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Agilent Technologies 33120A manual Theory of Operation

Models: 33120A

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Theory of Operation

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Agilent Technologies 33120A manual Theory of Operation

Contents

Agilent 33120A MHz Function Arbitrary Waveform Generator Service GuidePage Flexible system features Convenient bench-top featuresFront Panel at a Glance Front-Panel Number Entry MODulation Menu Front-Panel Menu at a GlanceTrig Display AnnunciatorsUse the front-panel Input / Output Menu to Rear Panel at a GlanceThis Book Page Contents Contents Schematics ServiceReplaceable Parts Contents Specifications Waveforms Modulation Characteristics General Specifications Product Dimensions Page Quick Start Quick Start Connect the power cord and turn on the function generator One User’s Guide 〈 This Service GuideTo prepare the function generator for use Check the list of supplied itemsVerify the power-line voltage setting Verify that there is ac power to the function generatorVerify that the power-line fuse is good If the function generator does not turn onRemove the power cord . Remove To adjust the carrying handle To set the output frequency To cancel the number mode, press Shift CancelEnter the magnitude of the desired frequency Set the units to the desired valueEnter the magnitude of the desired amplitude To set the output amplitudeEnable the offset modify mode How to change the offset to -1.5 mVdcTo set a dc offset voltage Enter the magnitude of the desired offsetSelect the square wave function To set the duty cycleEnter the desired duty cycle Output the waveform with the displayed duty cycleDisplay the list of arbitrary waveforms To output a stored arbitrary waveformMove across to the Exprise choice Select and output the displayed arbitrary waveformEnter the magnitude of the desired voltage To output a dc voltageTurn on the state storage mode Set up the function generator to the desired configurationTo store the instrument state Save the instrument stateRecall the stored instrument state Restore the instrument stateTo rack mount the function generator Quick Start Front-Panel Menu Operation Front-Panel Menu Operation MODulation Menu Front-panel menu referenceFront-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 Increment the first digit until 300.0 mVPP is displayed Select amplitude adjustmentTo 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 Recommended Test Equipment Automating Calibration ProceduresTest Considerations Self-Test Performance Verification TestsQuick Performance Check Function Gain and Linearity Verification Frequency VerificationAC Amplitude Verification DC Function Offset VerificationAC Amplitude Verification Vrms 0.00035 Vrms 15.00 MHz Amplitude Flatness VerificationVrms 0.0061 Vrms AM Modulation Depth VerificationSquare Wave Duty Cycle Verification Optional Performance Verification TestsDistortion Verification Characters Calibration Security CodeTo Unsecure the Function Generator Without the Security Code Calibration Message Calibration CountMove down a level to the Unsecured command General Calibration/Adjustment ProcedureBegin the Frequency and Burst Rate adjustment procedure Move across to the Calibrate choiceCalculate and save the new value Perform the next adjustment procedureAborting a Calibration in Progress Frequency and Burst Rate AdjustmentAC Amplitude Adjustment High-Z Function Gain and Linearity AdjustmentAC Amplitude Adjustment High-Z Frequency Amplitude Modulation AdjustmentAC Amplitude Adjustment 50W AC Amplitude Adjustment 50W Adjustment for KHz Setup DC Output AdjustmentAC Amplitude Flatness Adjustment Duty Cycle AdjustmentAC Amplitude Flatness Adjustment Exiting Output Amplifier Adjustment Optional System Error Messages Error MessagesSelf-Test Error Messages Calibration Error Messages Theory of Operation Theory of Operation Self-test procedures are described in chapterThis discussion pertains to the block diagram shown on Block Diagram OverviewOutput Attenuator Block 8 on block diagram page 129 Schematic onOutput Amplifier Block 7 on block diagram page 129 Schematic on740 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 SyncSquare Wave and Sync Filters Block 5 on block diagram page 129 Schematic onWaveform DAC/Amplitude Leveling/Waveform RAM Block 4 on block diagram page 129 Schematic onWaveform DAC/Amplitude Leveling/Waveform RAM Direct Digital Synthesis DDS Asic Block 2 on block diagram page 129 Schematic onSystem DACs Block 3 on block diagram page 129 Schematic onFloating Logic Block 1 on block diagram page 129 Schematic onBlock 9 on block diagram page 129 Schematic on Power SuppliesBlock 10 on block diagram page 129 Schematic on Earth-Referenced LogicPower Supplies Display and Keyboard Block 11 on block diagram page 129 Schematic onSee Service Service Is the function generator inoperative? Operating ChecklistSee To prepare the function generator for use on Does the function generator fail self-test?Call 1-877-447-7278 and ask for Agilent Express Types of Service AvailableRepackaging for Shipment CleaningAgilent suggests that you always insure shipments Surface Mount Repair Electrostatic Discharge ESD PrecautionsTo Replace the Output Protection Fuse F801 To Replace the Power-Line FuseUnit Reports Error Troubleshooting HintsUnit is Inoperative Unit Fails Self-TestPower Supply Problems Power-On Self-Test Self-Test Procedures625 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