Self-Test Procedures | Agilent Technologies 33120A specification

Chapter 6 Service

Self-Test Procedures

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).

601Front 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.

602RAM read/write failed This test writes and reads a 55H and AAH checker board pattern to each address of ram U103. Any incorrect readback will cause a test failure.

603Waveform RAM readback failed This test writes and reads a A55H and 5AAH 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.

604Modulation RAM readback failed This test writes and reads a 5AH and A5H 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.

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Agilent Technologies 33120A manual Self-Test Procedures, Power-On Self-Test

Contents

Service Guide Agilent 33120A MHz Function Arbitrary Waveform GeneratorPage 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 Schematics ServiceReplaceable 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 generatorTo 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 settingVerify 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 frequencyEnter 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 modeTo set a dc offset voltage Enter the magnitude of the desired offset To set the duty cycle Select the square wave functionEnter the desired duty cycle Output the waveform with the displayed duty cycle To output a stored arbitrary waveform Display the list of arbitrary waveformsMove 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 modeTo 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 Turn on the menu Move across to the Power on command on this levelMove across to the SYS Menu choice on this level Move down a level to the Parameter choices Cycle the power to restore the default valuesSave the change and turn off the menu Select amplitude adjustment Increment the first digit until 300.0 mVPP is displayed To select the output termination Move down a level to the OUT Term commandMove down a level and then across to the High Z choice Select AM To output a modulated waveformUse the menu to select the shape of the modulating waveform Set the modulating frequency to 200 Hz Move down a level verify that Sine is selectedSet the modulation depth to 80% To unsecure the function generator for calibration Move down a level to the Secured commandMove across to the CAL Menu choice on this level Move down to the parameters level Calibration Procedures Calibration Procedures Calibration Interval Agilent Calibration ServicesTime 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 commandBegin 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 System Error Messages Error MessagesSelf-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 onPre-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 onBlock 10 on block diagram page 129 Schematic on Earth-Referenced Logic Power Supplies Display and Keyboard Block 11 on block diagram page 129 Schematic onSee 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 Repackaging for Shipment CleaningAgilent 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 ErrorUnit 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