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Agilent Technologies 856290216 service manual Ribbon Cable Connections 2 General Troubleshooting

Models: 856290216

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I	OA2 035	3 6	. OAl
I	D CND I. 37	3 8	.IO A O

R E A R P A N E L J 3

LDPT STROBE				.	5 0	4 9 .		D GND
LDPT STROBE				.	5 0	4 9 .		D GND
BADC	CLKI			.	48	4 7 .		+2av
	+5VF			.	4 6	45 .		+5VF
OPT	R/Li			.	4 4	4 3 .		fl5VF
LHALT				0	4 2	4 ,	0 t15VF
O P T I O N IRO				.	4 0	3 9 .		L O P T I / O
0 GND				•	36	3 7	0	LOPT PROG
	OA15			.	36	3 5 .		LOPTION ID
	OA14			.	3 4	3 3 .		OA13
-15VF				.	3 2	3 , .		OA12
	OAll			.	30	29 .		+5VF
	OAIO			.	2 8	2 7 .		OA9
WR PROT				.	26	2 5 .		OAa
	OA7			.	2 4	2 3 .		D GND
	OA6			.	2 2	2, .		OA5
D G N D				•	2 0	lg.		O A 4
	OA3			.	16	1 7	0	D GND
	OA2			.	16	,zj .		OAI
D	GND			.	14	13 .		OAO
	OD7			.	12	1 1 .		D GND
	OD6			.	10	9 .		OD5
D GND				.	8	7 .		OD4
	OD3			.	6	5 .		D GND
	OD2			•	4	3 .		ODl
Cl	GND			.	2	1 •		ODO

A2J2

	I	LINTFCE STB
		LINTFCE STB
		D GND
		D GND
		D GND
		D GND
A3Wl		IA9
A3Wl		BKT PULSE
I NTERFACE		STEP BID1
		PLLI
CABLE

CONNECTIONS

.	3 4	3 3 .	DPKD	CLK
.	3 2	31 .	A D C	IRO
.	3 0	29 .	LKEY	RPG IRG
.	26	2 7 .	+lOV	REF
.	26	2 5 .	CAL OSC TUNE
.	24	2 3 .	HB ADC CLK 0
0	22	21 .	IA10
.	2 0	19 .	IR/LW
.	la	17 .	IAB
0	16	15 .	BID0

AISJI	REAR
	P A N E L J2

A19Wl

HPIB C A B L E CONNECTIONS

				DlOl	•	24	2 3 .			D105
				D102	.	22	21 .			D106
				Dl03	.	20	19 .			D107
0104	07	a •	D108	D104	0	10	17	0		DlOa
EOI	09	10 .	REN	EOI	I.	16	15	•I		REN
DAV	. 11	12.	DGND	DAV	.	14	13 .			D	GND
NRFD	0 1 3	14.	DGND	NRFD L0211•						D GND
NDAC	. 1 5	1 6 .	DGND	NDAC	•	10	9 .			D	GND
IFC	.• 1197	18•.	DGND	IFC	•	8	7 .			D	GND
SRO		2 0	D GND	SRO	0	6	5 .			D	GND
				ATN	•	4	3 .			D	GND
				NC	02		1 .			D	GND

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Figure 7-2. Ribbon Cable Connections (2 of 2)

General Troubleshooting 7-5

Image 224

Agilent Technologies 856290216 service manual Ribbon Cable Connections 2 General Troubleshooting

Contents

About this Manual Fia Hewlett HP Part No -90218 SupersedesPage Regulatory Information WarrantyCertification Safety Notes AssistanceGeneral Safety Considerations Prevent electrical shock, do not remove coversThis guide uses the following conventions How to Use This GuideDocumentation Outline 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 Contents-15 TablesPLL General Information l-1 Serial Numbers and Repair InformationSerial Number Label Example Instrument Variations Table l- 1. Instrument VariationsGeneral Information A21 OcxoHP 85629B Test and Adjustment Module General Information l-3Electrostatic Discharge Service KitTable l-2. Service Kit Contents Reducing Potential for ESD Damage General Information l-5Returning Instruments for Service Static-Safe AccessoriesService Tag Static-Safe AccessoriesOther Packaging 9211-6969 Outer Carton 9220-5073 Pads 9220-5072 Top Tray Recommended Test Equipment General Information l-9Table l-4. Recommended Test Equipment Instrument SourcesRecommended Test Equipment General Information l-lInstrument Critical Specifications Recommended Use Instrument Accessories PAV PAM Sales and Service Offices Hewlett-Packard Sales and Service Offices US Field OperationsAdjustment Procedures IntroductionSafety Considerations Which Adjustments Should Be Performed?Adjustable and Factory-Selected Components Test Equipment8710-0033 Adjustment ToolsInstrument Service Position Related Adjustments A5 ifA10 Rythm Adjustable Components HV ADJ FM SpanSmpl Match VCO RangeFactory Selected Components Using the TAM Adjustment IndicatorTAM Adjustments YTOAdjustment Procedures 2-l Required Test Equipment for TAMFront End Cal adjustment High Voltage Power Supply Adjustment Assembly AdjustedHigh Voltage Power Supply Adjustment Related Performance TestProcedure EquipmentDisplay Adjustment Display AdjustmentDeflection Adjustments Preliminary AdjustmentsCutoff Adjustment CRT Adjust Pattern Adjustment Procedures Intensity Adjustments Fast Zero Span Adjustments A2 Display Adjustment LocationsPress SAVEI, Save State ,and State If Bandpass Adjustment If Bandpass AdjustmentLC Bandpass Adjustments TAM Connector Pin LocationsXtal Bandpass Adjustments Factory-Selected LC Filter CapacitorsFactory-Selected Xtal Filter Capacitors Xtal Factory-Selected Capacitor SelectionA5T200 Xtal CTR A5T202 Xtal CTRIf Bandpass Adjustment 10. Capacitor Part Numbers If Amplitude Adjustments Related Performance TestsIf Amplitude Adjustments If Amplitude Adjustment LocationsA5 Reference Attenuator Adjustment A5 Adjustment Verification DC Log Amplifier Adjustments DC Log Adjustment Setup Adjustment ProceduresA4 Limiter Phase Adjustment DC Log Amplifier AdjustmentsA4 Linear Fidelity Adjustment Log Amplifier AdjustmentsA4 LOG Fidelity Adjustment Press -,a, if AlI on OFF OFF, AD3 Curr if StateSampling Oscillator Adjustment 11. Sampler Adjustment SetupSampling Oscillator Adjustment Sampling Oscillator AdjustmentSampler Match Adjustment Sampling Oscillator Adjustment 1. Sampling Adjustments YTO Adjustment YTO AdjustmentYTO Main Coil Adjustments 07SAVE Save STATE, State RECALL, Recall STATE, StateYTO FM Coil Adjustments 14. YTO Adjustment LocationsLO Distribution Amplifier Adjustment 15. First LO Distribution Amplifier Adjustment SetupLO Distribution Amplifier Adjustment 18. TAM Connector Pin LocationsDAC value for 4.60 GHz = Frequency Response Adjustment Frequency Response AdjustmentAutomated Procedure Available 17. Frequency Response Adjustment Setup MHz RF gain DAC value Frequency‘Response Adjustment Calibrator Amplitude Adjustment Calibrator Amplitude AdjustmentMHz Reference Adjustment-OCXO Non-Option MHz Reference Adjustment-OCXO Non-Option 19 MHz Reference Adjustment Setup and Adjustment LocationOFF MHz Reference Adjustment-TCXO Option MHz Reference Adjustment-TCXO OptionProcedure Demodulator Adjustment Demodulator AdjustmentSPAN, Zero Span 22. Demodulator Adjustment Locations Adjustment Procedures External Mixer Bias Adjustment Non-Option 23. External Mixer Bias Adjustment SetupExternal Mixer Amplitude Adjustment Non-Option External Mixer Amplitude Adjustment Non-OptionSupplied with HP 8481D EXT MXR REF CAL YIG-Tuned Filter/Mixer Rythm Adjustment 25. Rythm Adjustment SetupYIG-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 Frequency Response Adjustment Software 3-lFrequency Response Adjustment Software Getting StartedSpectrum Analyzers Controller ComputerRequired Test Equipment Summary Warmup TimeTest Equipment Warmup Spectrum Analyzer Warmup Computer Controller Setup Adjustment SetupsEquipment Connections HP-IB CablesProgram Operation Using Frequency Response Adjustment SoftwareLoading the Program Power Sensors Conditions MenuTest Record Header Information System Mass Storage File LocationSetting HP-IB Addresses Storing and Loading the Conditions FileGetting to the Adjust Menu Exiting Frequency Response AdjustmentVerifying the HP-IB Querying the Spectrum Analyzer Serial NumberAdding a Power Sensor Data File Sensor Utilities MenuAdjust Menu List Equipment Calibrate Power SensorSingle Test Frequency Response Adjustment Menu Softkeys List FilesSingle Test Cal Sensor List Equip Cond Menu Assemblies Adjusted APC 3.5 Cable 0 E’ Frequency Response Adjustment Error Messages Error Messages Beginning with Alphabetic CharactersPower meter reads value dBm File filename not foundInsufficient 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 Cable Color Code Required ToolsProcedure I. Spectrum Analyzer Cover Removal/ReplacementRemoval Procedure 2. Al Front Frame/Al8 CRTProcedure 2. Al Front Frame/Al8 CRT Procedure 2. Al Front Frame/Al8 CRT Discharging High Voltage on the CRT Assembly Replacement InstrumentA9, A18, and Line-Switch Assembly Mounting Screws Front frame Mounting Screws Replacement Installing the CRT and front frame AssembliesAssembly Replacement 4-l Placing the CRT into the Front FrameProcedure 2. Al Front Frame/Al8 CRT Procedure 3. Al Al Keyboard/Front Panel Keys Procedure 3. AlAl Keyboard/Front Panel KeysProcedure 4. AlA RPG Assembly Replacement 4 Procedure 5. A2, A3, A4, and A5 AssembliesProcedure 5. A2, A3, A4, and A5 Assemblies A2, A3, A4, and A5 Assembly Removal 4P3 Assembly Cables 2 Assembly Replacement Procedure 5. A2, A3, A4, and AS Assemblies Coaxial Cable Clip10. 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 Procedure 6. A7 through Al3 Assemblies 14. HP 6562E Assembly LocationsA7 First LO Distribution Amplifier A8 Low Band Mixer Assembly Replacement 4-3A8 Low Band Mixer A9 Input Attenuator A9 Input Attenuator A10 YIG-Tuned Filter/Mixer Rythm 16. A10 Mounting ScrewsAll YTO All YTOAl3 Second Converter Procedure 9. Al4 and Al5 Assemblies Procedure 9. Al4 and A15 AssembliesProcedure 9. Al4 and Al5 Assemblies 19. Al4 and Al5 Assembly Cables Assembly Replacement Procedure 10. Al6 Fast ADC and Al7 CRT Driver 20. Al6 and Al7 Mounting Screws Assembly ReplacementProcedure 10. Al6 Fast ADC and Al7 CRT Driver 21. Al6 Cable Routing Assembly ReplacementProcedure 11. Bl Fan Procedure 12. BTI Battery Procedure 12. ET1 BatteryProcedure 13. Rear Frame/Rear Dress Panel Procedure 13. Rear Frame/Rear Dress Panel 22. Main Deck ScrewsW24, coax 5 W23, coax 23. A6 Power Supply Cover Assembly Replacement Procedure 14. W3 Line Switch Cable Personnel and damage to the instrumentProcedure 14. W3 Line Switch Cable 24. W3 Dress and Connection to A6 Power SupplyScrew Quantity Standoff Replacement Using Contact Removal Tool, HP part number 26. W3 Cable ConnectorReplacement without Contact Removal Tool 27. Side Frame Mounting Screws Procedure 15. Eerom A2U500 Procedure 15. Eerom A2U500Procedure 16. A21 Ocxo 28. A21 Ocxo Mounting Screws Assembly ReplacementProcedure 16. A21 Ocxo Replaceable Parts 5-l Ordering InformationDirect Mail-Order System Parts List Format Firmware-Dependent Part NumbersDirect Phone-Order System Replaceable PartsReference Designations, Abbreviations and Multipliers Reference Designations, Abbreviations, and Multipliers 2 Reference Designations, Abbreviations, and Multipliers 3 Manufacturers Code List Reference Designations, Abbreviations, and Multipliers 4Qty SLIDE-CHAS 25-IN-LG 21.84-IN-TRVL Front Frame AssemblyFront Handle ASS’Y Mount Flange Cable Assembly Ribbon Cable Assembly Probe POWER/LEDController Assembly Interface AssemblyCRT Driver Assembly CRT Assembly HP-IB AssemblyBattery 3.0 V 1.2 A-HR Lithium Not Assigned Line Filter AssemblyIf 1 Bottom Power CABLE, Ribbon Cable Assembly Line SwitchCable ASSEMBLY, Speaker Cable ASSEMBLY, A7/A8 DriveCable ASSEMBLY, A10 Rythm Drive Cable ASSEMBLY, Coax 97, LO SweepCable ASSEMBLY, Coax Cable ASSEMBLY, Coax 6, 0 Span VideoCable ASSEMBLY, SEMI-RIGID, 1ST LO Cable ASSEMBLY, SEMI-RIGID, 1ST MixerCable ASSEMBLY, Coax 89, CAL OUT Cable ASSEMBLY, SEMI-RIGID, RF InputParts Identification, Assembly Mounting Parts List, Cover Assembly Parts List, Main Chassis SPACER, CRT TUBE, CRTParts List, RF Section 00000 Parts List, Front FrameProbe Power Jack SCREW-MACHINE Assembly M3 X 0.5 12MM-LG Rubber Keypad Includes KeycapsLED-LAMP LUM-INT=560UCD IF=SOMA-MAX Keycap LineParts List, Rear Frame 5062-7755 3 1 Battery Holder Includes WiresMonofluoride Line Filter Module\ \ ‘v’ FI c P3$CES ‘\‘\ Major Assembly and Cable Locations Major Assembly and Cable LocationsFL3 not Assigned FL4 A21OCXOCables 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 General Troubleshooting 7-l Assembly Level TextBlock Diagrams Assembly Test Points General TroubleshootingRibbon Cables Pad@AMPLIFIER Ribbon Cable Connections 1 General Troubleshooting Ribbon Cable Connections 2 General Troubleshooting Service Cal Data Softkey Menus Service Cal Data Menu PKEqTroubleshooting to a Functional Section Location of Assembly Troubleshooting Text SlodaRythm CRTTAM Test and Adjustment Module Loading the softwareExecuting a test HP-IB addressesData files and system mass storage files TAM Requirements Test Connectors Revision ConnectorsInconsistent Results Erroneous ResultsAutomatic Fault Isolation Display/Power SupplyController Check ADC/lnterface CheckRF Low Band Check Manual Probe TroubleshootingLO Control Check RF Path Fault Isolation Calibration Oscillator Troubleshooting ModeError Messages Viewing Multiple MessagesSystem Analyzer Programming Errors 100 to Error Message EliminationADC Errors 200 to SystemLO and RF Hardware/Firmware Failures 300 to YTO Loop Errors 300 toRoller PLL Errors 302 to General Troubleshooting General Troubleshooting YTO Loop Errors 317 to Roller Oscillator Errors 321 to YTO Loop Error OFF Unlk Freq ACCMHz Reference Loop YTO Leveling LoopSampling Oscillator Fractional N PLLYTO Loop Settling Errors 351 to Span Accuracy Calibration Errors 356 toAutomatic if Errors 400 to RBW RBW 3K General Troubleshooting 7-3 LIN Ampl LOG AmplGeneral Troubleshooting Ampl 1M General Troubleshooting General Troubleshooting 300 MHz Eerom Checksum Errors 700 to System Errors 600 toDigital and Checksum Errors 700 to Program ROM Checksum Errors 705 to ROM U306 ROM U307 ROM U308 ROM U309 ROM U310 ROM U311Battery Problem Model Number ErrorRAM Check Errors 711 to Microprocessor Error 7Option Module Errors 800 to System Errors 750 toFast ADC Error User-Generated Errors 900 to TG UnlvlBlock Diagram Description Functional Sections General TroubleshootingRF Section A7 SlodaSecond if Amplifier part of A15 A10 YIG-Tuned Filter/MixerAl3 Second Converter Third Converter part of A15 Flatness Compensation Amplifiers part of AMSynthesizer Section Sweeping the First LOReference PLL part of A15 YTO PLL A7, All, part of A14, part of A15Phase Lock Loops Fractional N PLL part of A14 Offset Lock Loop part of A15A4 Log Amplifier/Cal Oscillator Assembly If SectionLog Expand/Video Functions A5 if AssemblyADC/lnterface Section Firmware Controller SectionTriggering Display/Power Supply Section A6 Power SupplyDisplay ASM Al7 CRT Display DriverPage Page Page Page ADC/lnterface Section ADC/lnterface SectionW2 Control Cable Connections GND Scan Ramp Video Trigger DAC2 GND RF Gain LO3 ERR LVFC-ENABLE FC ERR YTO ERRADC/lntetface Section Troubleshooting Using the TAM A3 Test ConnectorsAutomatic Fault Isolation References ADC ASM ADC MUXTAM Tests versus A3 Test Connectors Keyboard Matrix Keyboard/RPG ProblemsKeyboard Interface RPG Interface Triggering or Video Gating Problems Counter FrequenciesTrigger MUX Truth Table Free RUN Video Line External10 ADC/lnterface Section Yiiqx5q LevelPreselector Peaking Control Real Time DAC 12 ADC/lntertace SectionFlatness Control RF Gain DACs ADC/lntefface SectionA3 Assembly Video Circuits 14 ADC/lnterface SectionLog Offset/Log Expand Video MUX 16 ADC/lnterface SectionVideo Filter 18 ADC/lnterface Section Video Filter Buffer AmplifierLatch Outputs Select Desectdr POS Peak mode Positive/Negative Peak Detectors20 ADC/lnterface Section Peak Detector ResetHMUX-SELO/l versus Detector Mode Rosenfell Detector ADC MUXLogic Levels at A3U108 22 ADC/lnterface SectionVariable Gain Amplifier VGA Track and Hold24 ADC/lnterface Section A3 Assembly ADC CircuitsADC Control Signals ADC Start/Stop Control ADC ASM 26 ADC/lnterface SectionRamp Counter 28 ADC/lnterface Section A3 Assembly Control CircuitsAnalog Bus Drivers Analog Bus Timing Interface Strobe Select 10. Demultiple er A3U410 Truth Table1. Demultiple er A3U500 Truth Table 30 ADC/lnterface SectionAl6 Assembly Fast ADC Circuits Option Video Input Scaling Amplifiers and LimiterBit Flash ADC 32 ADC/lnterface SectionPeak/Pit Detection Byte Static RAMPOS NEGAl6 Assembly Fast ADC Control Circuits Option CPU Interface and Control Registers13. Control Word at Primary Address U3 and U4 34 ADC/lntertace SectionVtrig POL LsampleLadcen LloadaddrHswp Reference Clock38 ADC/lnterface Section Clock and Sample Rate Generator TriggerBit Post-Trigger Counter Bit 32 K Circular Address CounterVideo Trigger Comparator Page QEL--QWa5-w---w If Section If -lIf Section A4 LOG AMP/CAL OSC Troubleshooting the Log Amplifier with the TAM Troubleshooting A5 with the TAMTAM Tests versus Test Connectors Fdac IfdacCal fist Troubleshooting Nude Troubleshooting the Cal Oscillator with the TAM Automatic if Adjustment Sweep Width SettingsParameters Adjusted Requirements Scale Fidelity Performance lest Performance Test FailuresIf Gain Uncertainty Performance lest Log Amplifier Log Amplifier P/O A4 AssemblyResolution Bandwidths Performance Tests Linear Amplifiers If Gain Application Guidelines ATTEN=lO dBVideo Off set AM/FM Demodulator Video OutputFrequency Counter Prescaler/Conditioner KHz if Filters MHz if FiltersKHz and 10.7 MHz if Filters MHz VcxoSynchronous Detector Input SwitchLO Switch Log Off set/Gain Compensation A5 if Assembly If Signature KHzIf Adjust Signature If Section Detailed if Adjust Signature LOG Ofysets Common if Signature Problems 510 CjBm,-‘-ifTiN= dB 0 dBm II ill M P L E IIilIL3klB 11. Region B Amplitude Variation MHz Resolution Bandwidth Problems 500KHz Resolution Bandwidth Problems KHz and 10 kHz Resolution Bandwidth Problems15. Faulty Crystal Symmetry Step GainsCal Oscillator P/O A4 Assembly Cal Oscillator Unlock at Beginning of if Adjust Inadequate CAL OSC Amptd RangeHz 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 AM/FM Demodulation, Audio Amplifier, and Speaker Low-Pass FilterSweep Generator If Section Page Page Page Controller Section Controller -lMSl, MS3 through MS6, MS8 2 Controller SectionA2 Test Connectors Controller SectionLine Generators Display ProblemsDigital Signature Analysis DSA Blanking Line Generator Output WaveformsBlanking Waveforms 6 Controller Section Display Jumbled or Trace Off Screen Expanded Blanking WaveformsSwitch Driver Waveform Lchar IO-8 Controller SectionDistorted X/Y Line Generator Waveforms Lo-10 Controller Section IntensityBad Characters or Graticule Long Lines Dimmer Than Short Lines Delta X WaveformAnalog Zero-Span Problems Non-Option Lo-12 Controller SectionFrequency-Count Marker Problems Controller Section loLo-14 Controller Section Frequency CounterGate Times State- and Trace-Storage Problems Controller Section lo-15Keyboard Problems Lo-16 Controller SectionPage Synthesizer Section Synthesizer l-1A21 Ocxo Synthesizer SectionAl4 and Al5 Test Connectors TAM Connector Pin Locations L. Measured Signal Line Location4 Synthesizer Section Synthesizer l-5 6 Synthesizer Section DAC MS7FAV YTFOFL AGCMS1 MS2 MS3 MS4 MS6 MS8 MS5,MS7,MS8 MS8 MS2 MS5 MS6 MS7Troubleshooting Test Setup Confirming a Faulty Synthesizer Section8 Synthesizer Section YTO PLLCenter Frequency Tuning Values Check A3 ADC MUX Function Block stepsCheck A14J301 10 MHz reference input steps Synthesizer l-9Check Al4 frequency control assembly steps Check First LO stepsYTO Loop Test Setup Check Al5 RF assembly steps Synthesizer -l4. Sampler and Sampling Oscillator Test Setup 12 Synthesizer SectionGeneral PLL Troubleshooting PLL Locked at Wrong FrequencySampling Oscillator Test Frequencies SynthesizerREF- \ Y PLL Locked at Wrong Frequency Synthesizer SectionUnlocked PLL Synthesizer l-15Troubleshooting Unlocked Reference PLLOperation Check 100 MHz VCXO, tripler, and doubler stepsCheck 10 MHz reference to phase/frequency detector steps Check phase/frequency detector stepsCheck the 100 MHz lock loop integrator steps Third LO Driver Amplifier Check level at amplifier input stepsUnlocked Offset Lock Loop Sampling Oscillator Check loop references steps 1Check levels into mixer steps 20 Synthesizer SectionSampling Oscillator PLL Divide Numbers Check path to phase/frequency detector steps Unlocked YTO PLL 7. Amplifier Polarities Troubleshooting an Unlocked YTO PLL 7. Troubleshooting an Unlocked YTO PLL Synthesizer l-25Check First LO pretune frequency and amplitude steps 26 Synthesizer SectionCheck the fractional N oscillator steps Check sampler drive output of A7 Sloda stepsCheck sampler if steps Check FM loop sense stepsSynthesizer Section Voltages in FM Coil and Main Loop Drivers Check main coil coarse and fine DACs stepsCheck main coil tune DAC steps Main Coil Coarse and Fine DACs Voltages30 Synthesizer Section Unlocked Fractional N PLL Confirming an Unlocked Condition32 Synthesizer Section Fractional N PLL10. Postscaler Divide Numbers VCO 1 1. Unlocked Fractional N Troubleshooting AreasVco 0AT VOLTAGE-CONTROLLED Oscillator 12. Divider and Integrator Troubleshooting Synthesizer l-35Frequency Span Accuracy Problems 13. Sweep Signal Destination versus SpanDetermining the First LO Span 14. Harmonic Mixing Number versus Center FrequencyConfirming Span Problems Synthesizer l-37YTO Main Coil Span Problems LO Spans 20 MHz YTO FM Coil Span Problems LO Spans 2.01 MHz to 20 MHz15. Settings of Sweep Switches 38 Synthesizer SectionFractional N Span Problems LO Spans 52 MHz Synthesizer l-39First LO Span Problems All Spans Check span attenuator stepsCheck current source steps 40 Synthesizer SectionFirst LO Span Problems Multiband Sweeps 16. Settings for Switches and ComparatorsHP 6562E Sweep and Scan Ramps Synthesizer Section Reference versus Reference PLL Phase Noise Phase Noise ProblemsPhase Noise in Locked versus Unlocked Spans Fractional N versus Offset PLL or YTO PLL Phase Noise Fractional N PLL Phase NoiseSampler and Sampler if Set a microwave source to the following settings Sweep Generator Circuit10. Simplified Synthesizer Section JP/O a l Al5 RF A21 Ocxo 50 Synthesizer SectionPage Page RF Section RF SectionAl4 and Al5 Test Connectors RF Section Automatic Fault Isolation References Low Band Problems PINHigh Band Problems Low and High Band Problems‘0 0 0 0 0 0 A7 LO Distribution AmplifierA8 Low Band Mixer A9 Input Attenuator Low RF Section RF -l Al4 Frequency Control AssemblyLoda Drive Control Latch for Band-Switch Driver A7 First LO Distribution Amplifier DriveYTF Driver Circuit FE RUI HP 8582E Rear-Panel LO SWP OutputSweep + Tune Multiplier Values Pbbzl OffsetConfirming Third Converter Output Al5 RF AssemblyConfirming a Faulty Third Converter Third Converter Flatness Compensation Control Control LatchesSIG ID Oscillator Option MHz Reference Q604 onMHz Reference at A15J302 RF Section MHz TTL Reference at U304 Pin RF Section RF Section Mnemonic Table Page Isplay/Power Supply Section @I w3 PWR UP Wl Power-Cable ConnectionsGND Pms Pins 41’ +28 Blank Display Using the TAM Al7 Test Connector TAM Tests versus Test ConnectorsBlank Display Blanking Signal Probe Power SocketDisplay Distortion Focus Problems Intensity Problems Display/Power Supply -l Check the Supply Voltages A6 Power Supply Assembly TroubleshootingDead Power Supply Kick-start/Bias Buck RegulatorLine Fuse Blowing Supply Restarting Every 1.5 Seconds Kick StartHigh Voltage Supplies Low Voltage SuppliesBuck Regulator Control Loop CRT Supply Dropping Out Buck Regulator Control DC-DC Converter ControlPower Up Page Page Component-Level Information Packets Component-Level Information Packets A-lTable A-l. HP 8562 Spectrum Analyzer Documented Assemblies Component-Level Information PacketsTable A-l. HP 8582 Spectrum Analyzer Documented Assemblies Component-Level Information Packets A-3Page Ocxo Index-lIndex-2 AFIIndex-3 FadcIndex-4 Index-5 LodaIndex-6 Index-7 Index-6