Agilent Technologies E4438C Guía de instalación

Service GuideAgilent TechnologiesESG Vector Signal GeneratorThis guide applies to signal generator models and associated serial number prefixes listed

x ContentsRemoval Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-77Remova

TroubleshootingTroubleshooting Analog Bus ADC Calibration Failures1-88Troubleshooting Analog Bus ADC Calibration FailuresThe Analog Bus ADC Calibratio

TroubleshootingTroubleshooting Analog Bus ADC Calibration Failures1-89Procedure for Signal Generators with Option UNJ• Run Self-Test 1100.— If Self-Te

TroubleshootingTroubleshooting Analog Bus ADC Calibration Failures1-90Procedure for Signal Generators with Option 506• Run Self-Test 1100.— If Self-Te

TroubleshootingTroubleshooting Performance Test Problems1-91Troubleshooting Performance Test Problems

TroubleshootingTroubleshooting Performance Test Problems1-92Table 1-40 Troubleshooting Performance Test ProblemsPerformance test that is failing... Ac

TroubleshootingTroubleshooting Performance Test Problems1-93Internal AM DistortionThis is part of the Internal AM Accuracy and Distortion performance

TroubleshootingTroubleshooting Performance Test Problems1-94AM Frequency Response •Perform:— Internal AM Accuracy (This is part of the Internal AM Acc

TroubleshootingTroubleshooting Performance Test Problems1-95Residual FM(Not Used with Option UNJ or Option 506)•Perform:—No adjustments.• If failing,

TroubleshootingTroubleshooting Performance Test Problems1-96Power Level Accuracy If the problem shows up at high power levels ≥−55 dBm:•Perform:— Digi

TroubleshootingTroubleshooting Performance Test Problems1-97Internal Digital Modulation Quality(Option 402 Only)•Perform:— All I/Q calibrations— I/Q M

Contents xiincludes the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)or the AT1 High-Power Mechanical Attenuator (Option UNB)wi

TroubleshootingTroubleshooting Performance Test Problems1-98Pulse Modulation On/Off Ratio •Perform:— No adjustments• If failing, troubleshoot the foll

TroubleshootingTroubleshooting Performance Test Problems1-99CDMA Adjacent Channel Power(Not Used with Option UNB or Option 506)Used for Option 401 Onl

TroubleshootingTroubleshooting Performance Test Problems1-100GSM Loopback BER Check(Option 300 Only)•Perform:— All I/Q adjustments— Internal Digital M

TroubleshootingTroubleshooting Harmonic Spurious1-101Troubleshooting Harmonic SpuriousHarmonics are multiples of the fundamental output frequency prod

TroubleshootingTroubleshooting Harmonic Spurious1-102To Verify Harmonic Performance at the RF Output1. Signal Generator Settingsa. Set the frequency o

TroubleshootingTroubleshooting Harmonic Spurious1-103To Verify Harmonic Performance at the Coherent Carrier Output1. Signal Generator Settingsa. Set t

TroubleshootingTroubleshooting Non-Harmonic Spurious1-104Troubleshooting Non-Harmonic SpuriousThere are many different groupings a spur can fall into.

TroubleshootingTroubleshooting Non-Harmonic Spurious1-105Sampler Spurs Option UNJ and Option 506These spurs are generated when the sampler IF frequenc

TroubleshootingTroubleshooting Phase Noise (Option UNJ and Option 506 Only)1-106Troubleshooting Phase Noise (Option UNJ and Option 506 Only)Poor groun

TroubleshootingTroubleshooting Pulse Modulation and LF Out1-107Troubleshooting Pulse Modulation and LF OutThe pulse waveform originates on the A23 Mot

xii ContentsHardware of the Rear-Panel(Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) . . . . . . . . . . . . . . . . 3-77Hardware

TroubleshootingTroubleshooting Pulse Modulation and LF Out1-108To Verify the Pulse Waveform at the A19 Daughterboard (All Options)1. Turn power off to

TroubleshootingTroubleshooting Pulse Modulation and LF Out1-1094. Turn power on to the signal generator and configure it for pulse mode.a. Press the P

TroubleshootingTroubleshooting Pulse Modulation and LF Out1-110To Verify the Pulse Waveform at the A19 Daughterboard (Option 506 Only)1. Turn power of

TroubleshootingTroubleshooting Pulse Modulation and LF Out1-1114. Turn power on to the signal generator and configure it for pulse mode.a. Press the P

TroubleshootingTroubleshooting Pulse Modulation and LF Out1-112No Pulse Signal from LF OutTo function, the internal pulse generator on the A23 Motherb

TroubleshootingContacting Agilent Technologies1-113Contacting Agilent TechnologiesIf you should have a problem with your signal generator, contact you

TroubleshootingContacting Agilent Technologies1-114Contacting Agilent Sales and Service OfficesBefore contacting Agilent, read the warranty printed in

TroubleshootingContacting Agilent Technologies1-115Returning Your Signal Generator for ServiceUse the information in this section if you need to retur

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-116Block Descriptions for Option 501, 502, 503, 504This section contains block descri

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-117Overall Block Description for Option 501, 502, 503, 504OverviewThe objective of th

1-11 Troubleshooting

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-118Front Panel Hardkeys, Softkeys, and KeypadSome front panel keys are referred to as

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-119made between a reference voltage and the detected voltage. If the detected and ref

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-120Frequency Synthesis Block Description for Option 501, 502, 503, 504OverviewFrequen

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-121A17 Synthesizer. The VCO is capable of being tuned from 500 MHz to 1000 MHz.The tu

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-122RF Path Block Description for Option 501, 502, 503, 504OverviewThe RF Path for sig

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-123A13 Output (Option 501, 502, 503, 504 or Option UNJ)or A13 Output (Option UNB) Th

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-124may be applied to the baseband I and Q signals. The user may also perform a front

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-125Analog ModulationBlock Description for All OptionsOverviewAnalog modulation for al

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-126A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ)or A10 I/Q Multiplexe

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-127A18 Reference (Option 501, 502, 503, 504)or A18 Reference (Option 501, 502, 503, 5

TroubleshootingBefore Troubleshooting1-2Before TroubleshootingWARNING These troubleshooting instructions are for use by qualified personal only. To av

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-128Digital Modulation Block Description for All OptionsOverviewDigital modulation for

TroubleshootingBlock Descriptions for Option 501, 502, 503, 5041-129panel where these signals can then be used to modulate external equipment. Both in

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-130Block Descriptions for Option UNJ and Option 506This section contains block descri

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-131Overall Block Description for Option UNJ and Option 506OverviewThe objective of th

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-132Front Panel Hardkeys, Softkeys, and KeypadSome front panel keys are referred to as

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-133Frequency ControlFrequency accuracy and stability are established with the A18 Ref

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-134which baseband signal to use and route the signal in the same manner as the extern

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-135Frequency Synthesis Block Description for Option UNJ and Option 506OverviewFrequen

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-136The 1 GHz STW is split with one leg being divided down to 10 MHz. This signal is t

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-137back to the A15 Sampler. The other portion of the YO signal is routed through the

TroubleshootingGetting Started with Troubleshooting1-3Getting Started with TroubleshootingDetermine the starting point in Table 1-1 to begin troublesh

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-138RF Path Block Description for Option UNJ or Option 506OverviewThe RF Path for sign

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-139A16 Frac-N (Option UNJ or Option 506)The A16 Frac-N is part of the Frequency Synth

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-140pin diodes are biased off and on thus providing maximum or minimum attenuation. Th

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-141The RPP circuitry prevents instrument damage when power is mistakenly applied to t

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-142Analog ModulationBlock Description for All OptionsOverviewAnalog modulation for al

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-143A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ)or A10 I/Q Multiplexe

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-144A18 Reference (Option 501, 502, 503, 504)or A18 Reference (Option 501, 502, 503, 5

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-145Digital Modulation Block Description for All OptionsOverviewDigital modulation for

TroubleshootingBlock Descriptions for Option UNJ and Option 5061-146panel where these signals can then be used to modulate external equipment. Both in

FM ScalingA17 SynthesizerReference / Synthesis Loop DividerDoublerFilterblk_01 Overall Block Diagram for Option 501, 502, 503, 504VCOA18 Reference 1

TroubleshootingGetting Started with Troubleshooting1-4ILT-1 Power Supply Failure and Self-TestWhen the signal generator appears to be dead (no display

LEXTERNAL_OVERRIDE1 GHz STW/100+SamplerPulseGeneratorXTALLINEMUXINGLOGIC+10 MHzDetectorLTIMEBASEDACDAC_ADDRFine and CoarseTune DACReferenceDivider (/2

AT1ElectronicAttenuator5/10/40/20/40AT1High-PowerMechanicalAttenuatorGainAdj.250 MHzto 4 GHzPrelevel Detector Bypass0o90oBurst/ScanModALCModExt Q ModE

10 MHz InReferenceDivider (/2)FMIN BandOFFSETDACHSIG_DEL_FMFM_INV_HFMIN BandDACFM InABUS_FM500 - 1000 MHz VCOVCO_TUNEVCO_FMk*(dV/dt)k*VL_FML_10MHz_PML

EXT I InQ EXT OUT4 GHz Modulator - IQTo A13 Output 600ABUS4 GHz Mod Offset Sense - IQFrom A13 OutputPATH 1PATH 2Ext InIQOffsetDACsCALOnLatchZ600SelLat

FM DriverA21 YTO DriverA16 Frac-N (Fine Tune)A13 OutputA15 Sampler (Coarse Tune)Reference / Synthesis Loop500-1000 MHzSampler/YO Loop Phase-Locked Loo

LEXTERNAL_OVERRIDE1 GHz STW/100+SamplerPulseGeneratorXTALLINEMUXINGLOGIC+10 MHzDetectorLTIMEBASEDACDAC_ADDRFine and CoarseTune DAC1GHZ_VCO_ON/OFFUnloc

Frequency Synthesis Block Diagram for Option UNJ and Option 506 (Page 2 of 2)blk_081/41 GHz RF250 MHz LO750 MHz750 MHz A750 MHz B750 MHz C1/2 1/PFM_MO

YIG+5 dB @10 MHz0, 12, 24,36 dB0 to -2.2 dB@ 10 MHzVernier6 dB Range0 to 66by 6 dB230800k1 k4k2302kMulti ModulusDivider¸2 / 4 / 8 / 16FMCoilMainCoilGa

GainAdj.7 GHZLPFPrelevel Drive0o90oBurst/ScanModALCModExt Q ModExt I ModOffset Sense IOffset Sense QGainAdjustDACALC ModDriver BiasGain DACBurstModOff

10 MHz InReferenceDivider (/2)FMIN BandOFFSETDACHSIG_DEL_FMFM_INV_HFMIN BandDACFM InABUS_FM500 - 1000 MHz VCOVCO_TUNEVCO_FMk*(dV/dt)k*VL_FML_10MHz_PML

TroubleshootingGetting Started with Troubleshooting1-5ILT-2 A12 CPU Power-On TestA12 CPU Power-On TestAt power-on, the A12 CPU is designed to complete

EXT I InQ EXT OUT4 GHz Modulator - IQTo A13 Output 600ABUS4 GHz Mod Offset Sense - IQFrom A13 OutputPATH 1PATH 2Ext InIQOffsetDACsCALOnLatchZ600SelLat

2-12 Assembly Replacement

Assembly ReplacementBefore You Replace an Assembly2-2Before You Replace an AssemblyCAUTION Many of the assemblies in this instrument are very suscepti

Assembly ReplacementAssemblies That You Can Replace2-3Assemblies That You Can Replace• “Outer and Inner Instrument Covers” on page 2-4• “Front Panel”

Assembly ReplacementOuter and Inner Instrument Covers2-4Outer and Inner Instrument CoversTools Required • T-10 driver • T-15 driver• T-20 driver Remov

Assembly ReplacementOuter and Inner Instrument Covers2-5Figure 2-1 Outer and Inner Instrument Cover Removal

Assembly ReplacementFront Panel2-6Front PanelTools Required • T-15 driver • long-nose pliersRemoval ProcedureRefer to Figure 2-2 and Figure 2-3 for th

Assembly ReplacementFront Panel2-7Replacement Procedure 1. Reverse the order of the removal procedure.2. Perform the post-repair adjustments and perfo

Assembly ReplacementA1 Keyboard2-8A1 Keyboard Tools Required • T-10 driver Removal Procedure Refer to Figure 2-4 for this procedure. 1. Disconnect the

Assembly ReplacementA1 Keyboard2-9Figure 2-4 A1 Keyboard

TroubleshootingGetting Started with Troubleshooting1-6Figure 1-1 LEDs DS18 through DS25 of the A12 CPUTable 1-3Power Supply Voltage (Vdc)Connector Pin

Assembly ReplacementA2 Display2-10A2 Display Tools Required • T-10 driver Removal Procedure Refer to Figure 2-5 for this procedure.1. Disconnect the p

Assembly ReplacementA2 Display2-11Figure 2-5 A2 Display

Assembly ReplacementA2DS1 Display Backlight2-12A2DS1 Display BacklightTools Required • T-10 driver • small phillips screw driverRemoval Procedure Refe

Assembly ReplacementA2DS1 Display Backlight2-13Figure 2-6 A2DS1 Backlight

Assembly ReplacementA3 Front Panel Auxilary Board2-14A3 Front Panel Auxilary BoardTools Required • T-10 driver WARNING High voltage is present at the

Assembly ReplacementA3 Front Panel Auxilary Board2-15Figure 2-7 A3 Front Panel Auxilary Board

Assembly ReplacementA4 Inverter2-16A4 Inverter Tools Required • T-10 driverWARNING High voltage is present at the A4 Inverter output (CN2-1). Also, be

Assembly ReplacementA4 Inverter2-17Figure 2-8 A4 Inverter

Assembly ReplacementA5 10 GB Hard Drive (Option 005)2-18A5 10 GB Hard Drive (Option 005)Tools Required • T-10 driver Removal Procedure Refer to Figure

Assembly ReplacementA5 10 GB Hard Drive (Option 005)2-19Figure 2-9 A5 10 GB Hard Drive (Option 005)

TroubleshootingGetting Started with Troubleshooting1-7Verifying the A12 CPU Power-On Sequence1. Before verifying the power-on sequence, ensure that al

Assembly ReplacementA6 Power Supply2-20A6 Power SupplyTools Required • T-10 driver Removal Procedure Refer to Figure 2-10 for this procedure.1. Discon

Assembly ReplacementA6 Power Supply2-21Figure 2-10 A6 Power Supply

Assembly ReplacementA7 Baseband Generator (Option 001 or Option 002)2-22A7 Baseband Generator (Option 001 or Option 002)Tools Required • needle-nose p

Assembly ReplacementA7 Baseband Generator (Option 001 or Option 002)2-23Figure 2-11 A7 Baseband Generator (Option 001 or Option 002)

Assembly ReplacementA9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300)2-24A9 Digital Demodulator (Option 501, 502, 503, 504 with Optio

Assembly ReplacementA9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300)2-25Figure 2-12 A9 Digital Demodulator (Option 501, 502, 503, 50

Assembly ReplacementA10 I/Q Multiplexer2-26A10 I/Q MultiplexerNOTE This procedure applies to the A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Opt

Assembly ReplacementA10 I/Q Multiplexer2-27Replacement Procedure 1. Reverse the order of the removal procedure.2. Perform the post-repair adjustments

Assembly ReplacementA11 Internal Bit Error Rate Analyzer (Option UN7)2-28A11 Internal Bit Error Rate Analyzer (Option UN7)Tools Required • needle-nose

Assembly ReplacementA11 Internal Bit Error Rate Analyzer (Option UN7)2-298. Lift out the A11 Internal Bit Error Rate Analyzer (Option UN7).Replacement

iiNoticeThe material contained in this document is provided “as is”, and is subject to being changed, without notice, in future editions.Further, to t

TroubleshootingGetting Started with Troubleshooting1-8No LAN ActivityThe signal generator supports 10-Base T-LAN. When the instrument is connected to

Assembly ReplacementA12 CPU2-30A12 CPUTools Required •noneRemoval ProcedureRefer to Figure 2-15 for this procedure and to the connector/cable diagram

Assembly ReplacementA12 CPU2-319. Lift out the A12 CPU.Replacement Procedure 1. Reverse the order of the removal procedure.2. Perform the post-repair

Assembly ReplacementA13 Output2-32A13 Output NOTE This procedure applies to both the A13 Output (Option 501, 502, 503, 504 or Option UNJ)and the A13 O

Assembly ReplacementA13 Output2-33Figure 2-16 A13 Output

Assembly ReplacementA14 Extended Frequency Output (Option 506)2-34A14 Extended Frequency Output (Option 506) Tools Required •noneRemoval ProcedureRefe

Assembly ReplacementA14 Extended Frequency Output (Option 506)2-35Figure 2-17 A14 Extended Frequency Output (Option 506)

Assembly ReplacementA15 Sampler (Option UNJ or Option 506)2-36A15 Sampler (Option UNJ or Option 506)Tools Required •noneRemoval ProcedureRefer to Figu

Assembly ReplacementA15 Sampler (Option UNJ or Option 506)2-37Figure 2-18 A15 Sampler (Option UNJ or Option 506)

Assembly ReplacementA16 Frac-N (Option UNJ or Option 506)2-38A16 Frac-N (Option UNJ or Option 506) Tools Required •noneRemoval ProcedureRefer to Figur

Assembly ReplacementA16 Frac-N (Option UNJ or Option 506)2-39Figure 2-19 A16 Frac-N (Option UNJ or Option 506)

TroubleshootingGetting Started with Troubleshooting1-9ILT3 Front Panel Display TroubleshootingThe Front Panel Display consists of the following four a

Assembly ReplacementA17 Synthesizer (Option 501, 502, 503, 504)2-40A17 Synthesizer (Option 501, 502, 503, 504)Tools Required •noneRemoval ProcedureRef

Assembly ReplacementA17 Synthesizer (Option 501, 502, 503, 504)2-41Figure 2-20 A17 Synthesizer (Option 501, 502, 503, 504)

Assembly ReplacementA18 Reference2-42A18 ReferenceNOTE This procedure applies to the A18 Reference (Option 501, 502, 503, 504),A18 Reference (Option 5

Assembly ReplacementA18 Reference2-43Figure 2-21 A18 Reference

Assembly ReplacementA19 Daughterboard2-44A19 DaughterboardTools Required • T-10 driver Removal ProcedureRefer to Figure 2-22 for this procedure and to

Assembly ReplacementA19 Daughterboard2-45Figure 2-22 A19 Daughterboard

Assembly ReplacementA19 Daughterboard Cable Removal2-46A19 Daughterboard Cable RemovalTools Required • external retaining ring pliersRemoval Procedure

Assembly ReplacementA19 Daughterboard Cable Removal2-47Figure 2-23 A19 Daughterboard Cable Removal

Assembly ReplacementA20 Downconverter (Option 501, 502, 503, 504 with Option 300)2-48A20 Downconverter (Option 501, 502, 503, 504 with Option 300)Tool

Assembly ReplacementA20 Downconverter (Option 501, 502, 503, 504 with Option 300)2-49Figure 2-24 A20 Downconverter (Option 501, 502, 503, 504 with Op

TroubleshootingGetting Started with Troubleshooting1-10Symptom: If the Display is DarkThe control lines for the A4 Inverter are routed from the A12 CP

Assembly ReplacementA21 YTO Driver (Option UNJ or Option 506) and A22 Coupler (Option 506)2-50A21 YTO Driver (Option UNJ or Option 506)and A22 Coupler

Assembly ReplacementA21 YTO Driver (Option UNJ or Option 506) and A22 Coupler (Option 506)2-51Replacement Procedure NOTE Make sure that the tabs on th

Assembly ReplacementA23 Motherboard2-52A23 MotherboardTools Required • T-10 driver • 5/8” open-ended wrench• 3/16” nut driver• 9/32” nut driver • need

Assembly ReplacementA23 Motherboard2-53Replacement Procedure 1. Reverse the order of the removal procedure.2. Torque all T-10 screws to 9 in-lbs.3. To

Assembly ReplacementA23 Motherboard2-54Figure 2-26 A23 Motherboard

Assembly ReplacementA23BT1 Battery2-55A23BT1 BatteryTools Required •noneRemoval ProcedureRefer to Figure 2-27 for this procedure.1. Disconnect the pow

Assembly ReplacementA24 Line Module2-56A24 Line ModuleTools Required • T-10 driverRemoval ProcedureRefer to Figure 2-28 for this procedure.1. Disconne

Assembly ReplacementRear Panel2-57Rear PanelTools Required • T-10 driver • 5/8” hex-nut driver• 9/32” nut driver• 3/16” nut driver• needle-nose pliers

Assembly ReplacementRear Panel2-58Figure 2-29 Rear Panel

Assembly ReplacementA25 Rear Panel Board2-59A25 Rear Panel BoardTools Required • T-10 driver • 3/16” hex-nut driver• 9/16” open-ended wrench• 5 mm nut

TroubleshootingGetting Started with Troubleshooting1-11❏ Check that there is approximately 290 Vac, 40 kHz signal at CN2-1. (This check should be made

Assembly ReplacementA25 Rear Panel Board2-60Figure 2-30 A25 Rear Panel Board

Assembly ReplacementA26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM)2-61A26 Rear Panel LVDS Board (Option 1EM)and A27

Assembly ReplacementA26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM)2-62Figure 2-31 A26 Rear Panel LVDS Board (Option

Assembly ReplacementAT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 orOption UNJ)2-63AT

Assembly ReplacementAT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ)2-64R

Assembly ReplacementAT1 High-Power Mechanical Attenuator (Option UNB)2-65AT1 High-Power Mechanical Attenuator (Option UNB)NOTE On signal generators eq

Assembly ReplacementAT1 High-Power Mechanical Attenuator (Option UNB)2-663. Torque all RF connectors to 8 in-lbs.4. Perform the post-repair adjustment

Assembly ReplacementAT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)2-67AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Opt

Assembly ReplacementAT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)2-68Figure 2-34 AT1 Electronic Attenuator (Option 501, 502, 503

Assembly ReplacementA29 DC Blocking Capacitor (Option 506)2-69A29 DC Blocking Capacitor (Option 506)Tools Required • 5/16” open ended wrenchRemoval Pr

TroubleshootingGetting Started with Troubleshooting1-12Symptom: If the Display is Bright, but without Characters❏ Check that the signal generator is p

Assembly ReplacementA29 DC Blocking Capacitor (Option 506)2-70Figure 2-35 A29 DC Blocking Capacitor (Option 506)Figure 2-36 A29 DC Blocking Capacitor

Assembly ReplacementB1 Power Supply Fan2-71B1 Power Supply FanTools Required • T-10 driverRemoval ProcedureRefer to Figure 2-37 for this procedure.1.

Assembly ReplacementB1 Power Supply Fan2-72Figure 2-37 B1 Power Supply Fan

Assembly ReplacementB2 Small Fan2-73B2 Small FanTools Required • T-10 driverRemoval ProcedureRefer to Figure 2-38 for this procedure.1. Disconnect the

Assembly ReplacementB2 Small Fan2-74Figure 2-38 B2 Small Fan

Assembly ReplacementB3 Daughterboard/Card Cage Fan2-75B3 Daughterboard/Card Cage FanTools Required • T-10 driverRemoval ProcedureRefer to Figure 2-39

Assembly ReplacementB3 Daughterboard/Card Cage Fan2-76Figure 2-39 B3 Daughterboard/Card Cage Fan

Assembly ReplacementRF Output Connector2-77RF Output ConnectorTools Required • 5/16” open ended wrench• 9/16” open ended wrench• T-10 driverRemoval Pr

Assembly ReplacementRF Output Connector2-785. Using the T-10 driver, remove the two screws (1) that hold the RF Output Connector and bracket to the ch

Assembly ReplacementRF Output Connector2-79Figure 2-41 RF Output Connector for Option 1EM

TroubleshootingGetting Started with Troubleshooting1-13Figure 1-4 Pulsing Activity LCD_DATAJ1-8 to 15,J30-13, 14, 17, 18, 23, 24, 27, 28,J15-24, 25, 2

Assembly ReplacementRF Output Connector2-80

3-13 Replaceable Parts

Replaceable PartsOrdering Information3-2Ordering InformationTo order a part, do the following:1. Determine the part number.2. Determine the quantity r

Replaceable PartsSave Money with Rebuilt-Exchange Assemblies3-3Save Money with Rebuilt-Exchange AssembliesUnder the rebuilt-exchange assembly program,

Replaceable PartsShipping a Defective Assembly Back to Agilent Technologies3-4Shipping a Defective Assembly Back to Agilent Technologies1. When you re

Replaceable PartsFrequency, Hardware, and Personality Options3-5Frequency, Hardware, and Personality OptionsThis section lists the options available w

Replaceable PartsAssemblies and Hardware Options3-6Assemblies and Hardware OptionsAssemblyOption 501, 502, 503, 504andOption 300Option UNJ Option 506A

Replaceable PartsAssemblies and Hardware Options3-7Side-SLOT 5A18 Reference (Option 501, 502, 503, 504) page 3-12E4400-60512 N/A N/Aor A18 Reference (

Replaceable PartsAssemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-8Assemblies from a Top View(Option 501

Replaceable PartsAssemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-9Figure 3-2 Assemblies from a Top View

TroubleshootingGetting Started with Troubleshooting1-14Figure 1-7 Pulsing ActivityJ1-1, J30-7, J15-93— If the signals in Table 1-7 are correct, replac

Replaceable PartsAssemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-10Figure 3-3 Assemblies from a Top Vie

Replaceable PartsAssemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-11Figure 3-4 Assemblies from a Top Vie

Replaceable PartsAssemblies from a Right-Side View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-12Assemblies from a Right-Side

Replaceable PartsAssemblies from a Right-Side View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-13Figure 3-5 Assemblies from a

Replaceable PartsAssemblies of the Front Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-14Assemblies of the Front Panel(Opt

Replaceable PartsAssemblies of the Inside Rear Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, Option 506, or Option 1EM)3-15Assemblies of t

Replaceable PartsA23BT1 Battery (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)3-16A23BT1 Battery(Option 501, 502, 503, 504, Option

Replaceable PartsCables3-17CablesThis section lists part numbers for the cables in your signal generator.• “Cables for the Inside Front Panel and Fans

Replaceable PartsCables3-18• Option 506 Cables— “Option 506 - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002)” on page 3-55—

Replaceable PartsCables for the Inside Front Panel and Fans (B1, B2, and B3)3-19Cables for the Inside Front Panel and Fans (B1, B2, and B3)Table 3-4Re

TroubleshootingGetting Started with Troubleshooting1-15Symptom: If Hardkeys or Softkeys are Not FunctioningThe A1 Keyboard contains the switches for t

Replaceable PartsCables for the Inside Front Panel and Fans (B1, B2, and B3)3-20Figure 3-9 Cables for the Inside Front Panel and Fans (B1, B2, and B3)

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-21Cables for Option 501, 502, 503, 504 Signal GeneratorsOption 501, 502, 503,

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-22W18 flexible cable, J11 of A10 I/Q Multiplexer (Option 501, 502, 503, 504 o

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-23Figure 3-10 Option 501, 502, 503, 504 - Overall Cables(also includes cables

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-24Option 501, 502, 503, 504 - Front Panel CablesTable 3-6Reference Designator

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-25Figure 3-11 Option 501, 502, 503, 504 - Front Panel Cables

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-26Option 501, 502, 503, 504 - Standard Cables(does not include cables for the

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-27Figure 3-12 Option 501, 502, 503, 504 - Standard Cables(does not include ca

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-28Option 501, 502, 503, 504 - Only Option UN7, 300, 005, and 001 or 002 Cable

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-29Figure 3-13 Option 501, 502, 503, 504 - Only Option UN7, 300, 005, and 001

TroubleshootingGetting Started with Troubleshooting1-16Figure 1-9 J15 of the A23 MotherboardTable 1-9 A1 Keyboard Control Lines (KEYCOLx and KEYROWy)K

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-30Option 501, 502, 503, 504 - Semi-Rigid Cablesincludes the AT1 Electronic At

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-31Figure 3-14 Option 501, 502, 503, 504 - Semi-Rigid Cablesincludes the AT1 E

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-32Option 501, 502, 503, 504 - Option 1EM Overall Cables(also includes cables

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-33W64(Option 300)flexible cable, A20 Downconverter (Option 501, 502, 503, 504

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-34Figure 3-15 Option 501, 502, 503, 504 - Option 1EM Overall Cables(also incl

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-35Option 501, 502, 503, 504 - Option 1EM Semi-Rigid Cablesincludes the AT1 El

Replaceable PartsCables for Option 501, 502, 503, 504 Signal Generators3-36Figure 3-16 Option 501, 502, 503, 504 - Option 1EM Semi-Rigid Cablesinclude

Replaceable PartsCables for Option UNJ Signal Generators3-37Cables for Option UNJ Signal GeneratorsOption UNJ - Overall Cables(also includes cables fo

Replaceable PartsCables for Option UNJ Signal Generators3-38W19 flexible cable, J10 of A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ)to

Replaceable PartsCables for Option UNJ Signal Generators3-39Figure 3-17 Option UNJ - Overall Cables(also includes cables for Option UN7, 005, and 001

TroubleshootingGetting Started with Troubleshooting1-17Symptom: If the RPG Knob is Not FunctioningWhen the RPG Knob is functioning properly, DS11 on t

Replaceable PartsCables for Option UNJ Signal Generators3-40Option UNJ - Front Panel CablesTable 3-13Reference DesignatorDescription Part NumberW1 fle

Replaceable PartsCables for Option UNJ Signal Generators3-41Figure 3-18 Option UNJ - Front Panel Cables

Replaceable PartsCables for Option UNJ Signal Generators3-42Option UNJ - Standard Cables(does not include cables for the front panel, Option UN7, or O

Replaceable PartsCables for Option UNJ Signal Generators3-43Figure 3-19 Option UNJ - Standard Cables(does not include cables for the front panel, Opti

Replaceable PartsCables for Option UNJ Signal Generators3-44Option UNJ - Only Option UN7, 005, and 001 or 002 CablesTable 3-15Reference DesignatorDesc

Replaceable PartsCables for Option UNJ Signal Generators3-45Figure 3-20 Option UNJ - Only Option UN7, 005, and 001 or 002 Cables

Replaceable PartsCables for Option UNJ Signal Generators3-46Option UNJ - Semi-Rigid Cablesincludes the A21 YTO Driver (Option UNJ or Option 506)and th

Replaceable PartsCables for Option UNJ Signal Generators3-47When using the AT1 High-Power Mechanical Attenuator (Option UNB)with the A28 Reverse Power

Replaceable PartsCables for Option UNJ Signal Generators3-48Figure 3-21 Option UNJ - Semi-Rigid Cablesincludes the A21 YTO Driver (Option UNJ or Optio

Replaceable PartsCables for Option UNJ Signal Generators3-49Option UNJ - Option 1EM Overall Cables(also includes cables for Option UN7, 005, and 001 o

Contents iii1. TroubleshootingBefore Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TroubleshootingGetting Started with Troubleshooting1-18Symptom: If the Screen Saver is Not FunctioningThe screen saver delay may be set for any intege

Replaceable PartsCables for Option UNJ Signal Generators3-50W43 semi-rigid cable, output of A13 Output (Option 501, 502, 503, 504 or Option UNJ)to inp

Replaceable PartsCables for Option UNJ Signal Generators3-51Figure 3-22 Option UNJ - Option 1EM Overall Cables(also includes cables for Option UN7, 00

Replaceable PartsCables for Option UNJ Signal Generators3-52Option UNJ - Option 1EM Semi-Rigid Cablesincludes the A21 YTO Driver (Option UNJ or Option

Replaceable PartsCables for Option UNJ Signal Generators3-53When using the AT1 High-Power Mechanical Attenuator (Option UNB)with the A28 Reverse Power

Replaceable PartsCables for Option UNJ Signal Generators3-54Figure 3-23 Option UNJ - Option 1EM Semi-Rigid Cablesincludes the A21 YTO Driver (Option U

Replaceable PartsCables for Option 506 Signal Generators3-55Cables for Option 506 Signal GeneratorsOption 506 - Overall Cables(also includes cables fo

Replaceable PartsCables for Option 506 Signal Generators3-56W24(Option UN7)flexible cable, J5 of A11 Internal Bit Error Rate Analyzer (Option UN7)to B

Replaceable PartsCables for Option 506 Signal Generators3-57Figure 3-24 Option 506 - Overall Cables(also includes cables for Option UN7, 005, and 001

Replaceable PartsCables for Option 506 Signal Generators3-58Option 506 - Front Panel CablesTable 3-20Reference DesignatorDescription Part NumberW1 fle

Replaceable PartsCables for Option 506 Signal Generators3-59Figure 3-25 Option 506 - Front Panel Cables

TroubleshootingSelf-Test Failures and Related Troubleshooting1-19Self-Test Failures and Related TroubleshootingOverviewThe philosophy behind self-test

Replaceable PartsCables for Option 506 Signal Generators3-60Option 506 - Standard Cables(does not include cables for the front panel, Option UN7, or O

Replaceable PartsCables for Option 506 Signal Generators3-61W58 semi-rigid cable, output of A13 Output (Option UNB)to input of the A14 Extended Freque

Replaceable PartsCables for Option 506 Signal Generators3-62Figure 3-26 Option 506 - Standard Cables(does not include cables for the front panel, Opti

Replaceable PartsCables for Option 506 Signal Generators3-63Option 506 - Only Option UN7, 005, and 001 or 002 CablesTable 3-22Reference DesignatorDesc

Replaceable PartsCables for Option 506 Signal Generators3-64Figure 3-27 Option 506 - Only Option UN7, 005, and 001 or 002 Cables

Replaceable PartsCables for Option 506 Signal Generators3-65Option 506 - Semi-Rigid Cablesincludes the A21 YTO Driver (Option UNJ or Option 506)and th

Replaceable PartsCables for Option 506 Signal Generators3-66Figure 3-28 Option 506 - Semi-Rigid Cablesincludes the A21 YTO Driver (Option UNJ or Optio

Replaceable PartsCables for Option 506 Signal Generators3-67Option 506 - Option 1EM Overall Cables(also includes cables for Option UN7, 005, and 001 o

Replaceable PartsCables for Option 506 Signal Generators3-68W72(Option 1EM)flexible cable, I IN from the rear panelto J7 of A10 I/Q Multiplexer8121-06

Replaceable PartsCables for Option 506 Signal Generators3-69Figure 3-29 Option 506 - Option 1EM Overall Cables(also includes cables for Option UN7, 00

TroubleshootingSelf-Test Failures and Related Troubleshooting1-20To Run Self-Test1. Press the Utility key.2. Press the Instrument Info/Help Mode softk

Replaceable PartsCables for Option 506 Signal Generators3-70Option 506 - Option 1EM Semi-Rigid Cablesincludes the A21 YTO Driver (Option UNJ or Option

Replaceable PartsCables for Option 506 Signal Generators3-71Figure 3-30 Option 506 - Option 1EM Semi-Rigid Cablesincludes the A21 YTO Driver (Option U

Replaceable PartsHardware and Other Instrument Parts3-72Hardware and Other Instrument PartsThis section lists part numbers for hardware and other inst

Replaceable PartsHardware and Other Instrument Parts3-73Hardware of the Front PanelTable 3-26 Item No. Description Qty Part Number1 menu overlay (Opt

Replaceable PartsHardware and Other Instrument Parts3-74Figure 3-31 Hardware of the Front Panel

Replaceable PartsHardware and Other Instrument Parts3-75Hardware of a Disassembled Front Panel Table 3-27 Item No. Description Qty Part Number1 front

Replaceable PartsHardware and Other Instrument Parts3-76Figure 3-32 Hardware of a Disassembled Front Panel

Replaceable PartsHardware and Other Instrument Parts3-77Hardware of the Rear-Panel(Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)Ta

Replaceable PartsHardware and Other Instrument Parts3-78Figure 3-33 Hardware of the Rear-Panel(Option 501, 502, 503, 504, Option 300, Option UNJ, or O

Replaceable PartsHardware and Other Instrument Parts3-79Hardware of the Rear-Panel (Option 1EM)Table 3-29Item No. Description Qty Part Number1rear pan

TroubleshootingSelf-Test Failures and Related Troubleshooting1-21600 Post Regulators601 DACs Test602 PLL Interface603 FM Driver“Self-Tests 6xx for the

Replaceable PartsHardware and Other Instrument Parts3-80Figure 3-34 Hardware of the Rear-Panel(Option 1EM)

Replaceable PartsHardware and Other Instrument Parts3-81Hardware of a DisassembledAT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)F

Replaceable PartsHardware and Other Instrument Parts3-82Hardware of a DisassembledAT1 High-Power Mechanical Attenuator (Option UNB)and A28 Reverse Pow

Replaceable PartsHardware and Other Instrument Parts3-83Figure 3-36 Hardware of a Disassembled AT1 High-Power Mechanical Attenuator (Option UNB) and A

Replaceable PartsHardware and Other Instrument Parts3-84Hardware of a DisassembledAT1 High-Power Mechanical Attenuator (Option UNB)on Option 506 OnlyF

Replaceable PartsHardware and Other Instrument Parts3-85Hardware of the A6 Power Supply Shield and Left-Side(Option 501, 502, 503, 504, Option 300, Op

Replaceable PartsHardware and Other Instrument Parts3-86Hardware of the A23 Motherboard and Bottom-Side(Option 501, 502, 503, 504, Option 300, Option

Replaceable PartsHardware and Other Instrument Parts3-87Hardware of the Outside Instrument Covers and Associated Parts(Option 501, 502, 503, 504, Opti

Replaceable PartsHardware and Other Instrument Parts3-88Figure 3-40 Hardware of the Outside Instrument Covers and Associated Parts(Option 501, 502, 50

Replaceable PartsHardware and Other Instrument Parts3-89Hardware of the Inside Instrument Covers and Associated Parts(Option 501, 502, 503, 504, Optio

TroubleshootingSelf-Test Failures and Related Troubleshooting1-222100 Power Supply2101 Sweep Diag2102 LCD Bias“Self-Tests 21xx for the A23 Motherboard

Replaceable PartsMiscellaneous3-90MiscellaneousThis section lists part numbers for miscellaneous items that can be used with your signal generator.Acc

Replaceable PartsAbbreviations Used in Part Descriptions3-91Abbreviations Used in Part DescriptionsThis section defines the reference designators, abb

Replaceable PartsAbbreviations Used in Part Descriptions3-92

4-14 Post-Repair Procedures

Post-Repair ProceduresPost-Repair Procedures Matrix4-2Post-Repair Procedures MatrixTable 4-1 Performance Tests for Assemblies A1 through A16Performan

Post-Repair ProceduresPost-Repair Procedures Matrix4-3Table 4-2 Performance Tests for Assemblies A1 through A16Performance TestsThe following perform

Post-Repair ProceduresPost-Repair Procedures Matrix4-4Table 4-3 Performance Tests for Assemblies A17 through A29, B1, B2, B3, andthe RF Output Connect

Post-Repair ProceduresPost-Repair Procedures Matrix4-5Table 4-4 Performance Tests for Assemblies A17 through A29, B1, B2, B3, andthe RF Output Connect

Post-Repair ProceduresPost-Repair Procedures Matrix4-6Table 4-5 Adjustments for Assemblies A1 through A16AdjustmentsThe following adjustments are lis

Post-Repair ProceduresPost-Repair Procedures Matrix4-7Table 4-6 Adjustments for Assemblies A1 through A16AdjustmentsThe following adjustments are lis

TroubleshootingTroubleshooting Assembly Level Problems1-23Troubleshooting Assembly Level ProblemsWARNING Wait 30 seconds after unplugging the instrume

Post-Repair ProceduresPost-Repair Procedures Matrix4-8Table 4-7 Adjustments for Assemblies A17 through A29, B1, B2, B3, andthe RF Output ConnectorAdju

Post-Repair ProceduresPost-Repair Procedures Matrix4-9Table 4-8 Adjustments for Assemblies A17 through A29, B1, B2, B3, andthe RF Output ConnectorAdju

Post-Repair ProceduresPost-Repair Procedures Matrix4-10

5-15 Safety and Regulatory

Safety and RegulatorySafety Notes5-2Safety NotesThe following safety notes are used throughout this manual. Familiarize yourself with each of the note

Safety and RegulatoryGeneral Safety Considerations5-3General Safety ConsiderationsThe following safety notes apply specifically to signal generators.

Safety and RegulatoryLithium Battery Disposal5-4Lithium Battery DisposalWhen the battery on the A14 CPU/Motherboard is exhausted and/or ready for disp

Safety and RegulatoryWarranty5-5WarrantyThis Agilent Technologies product is warranted against defects in material and workmanship for a period of thr

Safety and RegulatoryAssistance5-6AssistanceProduct maintenance agreements and other customer assistance agreements are available for Agilent Technolo

Safety and RegulatoryNotice5-7NoticeThe information contained in this document is subject to change without notice.Agilent Technologies makes no warra

TroubleshootingTroubleshooting Assembly Level Problems1-24Table 1-12A23 Motherboard test points for: +32 +15MB LED+12.5aba. MB LED means that an LED f

Safety and RegulatoryCertification5-8CertificationAgilent Technologies Company certifies that this product met its published specifications at the tim

IndexIndex I-1Bblock descriptionOption 501, 502, 503, 504, 1-116Option UNJ and Option 506, 1-130Ccablingfront panel, 3-21, 3-37, 3-55front panel insi

I-2 Index Index

TroubleshootingTroubleshooting Assembly Level Problems1-25Table 1-13A23 Motherboard test points for: MB LED+3.4 VDFaa. MB LED means that an LED for th

TroubleshootingTroubleshooting Assembly Level Problems1-26Table 1-14A23 Motherboard test points for:MB LED-6 VFabFiltered-6a. MB LED means that an LED

TroubleshootingTroubleshooting Assembly Level Problems1-27Table 1-15A23 Motherboard test points for:+32 VYaFiltered +32 VFa. The voltage for this powe

iv Contents508 Frac-N Loop Unlock (Option 501, 502, 503, 504) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69508 Frac-N Loop Unlock (O

TroubleshootingTroubleshooting Assembly Level Problems1-28If the Amber Standby LED is Not WorkingWith the power turned off and the signal generator pl

TroubleshootingTroubleshooting Assembly Level Problems1-29not on or the measured voltage is less than the acceptable value, one of the assemblies may

TroubleshootingTroubleshooting Assembly Level Problems1-30Self-Tests 1xx for the A10 I/Q MultiplexerNOTE These self-test errors apply to the A10 I/Q M

TroubleshootingTroubleshooting Assembly Level Problems1-31100 Power Supply• If the power supply voltages are good on the connector pins indicated:a. R

TroubleshootingTroubleshooting Assembly Level Problems1-32Self-Tests 2xx for the A15 Sampler (Option UNJ or Option 506)Figure 1-13Table 1-18Power Supp

TroubleshootingTroubleshooting Assembly Level Problems1-33200 Power Supply• If the supply voltages are good on the J10 connector pins indicated:a. Tur

TroubleshootingTroubleshooting Assembly Level Problems1-34203 YO Loop DetectorCAUTION Do not install the A13 Output with the signal generator powered

TroubleshootingTroubleshooting Assembly Level Problems1-35Self-Tests 4xx for the A13 OutputNOTE These self-test errors apply to the A13 Output (Option

TroubleshootingTroubleshooting Assembly Level Problems1-36400 Ground and PTAT Test• Using a DVM, measure the voltages on J10 (the PTAT voltage is deri

TroubleshootingTroubleshooting Assembly Level Problems1-37404 Marble Test• Measure the Q signal from the A10 I/Q Multiplexer.a. Disconnect the cable f

Contents vRF Path Block Description for Option 501, 502, 503, 504. . . . . . . . . . . . . . . . . . . . . . . . .1-122Analog ModulationBlock Descrip

TroubleshootingTroubleshooting Assembly Level Problems1-38409 ALC Modulation Test• Replace the A13 Output. 410 Burst Modulation Test• Replace the A13

TroubleshootingTroubleshooting Assembly Level Problems1-39Self-Tests 5xx for the A17 Synthesizer (Option 501, 502, 503, 504)Figure 1-15Table 1-20Power

TroubleshootingTroubleshooting Assembly Level Problems1-40500 Power Supply• If the ± 15 V and +5.2 V supplies are good on the connector pins indicated

TroubleshootingTroubleshooting Assembly Level Problems1-41503 RF Detector• If the -6 V supply is good on the connector pins indicated:a. Turn power of

TroubleshootingTroubleshooting Assembly Level Problems1-42Self-Tests 6xx for the A21 YTO Driver (Option UNJ or Option 506)Figure 1-16Table 1-21Power S

TroubleshootingTroubleshooting Assembly Level Problems1-43600 Post Regulators• If the +5.2 VD, +3.4 VDY, and ± 15 V supplies are good on the J34 conne

TroubleshootingTroubleshooting Assembly Level Problems1-44602 PLL Interface• Check for A15 Sampler (Option UNJ or Option 506) YO phase lock interferen

TroubleshootingTroubleshooting Assembly Level Problems1-45Self-Tests 7xx for the A16 Frac-N (Option UNJ or Option 506)Figure 1-17Table 1-22Power Suppl

TroubleshootingTroubleshooting Assembly Level Problems1-46700 Power Supply• If the +5.2 V, +15 V, and −15 V supplies are good on the connector pins in

TroubleshootingTroubleshooting Assembly Level Problems1-47— If the supply voltage is bad at the origin, troubleshoot the problem using that assembly&a

vi ContentsTools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-

TroubleshootingTroubleshooting Assembly Level Problems1-48— If these signals are bad, carefully remove the A16 Frac-N (Option UNJ or Option 506) with

TroubleshootingTroubleshooting Assembly Level Problems1-49706 FM Path Test• Measure the FM modulation signal from the A18 Reference.a. Turn power off

TroubleshootingTroubleshooting Assembly Level Problems1-50Self-Tests 8xx for the A18 ReferenceNOTE These self-tests apply to the A18 Reference (Option

TroubleshootingTroubleshooting Assembly Level Problems1-51800 1 GHz Detector• Replace the A18 Reference.801 Tuning Voltage• If the supply voltages are

TroubleshootingTroubleshooting Assembly Level Problems1-52Self-Tests 11xx for the A12 CPUFigure 1-19Table 1-26Power Supply Voltage (Vdc)Connector Pins

TroubleshootingTroubleshooting Assembly Level Problems1-531100 Power Supply• Run the Self-Test to verify that the A12 CPU is receiving the following p

TroubleshootingTroubleshooting Assembly Level Problems1-54Self-Tests 14xx for the A11 Internal Bit Error Rate Analyzer (Option UN7)Figure 1-20Table 1-

TroubleshootingTroubleshooting Assembly Level Problems1-551400 Power Supply• If the supply voltages are good on the connector pins indicated:a. Turn p

TroubleshootingTroubleshooting Assembly Level Problems1-56Self-Tests 15xxfor the A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300)Fig

TroubleshootingTroubleshooting Assembly Level Problems1-571500 Power Supply• If the supply voltages are good on the connector pins indicated:a. Turn p

Contents viiReplacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24A10 I/Q

TroubleshootingTroubleshooting Assembly Level Problems1-58Self-Tests 16xx for the A7 Baseband Generator (Option 001 or Option 002)Figure 1-22Table 1-2

TroubleshootingTroubleshooting Assembly Level Problems1-591600 Host <-> BBB Comm • If the +3.4 VD, +2.6 VD, and +1.9 VD supply voltages are good

TroubleshootingTroubleshooting Assembly Level Problems1-601603 Apps2 <-> SH4 Comm • Replace the A7 Baseband Generator (Option 001 or Option 002)

TroubleshootingTroubleshooting Assembly Level Problems1-611609 IQ DAC Output Test • Replace the A7 Baseband Generator (Option 001 or Option 002).1610

TroubleshootingTroubleshooting Assembly Level Problems1-62Self-Tests 20xx for the A14 Extended Frequency Output (Option 506)Figure 1-23Table 1-30Power

TroubleshootingTroubleshooting Assembly Level Problems1-632000 Ground and PTAT Test• Using a DVM, measure the voltages on J10 (the PTAT voltage is der

TroubleshootingTroubleshooting Assembly Level Problems1-642003 VBLO Test• Replace the A14 Extended Frequency Output (Option 506).2004 Marble Test• Mea

TroubleshootingTroubleshooting Assembly Level Problems1-65— If both the I and Q signals are good, replace the A14 Extended Frequency Output (Option 50

TroubleshootingTroubleshooting Assembly Level Problems1-66Self-Tests 21xx for the A23 MotherboardFigure 1-24Table 1-31Power Supply Voltage (Vdc)Connec

TroubleshootingTroubleshooting Assembly Level Problems1-672100 Power Supply• If the supply voltages are good on the connector pins indicated, replace

viii ContentsA19 Daughterboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

TroubleshootingTroubleshooting Unlocks1-68Troubleshooting UnlocksThe phase lock loop refers to that part of the frequency generating circuit used to m

TroubleshootingTroubleshooting Unlocks1-69512 Reference UnlockedA 512 Reference Unlocked message indicates a problem with the 10 MHz reference phase-l

TroubleshootingTroubleshooting Unlocks1-70520 Sampler Unlocked (Option UNJ and Option 506)A 520 Sampler Unlocked message indicates a problem with the

TroubleshootingTroubleshooting Unlocks1-71521 YO Loop Unlocked (Option UNJ and Option 506)A 521 YO Loop Unlocked message indicates a problem with the

TroubleshootingTroubleshooting Unlocks1-72623 Demod UnlockA 623 Demod Unlock message indicates a problem with the Voltage Control Oscillator’s (VCO) p

TroubleshootingTroubleshooting Unlevels and the RF Path1-73Troubleshooting Unlevels and the RF PathDepending on the signal generator’s frequency range

TroubleshootingTroubleshooting Unlevels and the RF Path1-74Troubleshooting a Leveling ProblemNOTE Before proceeding to troubleshoot with this section,

TroubleshootingTroubleshooting Unlevels and the RF Path1-75g. Set Start Frequency to 250 kHzh. Set Stop Frequency to 1 GHzi. Set Number of Points to 5

TroubleshootingTroubleshooting Unlevels and the RF Path1-76Troubleshooting the RF PathDepending on the frequency range that an unlevel is occurring, r

TroubleshootingTroubleshooting Unlevels and the RF Path1-77Unleveled or Low Power for Frequencies ≥ 250 MHz and ≤ 4 GHzNOTE Before proceeding to troub

Contents ixA26 Rear Panel LVDS Board (Option 1EM)and A27 Rear Panel SMB Board (Option 1EM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TroubleshootingTroubleshooting Unlevels and the RF Path1-78Unleveled or Low Power for Frequencies > 4 GHz and ≤ 6 GHz (Option 506 Only)NOTE Before

TroubleshootingTroubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)1-79Troubleshooting theAT1 Electronic Attenuator

TroubleshootingTroubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)1-80NOTE Table 1-36 shows the amplitude levels a

TroubleshootingTroubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)1-81−105 +5 0 +5 +5 0 +5 +5−110 +5 +5 +5 +5 0 +5

TroubleshootingTroubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB)1-82Troubleshooting theAT1 High-Power Mechanical Attenuator (Optio

TroubleshootingTroubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB)1-83NOTE Table 1-38 shows the amplitude levels and the correspondi

TroubleshootingTroubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB)1-84−103 +5 0 0 +5 +5−108 0 +5 0 +5 +5−113 +5 +5 0 +5 +5−118 0 0 +

TroubleshootingTroubleshooting Adjustment Problems1-85Troubleshooting Adjustment ProblemsWhen an adjustment does not work or fails to resolve a proble

TroubleshootingTroubleshooting Adjustment Problems1-86External Input Peak Detector Calibration • A18 ReferenceBurst Modulator Calibration • A13 Output

TroubleshootingTroubleshooting Adjustment Problems1-87Power Level Accuracy, Low Power Calibration• AT1 High-Power Mechanical Attenuator (Option UNB)•