

0699-1360

0699-1432

0699-1318

0699-1398

0699-1330

RESISTOR 49.9 +-1% .125 W TKF TC=0+-100

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 2K +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 82.5 +-1% .125 W TKF TC=0+-100

RESISTOR 46.4 +-1% .125 W TKF TC=0+-100

RESISTOR 511 +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

28480 0699-2103

28480 0699-1432

28480 0699-2631

28480 0699-1415

28480 0699-1366

28480 0699-1360

28480 0699-1432

28480 0699-1318

RESISTOR 21.5K +-1% .125 W TKF TC=0+-100 28480 0699-1398

RESISTOR 100K +-1% .125 W TKF TC=0+-100 28480 0699-1330

R663

R664

0699-1421

0699-2883

0699-2843

0699-2489

0699-2631

0699-1422

2100-4199

0699-2883

0699-1394

0699-1366

RESISTOR 178 +-1% .125 W TKF TC=0+-100

RESISTOR 1.4K 1% 1206 .125 W 200V TC=100 28480 0699-2883

28480 0699-1421

R701-R702

R703-R704

R705-R706

R707-R708

R710

R711

R712

R713

RESISTOR 100K +-0.1% .125 W TF TC=0+-25

RESISTOR 10K +-0.1% .125 W TF TC=0+-25

RESISTOR 2K +-1% .125 W TKF TC=0+-100

RESISTOR 196 +-1% .125 W TKF TC=0+-100

RESISTOR-TRMR 100 20% TKF TOP-ADJ 1-TRN 32997 3314G-1-101E

RESISTOR 1.4K 1% 1206 .125 W 200V TC=100 28480 0699-2883

RESISTOR 14.7K +-1% .125 W TKF TC=0+-100 28480 0699-1394

11502 W1206R031003BT

11502 W1206R031002BT

28480 0699-2631

28480 0699-1422

RESISTOR 82.5 +-1% .125 W TKF TC=0+-100

28480 0699-1366

R715-R716

R717

R718

R719-R720

R722

R723

0699-1415

0699-2883

0699-1351

0699-1415

0699-1366

0699-1351

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 1.4K 1% 1206 .125 W 200V TC=100 28480 0699-2883

RESISTOR 19.6 +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 82.5 +-1% .125 W TKF TC=0+-100

RESISTOR 19.6 +-1% .125 W TKF TC=0+-100

28480 0699-1415

28480 0699-1351

28480 0699-1415

28480 0699-1366

28480 0699-1351

120

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

R724

R725

0699-1437

0699-1415

0699-2064

0699-1415

0699-1827

0699-2890

0699-1378

0699-1387

0699-1426

RESISTOR 825 +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-1% .125 W TKF TC=0+-100

RESISTOR 6.8 +-5% .125 W TKF TC=0+-500

RESISTOR 100 +-1% .125 W TKF TC=0+-100

28480 0699-1437

28480 0699-1415

2M627 MCR18J

28480 0699-1415

R726-R727

R728

R729-R730

R731-R732

R734-R735

R738

RESISTOR 130 1% 1206PKG TC=100 200V 1/8W 28480 0699-1827

RESISTOR 3.3 5% 1206 .125 W 200V TC=500

RESISTOR 2.61K +-1% .125 W TKF TC=0+-100

RESISTOR 6.81K +-1% .125 W TKF TC=0+-100

RESISTOR 287 +-1% .125 W TKF TC=0+-100

2M627 MCR18EZHJ3R3E

28480 0699-1378

28480 0699-1387

28480 0699-1426

R739

R740

R741

0699-1437

0699-2488

0699-1437

0699-1387

0699-2488

0699-3019

0699-3022

RESISTOR 825 +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-0.1% .125 W TF TC=0+-25

RESISTOR 825 +-1% .125 W TKF TC=0+-100

RESISTOR 6.81K +-1% .125 W TKF TC=0+-100

RESISTOR 100 +-0.1% .125 W TF TC=0+-25

RESISTOR 26.1 1% SM0805 .1 W TC=250 100V 28480 0699-3019

28480 0699-1437

11502 W1206R031000BT

28480 0699-1437

28480 0699-1387

11502 W1206R031000BT

R744-R747

R748-R749

R750-R751

R752-R755

R756

R758

R760-R764

R766-R772

R774-R775

RESISTOR 46.4 +-1% .1 W TKF TC=0+-200

28480 0699-3022

R801

0699-3769

0699-1423

0699-3770

0699-3765

0699-3762

0699-3766

0699-3763

0699-3767

0699-3763

0699-1423

RESISTOR 11.8 +-1% .125 W TKF TC=0+-100

RESISTOR 215 +-1% .125 W TKF TC=0+-100

RESISTOR 23.7 +-0.1% .125 W TF TC=0+-25

RESISTOR 115 .1% 1206 .125 W 100V TC=25

RESISTOR 53 .1% 1206 .125 W 100V TC=25

RESISTOR 232 .1% 1206 .125 W 100V TC=25

RESISTOR 69 .1% 1206 .125 W 100V TC=25

RESISTOR 309 .1% 1206 .125 W 100V TC=25

RESISTOR 69 .1% 1206 .125 W 100V TC=25

RESISTOR 215 +-1% .125 W TKF TC=0+-100

28480 0699-3769

28480 0699-1423

R802-R803

R804-R806

R807-R808

R809

R810-R811

R812-R813

R814

11502 W1206-R03-23R7-B

11502 W1206-R03-1150-B

11502 W1206-R03-53R0-B

11502 W1206-R03-2320-B

11502 W1206-R03-69R0-B

11502 W1206-R03-3090-B

11502 W1206-R03-69R0-B

28480 0699-1423

R815

R816-R817

R818

R819

R820

R821

R822-R823

R824-R825

R826-R827

R828-R829

R830-R832

R833

0699-2852

0699-3770

0699-2852

0699-3769

0699-3764

0699-3765

0699-3763

0699-3769

0699-3762

0699-3767

RESISTOR 442 +-1% .125 W TKF TC=0+-100

RESISTOR 23.7 +-0.1% .125 W TF TC=0+-25

RESISTOR 442 +-1% .125 W TKF TC=0+-100

RESISTOR 11.8 +-1% .125 W TKF TC=0+-100

28480 0699-2852

11502 W1206-R03-23R7-B

28480 0699-2852

28480 0699-3769

RESISTOR 442 0.1% 1206 .125W 100V TC=25 11502 W1206-R03-4420-B

RESISTOR 115 .1% 1206 .125W 100V TC=25

RESISTOR 69 .1% 1206 .125 W 100V TC=25

RESISTOR 11.8 +-1% .125 W TKF TC=0+-100

RESISTOR 53 .1% 1206 .125 W 100V TC=25

RESISTOR 309 .1% 1206 .125 W 100V TC=25

11502 W1206-R03-1150-B

11502 W1206-R03-69R0-B

28480 0699-3769

11502 W1206-R03-53R0-B

11502 W1206-R03-3090-B

R834-R836

R837

R901

R902

R904-R905

R906

0699-3763

0699-1383

0699-1318

0699-1330

0699-1318

0699-1374

0699-1398

RESISTOR 69 .1% 1206 .125 W 100V TC=25

RESISTOR 4.22K +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-1% .125 W TKF TC=0+-100

11502 W1206-R03-69R0-B

28480 0699-1383

28480 0699-1318

RESISTOR 100K +-1% .125 W TKF TC=0+-100 28480 0699-1330

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 1.78K +-1% .125 W TKF TC=0+-100

RESISTOR 21.5K +-1% .125 W TKF TC=0+-100

28480 0699-1318

28480 0699-1374

28480 0699-1398

R907

121

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

R908

R909

R910

R1001

R1002

R1003

R1004

R1008-R1009

R1010

R1011

0699-1318

0699-3408

0699-1391

0699-1380

0699-1424

0699-1380

0699-1424

0699-1391

0699-1421

0699-1433

RESISTOR 1K +-1% .125 W TKF TC=0+-100

RESISTOR 1K +-5% 1 W TKF TC=0+-200

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 3.16K +-1% .125 W TKF TC=0+-100 28480 0699-1380

RESISTOR 237 +-1% .125 W TKF TC=0+-100 28480 0699-1424

RESISTOR 3.16K +-1% .125 W TKF TC=0+-100 28480 0699-1380

RESISTOR 237 +-1% .125 W TKF TC=0+-100

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 178 +-1% .125 W TKF TC=0+-100

RESISTOR 562 +-1% .125W TKF TC=0+-100

28480 0699-1318

2M627 MCR1001KJ

28480 0699-1391

28480 0699-1424

28480 0699-1391

28480 0699-1421

28480 0699-1433

R1012

R1013

R1014

R1052

0699-1391

0699-1380

0699-1384

0699-1327

RESISTOR 10K +-1% .125 W TKF TC=0+-100

RESISTOR 3.16K +-1% .125 W TKF TC=0+-100 28480 0699-1380

RESISTOR 4.64K +-1% .125 W TKF TC=0+-100 28480 0699-1384

28480 0699-1391

RESISTOR 1M +-1% .125 W TKF TC=0+-100

28480 0699-1327

RP301-RP302

RP401

RP403-RP404

RP601

1810-1360

1810-1065

1810-1331

1810-1159

RESISTOR-NETWORK 16PINS,THICK FILM,SMD 28480 1810-1360

NET-RES 15 1.0K OHM 16-PIN

NET-RES 8 220.0 OHM 16-PIN

RESISTOR-NETWORK

11236 767161102G

11236 767163221G

28480 1810-1159

SHD902

SPR1-SPR2

SPR10-SPR20

33120-00614

0380-0643

2190-0577

RFI SHIELD

STANDOFF-HEX .255-IN-LG 6-32-THD

WASHER- NO. 10 .194-IN-ID .294-IN-OD

28480 33120-00614

28480 0380-0643

20859 03118

U101

U102

U103

U104

U105

U106

U107

U108

U109

U201

U202

1990-1552

1821-1479

1820-8907

33120-88861

1818-4777

1818-5699

1820-5808

1820-5941

1820-5944

1820-6306

1820-5808

OPTO-ISOLATOR LED-IC GATE IF=10 MA-MAX

IC-BIT SLICE MPU/MCU

IC GATE-ARY CMOS

PROG PAL

IC 256K-BIT SRAM 70-NS CMOS

28480 HCPL-2211-300

34649 N80C196KB

27014 SCX6206AK0

28480 33120-88861

28480 1818-4777

IC, CMOS, AMB, 32 PIN, 120 NANOSECONDS 34335 AM29F010-120JC

IC FF CMOS/74HC D-TYPE POS-EDGE

IC DCDR CMOS/74ACT BIN 8-TO-1-LINE

74ACT32-GATE, QUAD 2-INPUT OR

IC TRANSCEIVER CMOS/HCT BUS OCTL

IC FF CMOS/74HC D-TYPE POS-EDGE

04713 MC74HC273DW

28480 1820-5941

28480 1820-5944

27014 MM74HCT245WM

04713 MC74HC273DW

U203-U204

U205

U206

U210

U211

U212

U213

U214

U215

U216

U217

U218

1820-6306

1818-5093

1821-0976

1820-7244

1820-5940

1820-5944

1990-1552

1820-8830

1820-5937

1820-4998

1820-5943

1821-0559

IC TRANSCEIVER CMOS/HCT BUS OCTL

IC 256K-BIT SRAM 25-NS CMOS

IC MODULATOR ANLG 68 PIN PLCC

IC SCHMITT-TRIG CMOS/74AC INV HEX

IC GATE CMOS/74ACT AND QUAD 2-INP

74ACT32-GATE, QUAD 2-INPUT OR

OPTO-ISOLATOR LED-IC GATE IF=10MA-MAX

IC MUXR/DATA-SEL CMOS/ACT 8-TO-1-LINE

IC FF CMOS/74AC D-TYPE POS-EDGE-TRIG

IC GATE TTL/F OR QUAD 2-INP

27014 MM74HCT245WM

04713 MCM6206DJ25

01295 F107563FN

27014 74AC14SC

28480 1820-5940

07263 02237

28480 HCPL-2211-300

04713 MC74ACT251D

07263 02237

27014 74F32SC

IC MUXR/DATA-SEL CMOS/74ACT 2-TO-1-LINE 07263 02237

IC FF BICMOS/ABT D-TYPE POS-EDGE-TRIG 01295 SN74ABT16374ADL

122

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Chapter 7 Replaceable Parts

33120-66521 – Main PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

U301-U302

U303

U304

U305

U306-U307

U314

U315

U401

U402-U403

U404-U405

1821-0964

1826-2793

1821-0434

1820-5790

1826-1622

1820-5943

1820-6524

1820-8461

1818-4983

IC DRVR 8X S 20SOL 45V 250MA

IC DA VOUT SER 16SOL 16BIT AD1851R

IC ANLG-MUXR/DEMUXR CMOS/HC 8-CHAN

01295 TPIC6595DW

24355 AD1851R

18324 74HC4051D

IC SHF-RGTR CMOS/74HC SYNCHRO SERIAL-IN 18324 74HC4094D

IC OP AMP LOW-BIAS-H-IMPD QUAD 14 PIN

IC MUXR/DATA-SEL CMOS/74ACT 2-TO-1-LINE

IC XLTR ECL/10KH TTL-TO-ECL QUAD

IC FF BICMOS/ABT D-TYPE POS-EDGE-TRIG 01295 SN74ABT574ADW

IC 256K-BIT SRAM 15-NS CMOS

04713 TL074CD

07263 02237

04713 MC10H124FN

28480 1818-4983

U407

U409

U410

U411

U412

U413

U601-U602

U603

U604

1826-3517

1826-1619

1826-1622

1820-4377

1820-5732

1813-0861

1821-0434

1826-2797

1820-8830

1826-1950

D/A 12-BIT 28-PLCC MISC

D/A 8-BIT 20-PLCC CMOS

IC OP AMP LOW-BIAS-H-IMPD QUAD 14 PIN

IC GATE TTL/F NAND QUAD 2-INP

IC LCH CMOS/74HC D-TYPE OCTL

CLOCK-OSCILLATOR-XTAL 40.000-MHZ 0.01% 28480 1813-0861

IC ANLG-MUXR/DEMUXR CMOS/HC 8-CHAN

IC MULTIPLIER HS 14 PIN DIP-P

IC MUXR/DATA-SEL CMOS/ACT 8-TO-1-LINE

IC COMPARATOR HS SGL 8 PIN PLSTC-SOIC 28480 1826-1950

28480 1826-3517

24355 AD7528JP

04713 TL074CD

27014 74F00SC

04713 MC74HC573ADW

18324 74HC4051D

24355 AD734AN

04713 MC74ACT251D

U620

U621

U702

U901

U902

U903

U904

U906

U907

U908

U1001

1821-0622

1826-1991

1990-1552

1820-7244

34401-88842

1821-1721

1820-7662

1820-6176

1820-6175

1826-0527

IC DRVR BICMOS/ABT LINE OCTL

18324 74ABT540D

24355 AD711JR

IC OP AMP HS SINGLE 8 PIN PLSTC-SOIC

OPTO-ISOLATOR LED-IC GATE IF=10MA-MAX

IC SCHMITT-TRIG CMOS/74AC INV HEX

IC, ROM PROGRAMMED

28480 HCPL-2211-300

27014 74AC14SC

28480 34401-88842

01295 MP9914FNL

28480 1820-7662

01295 SN75ALS160DW

01295 SN75ALS162DW

27014 LM337T

IC GPIB CONTROLLER

IC-INTERFACE DRVR/RCVR BIPOLAR DUAL

IC-INTERFACE XCVR BIPOLAR BUS OCTL

IC V RGLTR-ADJ-NEG 1.2/37V 3-TO-220 PKG

U1002

U1003

U1004

U1006

U1007

U1051

U1052

1826-0393

1826-0527

1826-1597

1826-2264

1826-2801

1826-2794

1826-2264

IC V RGLTR-ADJ-POS 1.2/37V 3-TO-220 PKG

IC V RGLTR-ADJ-NEG 1.2/37V 3-TO-220 PKG

IC V RGLTR-FXD-POS 4.85/5.15V TO-220 PKG

IC PWR MGT-UND-V-SEN 8 PINS P-SOIC PKG

IC V RGLTR-OV-V-SEN 8-P-SOIC PKG

27014 LM317

27014 LM337T

27014 LM2940CT

04713 MC34064D-5

04713 MC3423D

27014 LM2490CT-5.0-LB01

04713 MC34064D-5

IC V RGLTR-FXD-POS 4.85/5.15V 3-TO-220

IC PWR MGT-UND-V-SEN 8 PINS P-SOIC PKG

XJ601

XJ801

3050-0447

WASHER-FL NM NO. 8 .192-IN-ID .37-IN-OD

28480 3050-0447

XQ713

XQ718

1200-0181

INSULATOR-XSTR NYLON

13103 7717-5-N

Y101

Y901

0410-4009

CERO-RES 12 MHZ +1-0.8%

28480 0410-4009

123

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Chapter 7 Replaceable Parts

33120-66502 – Display and Keyboard PC Assembly

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

C1101

C1102-1103

C1104

0160-5945

0180-3751

0160-6497

0160-5947

0160-6497

0160-5947

0160-5945

0160-6497

CAP-FXD 0.01 uF 50 V

CAP-FXD 1 uF 35 V TA

CAP-FXD 0.1 uF 25 V

CAP-FXD 1000 pF 50 V

CAP-FXD 0.1 uF 25 V

CAP-FXD 1000 pF 50 V

CAP-FXD 0.01 uF 50 V

CAP-FXD 0.1 uF 25 V A

04222 08055C103KAT A

S0545 NRS105M35R8

04222 12065C104KAT A

04222 08055C102KAT A

04222 12065C104KAT A

04222 08055C102KAT A

04222 08055C103KAT A

04222 12065C104KAT A

C1105

C1201-1203

C1301-1302

C1303-1304

C1305-1310

CR1101

CR1102

CR1105

J1301

L1301

M1301

1906-0291

1906-0395

1902-1542

34401-61602

9170-1431

33120-00611

DIODE- 70 V 100 MA

04713 MBAV99

25403 BAS28

04713 BZX84C6V2

28480 34401-61602

28480 9170-1431

28480 33120-00611

DIO SIG 2X SOT143L 75V 215MA 2PF

DIODE-ZNR 6.2V 5% TO-236 (SOT-23)

DISPLAY CABLE ASSY, 8.8L

SHIELDING CORE, BEADS

SHIELD-ESD

R1101

R1102

R1103-1106

R1107

R1108

R1109

R1301-1304

R1305-1306

R1307-1308

R1309

0699-1399

0699-1391

0699-1344

0699-1391

0699-1378

0699-1435

0699-1423

0699-1391

0699-1330

0699-1399

RESISTOR 23.7K +-1% .125W TKF TC=0+-100

RESISTOR 10K +-1% .125W TKF TC=0+-100

RESISTOR 10 +-1% .125 W TKF TC=0+-100

RESISTOR 10K +-1% .125W TKF TC=0+-100

RESISTOR 2.61K +-1% .125W TKF TC=0+-100

RESISTOR 681 +-1% .125W TKF TC=0+-100

RESISTOR 215 +-1% .125W TKF TC=0+-100

RESISTOR 10K +-1% .125W TKF TC=0+-100

RESISTOR 100K +-1% .125W TKF TC=0+-100

2M627 MCR18FX

28480 0699-1344

2M627 MCR18FX

RESISTOR 23.7K +-1% .125W TKF TC=0+-100 2M627 MCR18FX

S1119

U1101

U1102

U1103

U1201

U1202

U1203

U1204

U1301

U1302

Y1101

0960-0892

33120-88813

1826-1402

1826-2264

1820-5562

1820-4966

1820-5330

33120-89301

1826-1528

1820-6756

0410-4009

ROTARY ENCODER

87C51 PROG

28480 0960-0892

28480 33120-88813

04713 MC78L05ACD

04713 MC34064D-5

01295 SN74HC02D

01295 SN74HC74D

01295 SN75518FN

28480 33120-89301

IC-V RGLTR-FXD-POS 4.8/5.2V 8-P-SOIC PKG

IC-PWR MGT-UND-V-SEN 8 PINS P-SOIC PKG

74HC02-GATE, QUAD 2-INPUT NOR INPUT

IC-FF CMOS/74HC D-TYPE POS-EDGE-TRIG

IC-INTERFACE DRIVER BIPOLAR DISPLAY

VACUUM FLUORESCENT DISPLAY

IC-COMPARATOR LP QUAD 14 PIN PLSTC-SOIC 27014 LM339M

IC-SHIFT-REGISTER CMOS/74HC BIDIR

CERO-RES 12 MHZ +1-0.8%

04713 MC74HC299D

28480 0410-4009

124

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Chapter 7 Replaceable Parts

33120A Mainframe

Reference

Designator

Agilent Part

Number

Mfr.

Code

Mfr. Part

Number

Qty

Part Description

33120-66521

33120-66502

3160-0847

33120-61601

RS232-61601

33250-13603

33120-84131

2110-0458

MAIN PC ASSEMBLY

DISPLAY AND KEYBOARD PC ASSEMBLY

FAN-TBAX 12V 5.3-CFM NOM

CABLE BNC

RS-232 CABLE

AGILENT INTUILINK ARB SOFTWARE CD

COVER

28480 33120-66521

28480 33120-66502

11855 DFB0412L-SG

28480 33120-61601

28480 RS232-61601

28480 33250-13603

28480 33120-84131

75915 239.500

CBL1-CBL2

CBL4

CD1

CVR1

FUSE-500 MAT

CHASSIS

FRM1

33120-80111

28480 33120-80111

HDW1

HDW2

HDW3

HDW4

KIT1

KYC1

KYC2

KYC3

0380-1820

0535-0154

3050-1547

34401-88304

34401-86010

33120-87411

34401-43711

34401-45011

SPACER, .438 IN LG, .280 IN OD

NUT-HEX SGL-CHAM M9.0 X 0.75 2MM-THK

WASHER-FL MTLC 9.0 9.2-MM-ID 14-MM-OD AL 11239 4-9-01

REAR PANEL

BUMPERS (FRNT/REAR) & POWER MOD CVR

FRONT-PANEL KNOB

PUSH-ROD, POWER-ON

28480 0380-1820

11239 3-9-03

28480 34401-88304

28480 34401-86010

28480 33120-87411

28480 34401-43711

28480 33120-45011

CARRYING HANDLE

MP2

PNL1

PS1

SCR1-SCR7

SCR8-SCR9

33120-81911

33120-40211

33120-86201

0515-0433

0624-0862

9100-5090

FRONT-PANEL KEYPAD

28480 33120-81911

28480 33120-40211

28480 33120-86201

28480 0515-0433

FRONT-PANEL/BEZEL ASSEMBLY

POWER-MODULE/FUSE & FUSE DRWR

SCREW-M4 X 8MM LG PAN-HD

SCREW-TPG .750-IN-LG PAN-HD-PHL STL,1022 93907 225-44395-890

TRANSFORMER-PWR 100/120/220/240V

FRONT DISPLAY WINDOW

08807 8470B45

28480 33120-49321

WD1

33120-49321

125

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Chapter 7 Replaceable Parts

Manufacturer’s List

Mfr Code

Manufacturer’s Name

Manufacturer’s Address

Zip Code

00779

01295

02113

04222

04713

05971

07263

07933

08807

09021

11236

11239

11502

11855

13103

18324

20859

24355

24444

24226

25403

27014

27264

28480

32997

34335

34649

51406

71744

75915

76381

93907

2L446

2M627

S0545

S4217

Amp Inc

Texas Instruments Inc

Coilcraft Inc

AVX Corp

Motorola Inc

Harrisburg, PA, U.S.A.

Dallas, TX, U.S.A.

Cary, IL, U.S.A.

Great Neck, NY, U.S.A.

Roselle, IL, U.S.A.

Burbank, CA, U.S.A.

Cupertino, CA, U.S.A.

Mountain View, CA, U.S.A.

Grayslake, IL, U.S.A.

Bradford, PA, U.S.A.

Elkhart, IN, U.S.A.

Alburquerque, NM, U.S.A.

Corpus Christi, TX, U.S.A.

Taipei, Taiwan

17111

75265

60013

11021

60195

91505

95014

94040

60030

16701

46514

87109

78411

LYN-TRON Inc

Fairchild Semiconductor Corp

Raytheon Co Semiconductor Div Hq

MidwestCo Enterprises Inc

KOA Speer Electronics Inc

CTS Corp

Nobel Mercantile Co

IRC Inc

Delta Electronic Industries Co

Thermalloy Inc

Dallas, TX, U.S.A.

75234

94086

53212

02062

85281

14070

02876

95052

60532

94303

92507

94086

95054

30067

07012

60016

55144

61101

94063

Signetics Corp

Mellowes Co

Sunnyvale, CA, U.S.A.

Milwaukee, WI, U.S.A.

Norwood, MA, U.S.A.

Tempe, AZ, U.S.A.

Gowanda, NY, U.S.A.

Eindhoven, Netherlands

Santa Clara, CA, U.S.A.

Lisle, IL, U.S.A.

Palo Alto, CA, U.S.A.

Riverside, CA, U.S.A.

Sunnyvale, CA, U.S.A.

Santa Clara, CA, U.S.A.

Marietta, GA, U.S.A.

Clifton, NJ, U.S.A.

Des Plaines, IL, U.S.A.

St. Paul, MN, U.S.A

Rockford, IL, U.S.A.

Redwood City, CA, U.S.A.

Kyoto 615, JAPAN

Analog Devices Inc

General Semiconductor Ind Inc

Gowanda Electronics Corp

NV Philips Elcoma

National Semiconductor Corp

Molex Inc

Agilent Technologies, Inc.

Bourns Networks Inc

Advanced Micro Devices Inc

Intel Corp

Murata Corporation Of America

General Instrument Corp

Littelfuse Inc

3M Corp

Camcar Screw and Mfg Co

ADAC Screw Machine Products

Rohm Corp

NEC Electronics Inc

Nippon Chemi-Con Corp

Mountain View, CA, U.S.A.

Ohme-shi Tokyo, JAPAN

94043

126

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Schematics

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Schematics

œ 33120A Block Diagram . . . . . . . . . . . . . . . . . 129

œ Mechanical Disasembly . . . . . . . . . . . . . . . . . 130

œ Floating Logic Schematic . . . . . . . . . . . . . . . . 131

œ Digital Waveform Data Synthesis Schematic . . . . . 132

œ System DAC Schematic . . . . . . . . . . . . . . . . . 133

œ Waveform DAC Schematic . . . . . . . . . . . . . . . 134

œ Filters Schematic . . . . . . . . . . . . . . . . . . . . 135

œ Sync, Square Wave, and Attenuator Schematic . . . . 136

œ Output Amplifier Schematic . . . . . . . . . . . . . . 137

œ Output Attenuator Schematic . . . . . . . . . . . . . 138

œ Earth Reference Logic Schematic . . . . . . . . . . . . 139

œ Power Supplies Schematic . . . . . . . . . . . . . . . 140

œ Display and Keyboard Schematic . . . . . . . . . . . . 141

œ 33120-66521 Component Locator Diagram . . . . . . 142

œ 33120-66502 Component Locator Diagram . . . . . . 143

You may notice parts labeled as “No Load” on several schematics.

These are parts that were included in the original design but were

removed later to enhance performance or reduce cost.

128

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Block Diagram

129

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Loosen

Captive

Screws

Pull Off Handle

Slide Off Outer Case

Pull Off Bumpers

Remove Bottom Screw

Pull To

Remove

Pry Outward

From This Side

Press Down To

Unlatch Cable

Pull Up To

Disconnect

Remove Screw

Front Panel

Will Pull Off

Mechanical Disassembly

130

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33120-66521 (sheet 1 of 10)

Floating Logic Schematic

131

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33120-66521 (sheet 2 of 10)

Digital Waveform Data Synthesis Schematic

132

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33120-66521 (sheet 3 of 10)

System DAC Schematic

133

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33120-66521 (sheet 4 of 10)

Waveform DAC Schematic

134

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33120-66521 (sheet 5 of 10)

Filters Schematic

135

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33120-66521 (sheet 6 of 10)

Sync, Square Wave, and Attenuator Schematic

136

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33120-66521 (sheet 7 of 10)

Output Amplifier Schematic

137

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33120-66521 (sheet 8 of 10)

Output Attenuator Schematic

138

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33120-66521 (sheet 9 of 10)

Earth Reference Logic Schematic

139

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33120-66521 (sheet 10 of 10)

Power Supplies Schematic

140

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33120-66502 (sheet 1 of 1)

Display and Keyboard Schematic

141

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TOP SIDE 33120-66521 REV A

33120-66521 Component Locator Diagram

142

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TOP SIDE 33120-66502 REV C

33120-66502 Component Locator Diagram

143

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 Copyright Agilent Technologies, Inc.

Warranty

Safety Notices

1994-2002

The material contained in this

document is provided “as is,” and

is subject to being changed, with-

out notice, in future editions.

Further, to the maximum extent

permitted by applicable law,

Agilent disclaims all warranties,

either express or implied with

regard to this manual and any

information contained herein,

including but not limited to the

implied warranties of merchant-

ability and fitness for a particular

purpose. Agilent shall not be

liable for errors or for incidental

or consequential damages in

connection with the furnishing,

use, or performance of this docu-

ment or any information contain-

ed herein. Should Agilent and the

user have a separate written

agreement with warranty terms

covering the material in this docu-

ment that conflict with these

terms, the warranty terms in the

separate agreement will control.

Do not install substitute parts or

perform any unauthorized modifica-

tion to the product. Return the

product to an Agilent Technologies

Sales and Service Office for service

and repair to ensure that safety

features are maintained.

No part of this manual may be repro-

duced in any form or by any means

(including electronic storage and

retrieval or translation into a foreign

language) without prior agreement

and written consent from Agilent

Technologies as governed by the

United States and international

W A R N I N G

A WARNING notice denotes a hazard.

It calls attention to an operating proce-

dure, practice, or the like that, if not

correctly performed or adhered to,

could result in personal injury or death.

Do not proceed beyond a WARNING

notice until the indicated conditions

are fully understood and met.

Manual Part Number

33120-90017, March 2002

(order as 33120-90104 manual set)

Edition

Edition 6, March 2002

Edition 5, August 1997

Edition 4, February 1996

Edition 3, May 1994

Edition 2, March 1994

Edition 1, January 1994

C A U T I O N

A CAUTION notice denotes a hazard.

It calls attention to an operating proce-

dure, practice, or the like that, if not

correctly performed or adhered to,

could result in damage to the product

or loss of important data. Do not

proceed beyond a CAUTION notice

until the indicated conditions are

fully understood and met.

Printed in Malaysia

Agilent Technologies, Inc.

815 14th Street S.W.

Loveland, Colorado 80537 U.S.A.

Technologies Licenses

The hardware and/or software

described in this document are

furnished under a license and may

be used or copied only in accordance

with the terms of such license.

Assistance

Product maintenance agreements and

other customer assistance agreements

are available for Agilent Technologies

products. For assistance, contact your

nearest Agilent Technologies Sales

and Service Office. Further information

is available on the Agilent web site at

www.agilent.com/find/assist.

Restricted Rights Legend

Earth ground symbol.

If software is for use in the perform-

ance of a U.S. Government prime

contract or subcontract, Software is

delivered and licensed as “Commercial

computer software” as defined in

DFAR 252.227-7014 (June 1995),

or as a “commercial item” as defined

in FAR 2.101(a) or as “Restricted

computer software” as defined in

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Microsoft^®and Windows^®are U.S.

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W A R N I N G

Only qualified, service-trained person-

nel who are aware of the hazards

involved should remove the cover from

the instrument.

commercial license terms, and non-

DOD Departments and Agencies of

the U.S. Government will receive no

greater than Restricted Rights as

defined in FAR 52.227-19(c)(1-2)

(June 1987). U.S. Government users

will receive no greater than Limited

Rights as defined in FAR 52.227-14

(June 1987) or DFAR 252.227-7015

(b)(2) (November 1995), as applicable

in any technical data.

Certification

W A R N I N G

Agilent Technologies certifies that

this product met its published specifi-

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the factory. Agilent Technologies

further certifies that its calibration

measurements are traceable to the

United States National Institute of

Standards and Technology, to the

extent allowed by that organization’s

calibration facility, and to the calibra-

tion facilities of other International

Standards Organization members.

For continued protection against fire,

replace the line fuse only with a fuse

of the specified type and rating.

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