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Agilent Technologies
33120A manual TOP Side 33120-66521 REV a
Models:
33120A
1
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Troubleshooting
Specification
Modulation Characteristics
Error codes
Schematics
Dimension
Power Supply Problems
Setup
Main PC Assembly
Calibration Procedures
Page 144
Image 144
TOP SIDE
33120-66521
REV A
33120-66521
Component Locator Diagram
142
Page 143
Page 145
Page 144
Image 144
Page 143
Page 145
Contents
Service Guide
Agilent 33120A MHz Function Arbitrary Waveform Generator
Page
Convenient bench-top features
Flexible system features
Front Panel at a Glance
Front-Panel Number Entry
Front-Panel Menu at a Glance
MODulation Menu
Display Annunciators
Trig
Rear Panel at a Glance
Use the front-panel Input / Output Menu to
This Book
Page
Contents
Contents
Service
Schematics
Replaceable Parts
Contents
Specifications
Waveforms
Modulation Characteristics
General Specifications
Product Dimensions
Page
Quick Start
Quick Start
One User’s Guide 〈 This Service Guide
Connect the power cord and turn on the function generator
To prepare the function generator for use
Check the list of supplied items
Verify that there is ac power to the function generator
Verify the power-line voltage setting
Verify that the power-line fuse is good
If the function generator does not turn on
Remove the power cord . Remove
To adjust the carrying handle
To cancel the number mode, press Shift Cancel
To set the output frequency
Enter the magnitude of the desired frequency
Set the units to the desired value
To set the output amplitude
Enter the magnitude of the desired amplitude
How to change the offset to -1.5 mVdc
Enable the offset modify mode
To set a dc offset voltage
Enter the magnitude of the desired offset
To set the duty cycle
Select the square wave function
Enter the desired duty cycle
Output the waveform with the displayed duty cycle
To output a stored arbitrary waveform
Display the list of arbitrary waveforms
Move across to the Exprise choice
Select and output the displayed arbitrary waveform
To output a dc voltage
Enter the magnitude of the desired voltage
Set up the function generator to the desired configuration
Turn on the state storage mode
To store the instrument state
Save the instrument state
Restore the instrument state
Recall the stored instrument state
To rack mount the function generator
Quick Start
Front-Panel Menu Operation
Front-Panel Menu Operation
Front-panel menu reference
MODulation Menu
Front-panel menu reference SYStem Menu
Front-panel menu tutorial
Messages Displayed During Menu Use
Move across to the Power on command on this level
Turn on the menu
Move across to the SYS Menu choice on this level
Cycle the power to restore the default values
Move down a level to the Parameter choices
Save the change and turn off the menu
Select amplitude adjustment
Increment the first digit until 300.0 mVPP is displayed
Move down a level to the OUT Term command
To select the output termination
Move down a level and then across to the High Z choice
To output a modulated waveform
Select AM
Use the menu to select the shape of the modulating waveform
Move down a level verify that Sine is selected
Set the modulating frequency to 200 Hz
Set the modulation depth to 80%
Move down a level to the Secured command
To unsecure the function generator for calibration
Move across to the CAL Menu choice on this level
Move down to the parameters level
Calibration Procedures
Calibration Procedures
Agilent Calibration Services
Calibration Interval
Time Required for Calibration
Automating Calibration Procedures
Recommended Test Equipment
Test Considerations
Performance Verification Tests
Self-Test
Quick Performance Check
Frequency Verification
Function Gain and Linearity Verification
DC Function Offset Verification
AC Amplitude Verification
AC Amplitude Verification
Vrms 0.00035 Vrms
Amplitude Flatness Verification
15.00 MHz
AM Modulation Depth Verification
Vrms 0.0061 Vrms
Optional Performance Verification Tests
Square Wave Duty Cycle Verification
Distortion Verification
Calibration Security Code
Characters
To Unsecure the Function Generator Without the Security Code
Calibration Count
Calibration Message
General Calibration/Adjustment Procedure
Move down a level to the Unsecured command
Begin the Frequency and Burst Rate adjustment procedure
Move across to the Calibrate choice
Perform the next adjustment procedure
Calculate and save the new value
Frequency and Burst Rate Adjustment
Aborting a Calibration in Progress
Function Gain and Linearity Adjustment
AC Amplitude Adjustment High-Z
AC Amplitude Adjustment High-Z
Modulation Adjustment
Frequency Amplitude
AC Amplitude Adjustment 50W
AC Amplitude Adjustment 50W
Adjustment for KHz
DC Output Adjustment
Setup
Duty Cycle Adjustment
AC Amplitude Flatness Adjustment
AC Amplitude Flatness Adjustment
Exiting
Output Amplifier Adjustment Optional
Error Messages
System Error Messages
Self-Test Error Messages
Calibration Error Messages
Theory of Operation
Self-test procedures are described in chapter
Theory of Operation
Block Diagram Overview
This discussion pertains to the block diagram shown on
Block 8 on block diagram page 129 Schematic on
Output Attenuator
Block 7 on block diagram page 129 Schematic on
Output Amplifier
740 R710 R717 740 R710 R711 R715 R716 R719 R720
AM Modulation
Block 6 on block diagram page 129 Schematic on
Block 6 on block diagram page 129, schematic on
Pre-attenuator
Square Wave and Sync
Square Wave and Sync
Block 5 on block diagram page 129 Schematic on
Filters
Block 4 on block diagram page 129 Schematic on
Waveform DAC/Amplitude Leveling/Waveform RAM
Waveform DAC/Amplitude Leveling/Waveform RAM
Block 2 on block diagram page 129 Schematic on
Direct Digital Synthesis DDS Asic
Block 3 on block diagram page 129 Schematic on
System DACs
Block 1 on block diagram page 129 Schematic on
Floating Logic
Power Supplies
Block 9 on block diagram page 129 Schematic on
Block 10 on block diagram page 129 Schematic on
Earth-Referenced Logic
Power Supplies
Block 11 on block diagram page 129 Schematic on
Display and Keyboard
See
Service
Service
Operating Checklist
Is the function generator inoperative?
See To prepare the function generator for use on
Does the function generator fail self-test?
Types of Service Available
Call 1-877-447-7278 and ask for Agilent Express
Cleaning
Repackaging for Shipment
Agilent suggests that you always insure shipments
Electrostatic Discharge ESD Precautions
Surface Mount Repair
To Replace the Power-Line Fuse
To Replace the Output Protection Fuse F801
Troubleshooting Hints
Unit Reports Error
Unit is Inoperative
Unit Fails Self-Test
Power Supply Problems
Self-Test Procedures
Power-On Self-Test
625
112
Replaceable Parts
Replaceable Parts
Main PC Assembly
116
117
118
119
120
121
122
123
Display and Keyboard PC Assembly
33120A Mainframe
Manufacturer’s List
Schematics8
Schematics
Block Diagram
Pull Off Handle Loosen Captive
Sheet 1
132
Sheet 3
Sheet 4 Waveform DAC Schematic 134
Sheet 5
136
Sheet 7
Sheet 8 Output Attenuator Schematic 138
Sheet 9 of 10 Earth Reference Logic Schematic
Sheet 10 Power Supplies Schematic 140
Sheet 1 of 1 Display and Keyboard Schematic
TOP Side 33120-66521 REV a
TOP Side 33120-66502 REV C
Manual Part Number