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Agilent Technologies
33120A
manual
Sheet 1 of 1 Display and Keyboard Schematic
Models:
33120A
1
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Troubleshooting
Specifications
Modulation Characteristics
Error codes
Schematics
Dimension
Power Supply Problems
Setup
Main PC Assembly
Calibration Procedures
Page 143
Image 143
33120-66502
(sheet 1 of 1) Display and Keyboard Schematic 141
Page 142
Page 144
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Contents
Agilent 33120A MHz Function Arbitrary Waveform Generator
Service Guide
Page
Flexible system features
Convenient bench-top features
Front Panel at a Glance
Front-Panel Number Entry
MODulation Menu
Front-Panel Menu at a Glance
Trig
Display Annunciators
Use the front-panel Input / Output Menu to
Rear Panel at a Glance
This Book
Page
Contents
Contents
Replaceable Parts
Service
Schematics
Contents
Specifications
Waveforms
Modulation Characteristics
General Specifications
Product Dimensions
Page
Quick Start
Quick Start
Check the list of supplied items
One User’s Guide 〈 This Service Guide
Connect the power cord and turn on the function generator
To prepare the function generator for use
If the function generator does not turn on
Verify that there is ac power to the function generator
Verify the power-line voltage setting
Verify that the power-line fuse is good
Remove the power cord . Remove
To adjust the carrying handle
Set the units to the desired value
To cancel the number mode, press Shift Cancel
To set the output frequency
Enter the magnitude of the desired frequency
Enter the magnitude of the desired amplitude
To set the output amplitude
Enter the magnitude of the desired offset
How to change the offset to -1.5 mVdc
Enable the offset modify mode
To set a dc offset voltage
Output the waveform with the displayed duty cycle
To set the duty cycle
Select the square wave function
Enter the desired duty cycle
Select and output the displayed arbitrary waveform
To output a stored arbitrary waveform
Display the list of arbitrary waveforms
Move across to the Exprise choice
Enter the magnitude of the desired voltage
To output a dc voltage
Save the instrument state
Set up the function generator to the desired configuration
Turn on the state storage mode
To store the instrument state
Recall the stored instrument state
Restore the instrument state
To rack mount the function generator
Quick Start
Front-Panel Menu Operation
Front-Panel Menu Operation
MODulation Menu
Front-panel menu reference
Front-panel menu reference SYStem Menu
Front-panel menu tutorial
Messages Displayed During Menu Use
Move across to the SYS Menu choice on this level
Move across to the Power on command on this level
Turn on the menu
Save the change and turn off the menu
Cycle the power to restore the default values
Move down a level to the Parameter choices
Increment the first digit until 300.0 mVPP is displayed
Select amplitude adjustment
Move down a level and then across to the High Z choice
Move down a level to the OUT Term command
To select the output termination
Use the menu to select the shape of the modulating waveform
To output a modulated waveform
Select AM
Set the modulation depth to 80%
Move down a level verify that Sine is selected
Set the modulating frequency to 200 Hz
Move across to the CAL Menu choice on this level
Move down a level to the Secured command
To unsecure the function generator for calibration
Move down to the parameters level
Calibration Procedures
Calibration Procedures
Time Required for Calibration
Agilent Calibration Services
Calibration Interval
Recommended Test Equipment
Automating Calibration Procedures
Test Considerations
Self-Test
Performance Verification Tests
Quick Performance Check
Function Gain and Linearity Verification
Frequency Verification
AC Amplitude Verification
DC Function Offset Verification
AC Amplitude Verification
Vrms 0.00035 Vrms
15.00 MHz
Amplitude Flatness Verification
Vrms 0.0061 Vrms
AM Modulation Depth Verification
Square Wave Duty Cycle Verification
Optional Performance Verification Tests
Distortion Verification
Characters
Calibration Security Code
To Unsecure the Function Generator Without the Security Code
Calibration Message
Calibration Count
Move across to the Calibrate choice
General Calibration/Adjustment Procedure
Move down a level to the Unsecured command
Begin the Frequency and Burst Rate adjustment procedure
Calculate and save the new value
Perform the next adjustment procedure
Aborting a Calibration in Progress
Frequency and Burst Rate Adjustment
AC Amplitude Adjustment High-Z
Function Gain and Linearity Adjustment
AC Amplitude Adjustment High-Z
Frequency Amplitude
Modulation Adjustment
AC Amplitude Adjustment 50W
AC Amplitude Adjustment 50W
Adjustment for KHz
Setup
DC Output Adjustment
AC Amplitude Flatness Adjustment
Duty Cycle Adjustment
AC Amplitude Flatness Adjustment
Exiting
Output Amplifier Adjustment Optional
Self-Test Error Messages
Error Messages
System Error Messages
Calibration Error Messages
Theory of Operation
Theory of Operation
Self-test procedures are described in chapter
This discussion pertains to the block diagram shown on
Block Diagram Overview
Output Attenuator
Block 8 on block diagram page 129 Schematic on
Output Amplifier
Block 7 on block diagram page 129 Schematic on
740 R710 R717 740 R710 R711 R715 R716 R719 R720
AM Modulation
Square Wave and Sync
Block 6 on block diagram page 129 Schematic on
Block 6 on block diagram page 129, schematic on
Pre-attenuator
Square Wave and Sync
Filters
Block 5 on block diagram page 129 Schematic on
Waveform DAC/Amplitude Leveling/Waveform RAM
Block 4 on block diagram page 129 Schematic on
Waveform DAC/Amplitude Leveling/Waveform RAM
Direct Digital Synthesis DDS Asic
Block 2 on block diagram page 129 Schematic on
System DACs
Block 3 on block diagram page 129 Schematic on
Floating Logic
Block 1 on block diagram page 129 Schematic on
Earth-Referenced Logic
Power Supplies
Block 9 on block diagram page 129 Schematic on
Block 10 on block diagram page 129 Schematic on
Power Supplies
See
Block 11 on block diagram page 129 Schematic on
Display and Keyboard
Service
Service
Does the function generator fail self-test?
Operating Checklist
Is the function generator inoperative?
See To prepare the function generator for use on
Call 1-877-447-7278 and ask for Agilent Express
Types of Service Available
Agilent suggests that you always insure shipments
Cleaning
Repackaging for Shipment
Surface Mount Repair
Electrostatic Discharge ESD Precautions
To Replace the Output Protection Fuse F801
To Replace the Power-Line Fuse
Unit Fails Self-Test
Troubleshooting Hints
Unit Reports Error
Unit is Inoperative
Power Supply Problems
Power-On Self-Test
Self-Test Procedures
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
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