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Agilent Technologies 856290216 Procedure I. Spectrum Analyzer Cover, Removal/Replacement

Models: 856290216

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Procedure I. Spectrum Analyzer Cover

Removal/Replacement

1.Disconnect the line-power cord, remove any adapters from the front panel connectors, and place the spectrum analyzer on its front panel.

2.If an HP 85620A Mass Memory Module or HP 85629B Test and Adjustment Module is mounted on the rear panel, remove it. Loosen (but do not remove) the four rear-bumper screws, using a 4 mm hex wrench. Pull the cover assembly off towards the rear of the instrument.

Caution	When replacing the spectrum analyzer cover, use caution to avoid damaging
	any cables.

3.When installing the cover assembly, be sure to locate the cover air vent holes on the bottom side of the spectrum analyzer. Attach with the four screws loosened in step 2, and tighten the four screws gradually to ensure that the cover is seated in the front frame gasket groove.

4.Torque each screw to 40 to 50 inch-pounds to ensure proper gasket compression to minimize EMI.

A

A l 5		SK122

Figure 4-1. Hinged Assemblies

4-4 Assembly Replacement

Image 129

Agilent Technologies 856290216 service manual Procedure I. Spectrum Analyzer Cover, Removal/Replacement

Contents

About this Manual HP Part No -90218 Supersedes Fia HewlettPage Warranty CertificationRegulatory Information Assistance Safety NotesPrevent electrical shock, do not remove covers General Safety ConsiderationsHow to Use This Guide Documentation OutlineThis guide uses the following conventions Contents Contents-2 Contents-3 Contents-4 Contents-5 Contents-6 Contents-7 Controller Section Contents-9 Contents-10 Figures Contents-12 Contents-13 Contents-14 Tables Contents-15PLL Serial Numbers and Repair Information Serial Number Label ExampleGeneral Information l-1 Table l- 1. Instrument Variations Instrument VariationsGeneral Information A21 OcxoGeneral Information l-3 HP 85629B Test and Adjustment ModuleService Kit Table l-2. Service Kit ContentsElectrostatic Discharge General Information l-5 Reducing Potential for ESD DamageStatic-Safe Accessories Returning Instruments for ServiceService Tag Static-Safe AccessoriesOther Packaging 9211-6969 Outer Carton 9220-5073 Pads 9220-5072 Top Tray General Information l-9 Recommended Test EquipmentInstrument Sources Table l-4. Recommended Test EquipmentGeneral Information l-l Recommended Test EquipmentInstrument Critical Specifications Recommended Use Instrument Accessories PAV PAM Sales and Service Offices US Field Operations Hewlett-Packard Sales and Service OfficesIntroduction Adjustment ProceduresWhich Adjustments Should Be Performed? Safety ConsiderationsAdjustable and Factory-Selected Components Test EquipmentAdjustment Tools Instrument Service Position8710-0033 A5 if Related AdjustmentsA10 Rythm Adjustable Components FM Span HV ADJSmpl Match VCO RangeFactory Selected Components Adjustment Indicator Using the TAMYTO TAM AdjustmentsRequired Test Equipment for TAM Adjustment Procedures 2-lFront End Cal adjustment Assembly Adjusted High Voltage Power Supply AdjustmentHigh Voltage Power Supply Adjustment Related Performance TestEquipment ProcedureDisplay Adjustment Display AdjustmentPreliminary Adjustments Cutoff AdjustmentDeflection Adjustments CRT Adjust Pattern Adjustment Procedures Intensity Adjustments A2 Display Adjustment Locations Fast Zero Span AdjustmentsPress SAVEI, Save State ,and State If Bandpass Adjustment If Bandpass AdjustmentTAM Connector Pin Locations LC Bandpass AdjustmentsFactory-Selected LC Filter Capacitors Xtal Bandpass AdjustmentsXtal Factory-Selected Capacitor Selection Factory-Selected Xtal Filter CapacitorsA5T200 Xtal CTR A5T202 Xtal CTRIf Bandpass Adjustment 10. Capacitor Part Numbers Related Performance Tests If Amplitude AdjustmentsIf Amplitude Adjustment Locations If Amplitude AdjustmentsA5 Reference Attenuator Adjustment A5 Adjustment Verification DC Log Adjustment Setup Adjustment Procedures DC Log Amplifier AdjustmentsDC Log Amplifier Adjustments A4 Limiter Phase AdjustmentLog Amplifier Adjustments A4 Linear Fidelity AdjustmentPress -,a, if AlI on OFF OFF, AD3 Curr if State A4 LOG Fidelity Adjustment11. Sampler Adjustment Setup Sampling Oscillator AdjustmentSampling Oscillator Adjustment Sampler Match AdjustmentSampling Oscillator Adjustment Sampling Oscillator Adjustment 1. Sampling Adjustments YTO Adjustment YTO Adjustment07SAVE Save STATE, State RECALL, Recall STATE, State YTO Main Coil Adjustments14. YTO Adjustment Locations YTO FM Coil Adjustments15. First LO Distribution Amplifier Adjustment Setup LO Distribution Amplifier Adjustment18. TAM Connector Pin Locations LO Distribution Amplifier AdjustmentDAC value for 4.60 GHz = Frequency Response Adjustment Automated Procedure AvailableFrequency Response Adjustment 17. Frequency Response Adjustment Setup MHz RF gain DAC value Frequency‘Response Adjustment Calibrator Amplitude Adjustment Calibrator Amplitude AdjustmentMHz Reference Adjustment-OCXO Non-Option 19 MHz Reference Adjustment Setup and Adjustment Location MHz Reference Adjustment-OCXO Non-OptionOFF MHz Reference Adjustment-TCXO Option MHz Reference Adjustment-TCXO OptionProcedure Demodulator Adjustment Demodulator AdjustmentSPAN, Zero Span 22. Demodulator Adjustment Locations Adjustment Procedures 23. External Mixer Bias Adjustment Setup External Mixer Bias Adjustment Non-OptionExternal Mixer Amplitude Adjustment Non-Option External Mixer Amplitude Adjustment Non-OptionSupplied with HP 8481D EXT MXR REF CAL 25. Rythm Adjustment Setup YIG-Tuned Filter/Mixer Rythm AdjustmentYIG-Tuned Filter/Mixer Rythm Adjustment Save Presel PK MHz PLL Adjustment MHz PLL Adjustment27 MHz PLL Adjustment Location MHz PLL Adjustment MHz Reference Adjustment Frequency Response Adjustment Software 3-l Frequency Response Adjustment SoftwareGetting Started Frequency Response Adjustment SoftwareSpectrum Analyzers Controller ComputerWarmup Time Test Equipment Warmup Spectrum Analyzer WarmupRequired Test Equipment Summary Adjustment Setups Computer Controller SetupEquipment Connections HP-IB CablesUsing Frequency Response Adjustment Software Loading the ProgramProgram Operation Conditions Menu Power SensorsTest Record Header Information System Mass Storage File LocationStoring and Loading the Conditions File Setting HP-IB AddressesExiting Frequency Response Adjustment Getting to the Adjust MenuVerifying the HP-IB Querying the Spectrum Analyzer Serial NumberSensor Utilities Menu Adding a Power Sensor Data FileAdjust Menu Calibrate Power Sensor Single TestList Equipment List Files Frequency Response Adjustment Menu SoftkeysSingle Test Cal Sensor List Equip Cond Menu Assemblies Adjusted APC 3.5 Cable 0 E’ Error Messages Beginning with Alphabetic Characters Frequency Response Adjustment Error MessagesFile filename not found Power meter reads value dBmInsufficient equip. to do test test number test name No HP-IB address listed for DUTError Messages Beginning with Numeric Characters Error Messages Beginning with Variables Assembly Replacement Assembly ReplacementAccess to Internal Assemblies Required Tools Cable Color CodeRemoval/Replacement Procedure I. Spectrum Analyzer CoverProcedure 2. Al Front Frame/Al8 CRT Procedure 2. Al Front Frame/Al8 CRTRemoval Procedure 2. Al Front Frame/Al8 CRT Instrument Discharging High Voltage on the CRT Assembly ReplacementA9, A18, and Line-Switch Assembly Mounting Screws Front frame Mounting Screws Installing the CRT and front frame Assemblies ReplacementPlacing the CRT into the Front Frame Assembly Replacement 4-lProcedure 2. Al Front Frame/Al8 CRT Procedure 3. AlAl Keyboard/Front Panel Keys Procedure 3. Al Al Keyboard/Front Panel KeysProcedure 4. AlA RPG Procedure 5. A2, A3, A4, and A5 Assemblies Procedure 5. A2, A3, A4, and A5 AssembliesAssembly Replacement 4 A2, A3, A4, and A5 Assembly Removal 4P3 Assembly Cables 2 Assembly Replacement Coaxial Cable Clip Procedure 5. A2, A3, A4, and AS Assemblies10. HP-IB and AlAl Wl Cable Placement Assembly Replacement Procedure 6. A6 Power Supply Assembly Procedure 6. A6 Power Supply AssemblyReplacement 1. A6 Power Supply Connections Assembly Replacement 12. Power Supply Cover Assembly Replacement Procedure 7. A6Al High Voltage Assembly Procedure 7. A6Al High Voltage Assembly13. Al6 Fast ADC and Al7 CRT Driver Mounting Screws Procedure 7. A6Al High Voltage Assembly Procedure 8. A7 through Al3 Assemblies 14. HP 6562E Assembly Locations Procedure 6. A7 through Al3 AssembliesA7 First LO Distribution Amplifier Assembly Replacement 4-3 A8 Low Band MixerA8 Low Band Mixer A9 Input Attenuator A9 Input Attenuator 16. A10 Mounting Screws A10 YIG-Tuned Filter/Mixer RythmAll YTO All YTOAl3 Second Converter Procedure 9. Al4 and A15 Assemblies Procedure 9. Al4 and Al5 AssembliesProcedure 9. Al4 and Al5 Assemblies 19. Al4 and Al5 Assembly Cables Assembly Replacement 20. Al6 and Al7 Mounting Screws Assembly Replacement Procedure 10. Al6 Fast ADC and Al7 CRT Driver21. Al6 Cable Routing Assembly Replacement Procedure 10. Al6 Fast ADC and Al7 CRT DriverProcedure 11. Bl Fan Procedure 12. ET1 Battery Procedure 12. BTI BatteryProcedure 13. Rear Frame/Rear Dress Panel 22. Main Deck Screws Procedure 13. Rear Frame/Rear Dress PanelW24, coax 5 W23, coax 23. A6 Power Supply Cover Assembly Replacement Personnel and damage to the instrument Procedure 14. W3 Line Switch Cable24. W3 Dress and Connection to A6 Power Supply Procedure 14. W3 Line Switch CableScrew Quantity Standoff 26. W3 Cable Connector Replacement Using Contact Removal Tool, HP part numberReplacement without Contact Removal Tool 27. Side Frame Mounting Screws Procedure 15. Eerom A2U500 Procedure 15. Eerom A2U50028. A21 Ocxo Mounting Screws Assembly Replacement Procedure 16. A21 OcxoProcedure 16. A21 Ocxo Ordering Information Direct Mail-Order SystemReplaceable Parts 5-l Firmware-Dependent Part Numbers Parts List FormatDirect Phone-Order System Replaceable PartsReference Designations, Abbreviations and Multipliers Reference Designations, Abbreviations, and Multipliers 2 Reference Designations, Abbreviations, and Multipliers 3 Reference Designations, Abbreviations, and Multipliers 4 Manufacturers Code ListQty Front Frame Assembly Front Handle ASS’Y Mount FlangeSLIDE-CHAS 25-IN-LG 21.84-IN-TRVL Cable Assembly Probe POWER/LED Cable Assembly RibbonController Assembly Interface AssemblyHP-IB Assembly CRT Driver Assembly CRT AssemblyBattery 3.0 V 1.2 A-HR Lithium Not Assigned Line Filter AssemblyIf 1 Bottom Cable Assembly Line Switch Power CABLE, RibbonCable ASSEMBLY, Speaker Cable ASSEMBLY, A7/A8 DriveCable ASSEMBLY, Coax 97, LO Sweep Cable ASSEMBLY, A10 Rythm DriveCable ASSEMBLY, Coax Cable ASSEMBLY, Coax 6, 0 Span VideoCable ASSEMBLY, SEMI-RIGID, 1ST Mixer Cable ASSEMBLY, SEMI-RIGID, 1ST LOCable ASSEMBLY, Coax 89, CAL OUT Cable ASSEMBLY, SEMI-RIGID, RF InputParts Identification, Assembly Mounting Parts List, Cover Assembly SPACER, CRT TUBE, CRT Parts List, Main ChassisParts List, RF Section Parts List, Front Frame Probe Power Jack00000 Rubber Keypad Includes Keycaps SCREW-MACHINE Assembly M3 X 0.5 12MM-LGLED-LAMP LUM-INT=560UCD IF=SOMA-MAX Keycap Line5062-7755 3 1 Battery Holder Includes Wires Parts List, Rear FrameMonofluoride Line Filter Module\ \ ‘v’ FI c P3$CES ‘\‘\ Major Assembly and Cable Locations Major Assembly and Cable LocationsA21OCXO FL3 not Assigned FL4Cables Hinged Assemblies 1W2 W52 I T E Bottom View Al5 Unfolded Major Assembly and Cable Locations WI8 Aiai Al6 Fast ADC Option Major Assembly and Cable Locations \\\ Rear View Major Assembly and Cable Locations 6-l Assembly Level Text Block DiagramsGeneral Troubleshooting 7-l General Troubleshooting Assembly Test PointsRibbon Cables Pad@AMPLIFIER Ribbon Cable Connections 1 General Troubleshooting Ribbon Cable Connections 2 General Troubleshooting Service Cal Data Softkey Menus PKEq Service Cal Data MenuTroubleshooting to a Functional Section Sloda Location of Assembly Troubleshooting TextRythm CRTLoading the software TAM Test and Adjustment ModuleHP-IB addresses Data files and system mass storage filesExecuting a test TAM Requirements Revision Connectors Test ConnectorsInconsistent Results Erroneous ResultsDisplay/Power Supply Automatic Fault IsolationController Check ADC/lnterface CheckManual Probe Troubleshooting LO Control CheckRF Low Band Check Calibration Oscillator Troubleshooting Mode RF Path Fault IsolationViewing Multiple Messages Error MessagesError Message Elimination System Analyzer Programming Errors 100 toSystem ADC Errors 200 toYTO Loop Errors 300 to Roller PLL Errors 302 toLO and RF Hardware/Firmware Failures 300 to General Troubleshooting General Troubleshooting YTO Loop Errors 317 to Roller Oscillator Errors 321 to OFF Unlk Freq ACC YTO Loop ErrorYTO Leveling Loop MHz Reference LoopSampling Oscillator Fractional N PLLSpan Accuracy Calibration Errors 356 to YTO Loop Settling Errors 351 toAutomatic if Errors 400 to RBW RBW 3K LIN Ampl LOG Ampl General Troubleshooting 7-3General Troubleshooting Ampl 1M General Troubleshooting General Troubleshooting 300 MHz System Errors 600 to Digital and Checksum Errors 700 toEerom Checksum Errors 700 to ROM U306 ROM U307 ROM U308 ROM U309 ROM U310 ROM U311 Program ROM Checksum Errors 705 toModel Number Error Battery ProblemRAM Check Errors 711 to Microprocessor Error 7System Errors 750 to Fast ADC ErrorOption Module Errors 800 to TG Unlvl User-Generated Errors 900 toFunctional Sections General Troubleshooting Block Diagram DescriptionA7 Sloda RF SectionA10 YIG-Tuned Filter/Mixer Al3 Second ConverterSecond if Amplifier part of A15 Flatness Compensation Amplifiers part of AM Third Converter part of A15Sweeping the First LO Synthesizer SectionReference PLL part of A15 YTO PLL A7, All, part of A14, part of A15Offset Lock Loop part of A15 Phase Lock Loops Fractional N PLL part of A14If Section A4 Log Amplifier/Cal Oscillator AssemblyA5 if Assembly ADC/lnterface SectionLog Expand/Video Functions Controller Section TriggeringFirmware A6 Power Supply Display/Power Supply SectionDisplay ASM Al7 CRT Display DriverPage Page Page Page ADC/lnterface Section ADC/lnterface SectionW2 Control Cable Connections GND RF Gain LO3 ERR LVFC-ENABLE FC ERR YTO ERR ADC/lntetface SectionGND Scan Ramp Video Trigger DAC2 A3 Test Connectors Troubleshooting Using the TAMADC ASM ADC MUX Automatic Fault Isolation ReferencesTAM Tests versus A3 Test Connectors Keyboard/RPG Problems Keyboard InterfaceKeyboard Matrix RPG Interface Counter Frequencies Triggering or Video Gating ProblemsTrigger MUX Truth Table Free RUN Video Line External10 ADC/lnterface Section Level Yiiqx5q12 ADC/lntertace Section Preselector Peaking Control Real Time DACADC/lntefface Section Flatness Control RF Gain DACs14 ADC/lnterface Section A3 Assembly Video CircuitsLog Offset/Log Expand 16 ADC/lnterface Section Video MUXVideo Filter Video Filter Buffer Amplifier Latch Outputs18 ADC/lnterface Section Positive/Negative Peak Detectors Select Desectdr POS Peak modePeak Detector Reset HMUX-SELO/l versus Detector Mode20 ADC/lnterface Section ADC MUX Rosenfell Detector22 ADC/lnterface Section Logic Levels at A3U108Track and Hold Variable Gain Amplifier VGAA3 Assembly ADC Circuits ADC Control Signals24 ADC/lnterface Section ADC Start/Stop Control 26 ADC/lnterface Section ADC ASMRamp Counter A3 Assembly Control Circuits Analog Bus Drivers28 ADC/lnterface Section Analog Bus Timing 10. Demultiple er A3U410 Truth Table Interface Strobe Select1. Demultiple er A3U500 Truth Table 30 ADC/lnterface SectionVideo Input Scaling Amplifiers and Limiter Al6 Assembly Fast ADC Circuits Option32 ADC/lnterface Section Bit Flash ADCByte Static RAM Peak/Pit DetectionPOS NEGCPU Interface and Control Registers Al6 Assembly Fast ADC Control Circuits Option13. Control Word at Primary Address U3 and U4 34 ADC/lntertace SectionLsample Vtrig POLLadcen LloadaddrReference Clock 38 ADC/lnterface SectionHswp Trigger Clock and Sample Rate GeneratorBit 32 K Circular Address Counter Bit Post-Trigger CounterVideo Trigger Comparator Page QEL--QWa5-w---w If -l If SectionIf Section A4 LOG AMP/CAL OSC Troubleshooting A5 with the TAM Troubleshooting the Log Amplifier with the TAMTAM Tests versus Test Connectors Ifdac FdacCal fist Troubleshooting Nude Troubleshooting the Cal Oscillator with the TAM Sweep Width Settings Automatic if AdjustmentParameters Adjusted Requirements Performance Test Failures If Gain Uncertainty Performance lestScale Fidelity Performance lest Log Amplifier P/O A4 Assembly Resolution Bandwidths Performance TestsLog Amplifier If Gain Application Guidelines ATTEN=lO dB Linear AmplifiersVideo Off set Video Output Frequency Counter Prescaler/ConditionerAM/FM Demodulator MHz if Filters KHz if FiltersMHz Vcxo KHz and 10.7 MHz if FiltersInput Switch LO SwitchSynchronous Detector Log Off set/Gain Compensation A5 if Assembly KHz If SignatureIf Adjust Signature If Section Detailed if Adjust Signature LOG Ofysets 510 CjBm,-‘-ifTiN= dB 0 dBm II ill M P L E IIilI Common if Signature ProblemsL3klB 11. Region B Amplitude Variation 500 MHz Resolution Bandwidth ProblemsKHz and 10 kHz Resolution Bandwidth Problems KHz Resolution Bandwidth ProblemsStep Gains 15. Faulty Crystal SymmetryCal Oscillator P/O A4 Assembly Inadequate CAL OSC Amptd Range Cal Oscillator Unlock at Beginning of if AdjustHz to 3 kHz Resolution Bandwidth Out of Specification 16. Output Waveform, 10 kHz Resolution Bandwidth If Section 17. Output Waveform, 3 kHz Resolution Bandwidth 19. Output Waveform, 300 Hz Resolution Bandwidth Low-Pass Filter Sweep GeneratorAM/FM Demodulation, Audio Amplifier, and Speaker If Section Page Page Page Controller -l Controller Section2 Controller Section MSl, MS3 through MS6, MS8Controller Section A2 Test ConnectorsDisplay Problems Digital Signature Analysis DSALine Generators Line Generator Output Waveforms BlankingBlanking Waveforms 6 Controller Section Expanded Blanking Waveforms Display Jumbled or Trace Off ScreenIO-8 Controller Section Switch Driver Waveform LcharDistorted X/Y Line Generator Waveforms Intensity Bad Characters or GraticuleLo-10 Controller Section Delta X Waveform Long Lines Dimmer Than Short LinesLo-12 Controller Section Analog Zero-Span Problems Non-OptionController Section lo Frequency-Count Marker ProblemsFrequency Counter Gate TimesLo-14 Controller Section Controller Section lo-15 State- and Trace-Storage ProblemsLo-16 Controller Section Keyboard ProblemsPage Synthesizer l-1 Synthesizer SectionSynthesizer Section A21 OcxoTAM Connector Pin Locations L. Measured Signal Line Location Al4 and Al5 Test Connectors4 Synthesizer Section Synthesizer l-5 DAC MS7 6 Synthesizer SectionFAV YTFAGC OFLMS1 MS2 MS3 MS4 MS6 MS8 MS5,MS7,MS8 MS8 MS2 MS5 MS6 MS7Confirming a Faulty Synthesizer Section Troubleshooting Test Setup8 Synthesizer Section YTO PLLCheck A3 ADC MUX Function Block steps Center Frequency Tuning ValuesCheck A14J301 10 MHz reference input steps Synthesizer l-9Check First LO steps Check Al4 frequency control assembly stepsSynthesizer -l YTO Loop Test Setup Check Al5 RF assembly steps12 Synthesizer Section 4. Sampler and Sampling Oscillator Test SetupPLL Locked at Wrong Frequency General PLL TroubleshootingSampling Oscillator Test Frequencies SynthesizerPLL Locked at Wrong Frequency Synthesizer Section REF- \ YSynthesizer l-15 Unlocked PLLUnlocked Reference PLL TroubleshootingOperation Check 100 MHz VCXO, tripler, and doubler stepsCheck phase/frequency detector steps Check 10 MHz reference to phase/frequency detector stepsCheck the 100 MHz lock loop integrator steps Check level at amplifier input steps Third LO Driver AmplifierCheck loop references steps 1 Unlocked Offset Lock Loop Sampling OscillatorCheck levels into mixer steps 20 Synthesizer SectionSampling Oscillator PLL Divide Numbers Check path to phase/frequency detector steps Unlocked YTO PLL 7. Amplifier Polarities 7. Troubleshooting an Unlocked YTO PLL Synthesizer l-25 Troubleshooting an Unlocked YTO PLL26 Synthesizer Section Check First LO pretune frequency and amplitude stepsCheck sampler drive output of A7 Sloda steps Check the fractional N oscillator stepsCheck sampler if steps Check FM loop sense stepsSynthesizer Section Check main coil coarse and fine DACs steps Voltages in FM Coil and Main Loop DriversCheck main coil tune DAC steps Main Coil Coarse and Fine DACs Voltages30 Synthesizer Section Confirming an Unlocked Condition Unlocked Fractional N PLLFractional N PLL 10. Postscaler Divide Numbers32 Synthesizer Section 1 1. Unlocked Fractional N Troubleshooting Areas VcoVCO 0AT VOLTAGE-CONTROLLED Oscillator Synthesizer l-35 12. Divider and Integrator Troubleshooting13. Sweep Signal Destination versus Span Frequency Span Accuracy ProblemsDetermining the First LO Span 14. Harmonic Mixing Number versus Center FrequencySynthesizer l-37 Confirming Span ProblemsYTO FM Coil Span Problems LO Spans 2.01 MHz to 20 MHz YTO Main Coil Span Problems LO Spans 20 MHz15. Settings of Sweep Switches 38 Synthesizer SectionSynthesizer l-39 Fractional N Span Problems LO Spans 52 MHzCheck span attenuator steps First LO Span Problems All SpansCheck current source steps 40 Synthesizer Section16. Settings for Switches and Comparators First LO Span Problems Multiband SweepsHP 6562E Sweep and Scan Ramps Synthesizer Section Phase Noise Problems Phase Noise in Locked versus Unlocked SpansReference versus Reference PLL Phase Noise Fractional N PLL Phase Noise Fractional N versus Offset PLL or YTO PLL Phase NoiseSampler and Sampler if Sweep Generator Circuit Set a microwave source to the following settings10. Simplified Synthesizer Section JP/O a l Al5 RF 50 Synthesizer Section A21 OcxoPage Page RF Section RF SectionAl4 and Al5 Test Connectors RF Section Automatic Fault Isolation References PIN Low Band ProblemsLow and High Band Problems High Band ProblemsA7 LO Distribution Amplifier ‘0 0 0 0 0 0A8 Low Band Mixer A9 Input Attenuator Low RF Section Al4 Frequency Control Assembly Loda DriveRF -l A7 First LO Distribution Amplifier Drive Control Latch for Band-Switch DriverYTF Driver Circuit HP 8582E Rear-Panel LO SWP Output FE RUIPbbzl Offset Sweep + Tune Multiplier ValuesAl5 RF Assembly Confirming a Faulty Third ConverterConfirming Third Converter Output Third Converter Control Latches Flatness Compensation ControlSIG ID Oscillator Option Q604 on MHz ReferenceMHz Reference at A15J302 RF Section MHz TTL Reference at U304 Pin RF Section RF Section Mnemonic Table Page Isplay/Power Supply Section @I w3 Wl Power-Cable Connections GNDPWR UP Pms Pins 41’ +28 Al7 Test Connector TAM Tests versus Test Connectors Blank Display Using the TAMBlank Display Probe Power Socket Blanking SignalDisplay Distortion Focus Problems Intensity Problems Display/Power Supply -l A6 Power Supply Assembly Troubleshooting Dead Power SupplyCheck the Supply Voltages Buck Regulator Kick-start/BiasSupply Restarting Every 1.5 Seconds Kick Start Line Fuse BlowingLow Voltage Supplies Buck Regulator Control LoopHigh Voltage Supplies CRT Supply Dropping Out DC-DC Converter Control Buck Regulator ControlPower Up Page Page Component-Level Information Packets A-l Component-Level Information PacketsComponent-Level Information Packets Table A-l. HP 8562 Spectrum Analyzer Documented AssembliesComponent-Level Information Packets A-3 Table A-l. HP 8582 Spectrum Analyzer Documented AssembliesPage Index-l OcxoAFI Index-2Fadc Index-3Index-4 Loda Index-5Index-6 Index-7 Index-6