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Tektronix 494AP service manual O a o o o o o o o o o O o o O o o o, CalibratorOutput cALOUT

Models: 494AP 494A

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Optons - 4944/494ApServlce, Vol. 1

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Option 07 (75O Inpur)

Option 07 provides an optional 7SO input and *20 dBmV calibratorin additionto the standard50O input and +20 dBm calibrator. Also, a 300 kHz Resolution Bandwidthfilter replacesthe 100 kHz fitter. The 7SO input replacesthe €xtemal mixer capability. Table g-2 lists the changesand additionsto the standardinstru- msnt electrical characteristics. These characteristics apply to the 75o Input except for the 3@ kHz 50 o Input sensitivity.

Option 08 (Delete External Mixer Input)

Option08 deletesthe ext€malmixer capabilityThe. frequencyrangeis 10 kHzto 21 GHz.

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Characlerlstic

Input lmpedance

R€tumLoss

Table8-2

OPTION07 ALTERNATE SPECIFICATIONS

SupplementalInformaton

75(}

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5MHzto 800MHz

800MHzto 1000MHz

MaximumInputL€vel

CenterFrequencyOperatingRang€ StaticResolutionBandwidth

FrequencyResponse

5 MHzto 1000MHz

CoaxialInput

1 MHz to 5 MHz

Reference Level Range

CalibratorOutput (cALOUT)

Level

Outputlmpedance

Within 2ao/ool selected bandwidth

*2.0 dB aboutthe midpointbetween two extremes

+20 dBmV*0.5 dB at 100MHz

17 dB (1.35:1VSWR)

13 dB (1.6:1VSWR)with >10 dB attenuation

+78 dBmV, 100 Vo. maximum (dc f peak)

1 MHz to 1000MHz

300kHz resolutionfilter replacesthe standardinstrument100 kHzfilter.

Frequency response is measured with )10 dB RF attenuation.

The response figure includes the effectsof:

. inputvswr

r gainvariations

Variationsin displayflatnesscontribute about 1 dB to the responsefigure.

Typically <3 dB down from the 5 MHz r€sponse,

-68dBmVto +89 dBmV

+99 dBmVis achievablein the reducedgainmode.

100 MHz comb of markers provide amplitude calibration.

Phase locked to frequency reference.

75o nominal

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Tektronix 494AP service manual O a o o o o o o o o o O o o O o o o, CalibratorOutput cALOUT

Contents

Tektronix Page O o o o o o o o a o O o o o o o o o o Releaseof CopyrightO a a o o o O oO o o o o O a o o A a a a aO o WarrantyO o o o o A a a a A o a o o a o o A o 494A/494APServiceVot.1O o A o o A o o o o o o oO a o o o a o O o o o o o o 494A/494APservice Manuatis divided into two volumesO a CONTENTSGonr O o oO a o o o O a o o oO o a o o o O o tA a o o o a o o O o o o o oO o a o A o o o o o A o PowersupplyO o o o a o RAMVOLUME2 494A/94APServiceVot.1494A/494APServlceVol O o o oO t Preselector P3035on theVideoProcessorboard Rejection494A/494APServtceVot.1 A o O oO o o 494A/494APServlceVot Simplifiedschematicof harmonicmixerBasicblockdiagramof a -rNsynthesizer Simplifieddigital-to-analog ConverterO o a o O a oO o o Options 22 Waveguide 944/494AP Service VotSpEctFtcATloNs MtxERSCHARACTERTSTTCSO a o Do Not ServiceAloneO o o o This ManualO a o o o A o o o o Sedon 1 4g4l494Ap Servlce,VolValue. O a O o O o o oSEL WM 490E 490W Mlxer 18to 26.5to 33 to 490U 40 toWM 49OV 10to 170GHzO o A o Electricalcharacteristics O o o oO o a o o o o A o o o a Freouencyrelatedcharacteristics +tAF. x BEF + 20 + 4NHzResolution FrequencySpan/Div OverallRange MinimumSpan/Div Characteristic Performance UirementNormal Accuracyand Ldentical Resolution KHz 300 Hz 30 Hz 3Hz Typically 30 psldivision of pulse tudeFreq Freouency RelatedcharacteristicsE o o 33-s0GHz O o a eO a o s Accuracy Steps 10 dB/divLogMode DisplayDynamicRange Accuracy Accuracy Normal or Delta ModeReferenceLevel SEt With Data ENTRYpush Buttons RF Attenuatol Range Accuracy Dcto 1 GHzDecadeTransitions Delta a Mode provides differentialPerformancq Requirement 100 DBcAmplitude C oA07-100 Inputsignalcharacteristics ExternalmixerO a o e O o o a1stLO OUTPUTpower Speclfication- 494Al4g4ApService,VolJ104 ACCESSORy Pin4 Pin5 UalrbratorcAL ouTOutputsignalcharacteristics TeristicsO a o o LineCE03-15 kHzto 50 MHzpowerleads Speclfication- 494A1494APService,Vot.1Temperature Operatingand Humidity CS02-50 KHz to 400 MHz power F u l l l i m i t LeadsSrDEvtEw O o o o o o o15.05 28.85inches232x 392x 732.gmm O c o A a o o Unpackingand INITIALINSPECT6N 494A1494ApService,VotO a o o o o o a o o A o a o o o Installation- 494A/494ApServlce,Vol ConnectingpowerPowerSourceand power Requirements O o o A o o o o o o oO o o o o o o O o o o o a o O o a o o o o o oO o a o o o O o o o o o o o O c o O a o o Secton 4g4Al494ApServiceVol O o o o o o o o o o o o o o o o o o oEouipmentreouired O o o o o o o o o o o o o o o o oO o o o o o LodB/soolttffi LrlrGtr O o o o o o o o o o o o o o o o o o o oAccuracy*0.2s dB io Eouipment ReouiredPreliminarypreparation MAX 10DB/ 2ODBPerformanceCheck procedure 4g4Ll4g4ApServiceVol O o o o o o o o o o o oTrME/DrV PerformancecheckprocedureO o a o o a o o o o o o o o o o o o o o o o o o o o a SPAN/DIV O o o o a o o a o a o o oTIME/DIVAUTO TME/DV Auto VertcaldtsplayA a o o o o o o o a o o o o o a o o o o o O a o o o o oA a o o o Center FreouencyaccuracycheckpointsAutoresoln on O o a o a A a o o o o a o o o O o a o o o o o o a oCheckCenterFrequencyStabilitv VerticaldtsplayO o a o o o o o o a o o o o o a o o ResolutionbandwidthautoO a o a o a o a a TME/DVAUTOMarkerOutput SPAN/DrVTlmeMarkGenerator 50 Hz 20 msAutoresoln Reflevel O o a a o o o a o a o a a o o a o a o o o oO a o a o 10dB/DtvA a A o o o a o oA o a o o o a TimeAccuracy C.**qyegp WithinS%oftherateserecitJiO a o O o a o A o CheckResolutionBandwidth and shape FactorO a a o a o a MinnoseQlglptv to 50Hz, andVERlCnl.drdpr-ry SPAN/DV O o a o a A o o o o o o o o o o O o o o oA o o MIN RFATTENdB0 GHz Nro sMAooaetenLowLosscoAxcABLEwrrx sul courEEroid 7.4 GHz 9,4 cA o o o o o a O o a o o A oO o a a a A o a a a o a o o a O o o o Narrow Videofilter PEAK/AVERAGEPart O o a o o o A oTmeidivauto Narrowvideofilter TME/DV Auto PEAK/AVERAGEPerformanceCheckprocedure- 4g4Al4g4ApServlceVol.1 O o aTrME/DtV TestsettingsO a a Narrowvtdeofilter VerticalDisplay 21BIDIV TIME/DIV Auto15.RF attenuato. test equipment setup for 50-60 dB step O o O o aDisplay A a a o a oCentebfreouency WidevideofilterDB/Dtv O a a o o o o a o A o o o o oA o a 12s O o aO a a 103 TrrFreorange PerformanceCheck procedure- 4g4A/4g4ApServiceVolResolutionbandwidth 100 kHz Autoresoln O aCheckLO Emission -70 dBmor tess OtsplayPerformanceCheckprocedure- 4g4Al4g4ApServiceVol.1 18.Test equipmentsetuplor checklngharmonicdistortion@o@o@g@@ EXTBandwtdth 1 MHz PerformanceCheckprocedure- 4g4A/4g4ApServiceVol. lResolutton Verticaldisplay LIN Triggering INT TIME/OIVTME/DV EXT VertcalDtsplay 2 dB/DtV I3fil l t r l RrttlOptioninstruments CheckHORIZOUTPUTSignatLevelMAX Hold SpanidivDtsplay Verttcal Tmeidiv Auto PEAK/AVERAGEComb Generator Mooule TR5O2 Q15oit rilineUll OutputLevel -dBm Var dB Dot Intensity OffA o o o c GpibverificationprogramReturn 5OOOREM49XPGPIBVERIFICATION Program O o o o o o o a oReturn 5O9OINPUTT$O a o a o r 9040PRTNT10OMSGEOS 8070INPUT8100PRINT 1OO1OPRINTSELECTEDDEVICE-CLEAR...SDCA o o 16050PRTNTTALK Jtestng only 16060INPUT O c16000REM Talkonlymode 16010PAGE Onlymode FailJJLrsrEN!TALKTLF OCrnoiness ANDRENREMorEJGPIBvERlFlcArtoH Cotapr-erEo MessageGenerator O o o o o o o O o o o o o o o19300cosuB19390 19530REMFAILUREDECISION Handler 19540PRINT!SELECT a UDKSemiconductor Many Componentsused StancdischargeCan Damage ThisinstrumentPreparation Adluctment Procedure- 4g4A/4g4ApServtceVotA a o 7luSelectorswttch Adjustment Procedure- 494A/494ApServiceVol O o o o o o o o o o o o o o o o o o oRrqm O o o o o o o o o o o o o o o o o o o o o o o o oO o o o o o o o o o o o o o o TIME/DIV MNLAdJustmantProcedure- 494A/4g4ApServiceVot. .l TIME/DIVAUTO TriggeringfreerunAdiustment Procedure- 4g4Al4g4Ap ServiceVol Test equlpment setup for adiusting the D€flection AmplifierTriggering EXT Adfustment Procedure- 4g4Ll4g4ApServtceVotO o o o o o o o o o o o o o o o O o o o o o o o o o o o o o o o o o o o o o o o o o AdJustmentProcedure- 494A1494ApService VotO o o o o o o o o o o o o OuFur GarnR1033 nrorsO o o o o o o o o o o o o o o o o o o o o o Adjustnent Procedure- 4g4A/4g4ApServtceVotO a o O o o o o o o o o RPlo3s-.8 Adjust Log Amptitier=?l R1012 R102S,R1030AdrustmentProcedure 4g4Ll4g4ApServtce Vot @o.@@GPtO o a o o o o o o o a o o o a o Filrcsotocr Adjustment Procedure- 494l4g4Ap ServiceVotA o o o a o o a o o o o o o o o o o o o A a o A o O o o AdJustmentProcedure- 4g4l4g4Ap Service VotO o o o O a o o o LNorE-lO o a o o a o o a a o o o o o o o o o o o o o o O o o o o o o o aTion Bandwidth SETTTNGS2Rcsct TionbandwtdthO o a o a o a $o o3 $oO o o o a a O o o o o a o o o a o a o o oOotHi O o o o O o o o oAi kHr MIN RF Atten O a a a a o o o o a o o o o o o o o o o oO a o a o a o o o Triggering AutoAdjustment procedure 4g4Al4g4ApseMce vot O a o o O o o a oFrequencyrange OTi#iO o a R1OS4 Frequency AdrustmentProcedure- 4g4A/494ApRplo?2/h To 3.0-7.1 GHz, setAdfustrnentProcedure- 4g4A/4g4ApServtceVol Ot oA o o o AdJustnentProcedure- 494A/4g4ApServtceVot A o o o o o aSnrnasrzen @ Lt. a o o a o O a o@@r RpzoroO o o o o A o o o o AdjustOption0Z VR BandLevetino Optioninstruments OnlyRFouT OUr AdrustmentProcedure- 4g4A/4g4ApServlceVot,IO a o a o o o o o Relativesusceptibilityto Staticdischargedamage IntroductionSectfon6 494A/494ApServicc Vot.1 Maintenance- 4g4Al4g4ApServlce Vot 367-028s,00 TroubleshootingAidsMaintenance- 494A1494ApServiceVol Page Diagnostics Troubleshooting Using TheerrormessagedisplayTUNINGFAILURE- 2NDLO Powersupplyoutof Regulation Malntenance- 494A/494ApServlceVol TUNINGFAILURE- 1STLOO a o a o TPl034 GroundRefer€nce1STLO Setnngaccuracy DesiredMixerfreo Auxiliary SynthesizerO o o o o o O o o o o o a 2NDLO Controldiagnosttca Offset SET.540.672KHZ Ting Accu RacyEnabledpresshelpto Disable PHASELOCKFAILURE- 1STLOLockdisabled Press Help Enable Pressshifttoexit StrobefreqO o a o e Shift PulsestretcherMalntenance- 4S4Al4g4ApServtceVol O o a o aTracemodes Corrective Maintenance Maintenance- 494Al4g4fupService VofSelectedcomponents 1R1020A46A1Rl015 446A1Rl010 Mafntenance- 494l4g4Ap ServtceVot.1 O o o o o a o o o o o o A aSERvIcING TooLs FoRBoARDTffi3.i*,o= MouNTEDcoMPoNENTs HorAlr HepairTerminalO o o O a a Maintenance- 494A/494ApServtceVot.1 Diode Color CodeO o c a o o O o E a o o o c o o A o o a o a o o Replacingassembliesand SubassembliesO o O o o o O o c o o o o a A30A57-GPIB InterfaceLlrxER Maintenance- 494Al4g4ApServiceVot.1Sr3- ltI O o o o o o o o o o o o o o o a o o o o o Page Main PowerSupplyModule Removal EAUloNl@o @@tr\ UpJMaintenanceadjustments O o a o o o o o o o o o o O o o o o o o o o o o o o o o oO o o o o o o o o o o o o O a o o Malntenance- 494A/494ApServiceVolEouipmentrequiredforreturnlossadjustment A o o o o o o o o a o O o o o o o a o o o Mafntenance- 494A1494ApServtceVot.1O o a a o o o o O o o o o o o o o o o o a o o O o o o o o o o o o o 829lr/lHzCoaxial Band-passFitterAdjustmentO a a o a o o a a a o a o a o o o O o o o o o o oMaintenance- 494l4g4Ap ServlceVot O a o o O o o o o a o o o o o o o o o o Malntenance- 494A/4g4ApServiceVolO o o o a o o O o o o a o o 17.Corect re3ponsetor g29 MHr tlrlrd and fourth resonatorsO o o o o o o o o o o O a o oO o o o o o o o a o o Calibrated100 MHz.with +20 kHz accuLr.fry- gllpin . DoNorposinouexy op O o a o oA o o O o o Maintenance- 494A/4g4ApServtce Vot FfiffiMaintenance- 4g4Al494ApService Vot.1 O a o a o a o oA a o a o o o Mafnfenance- 4g4Ll494ApServtceVot.1O a a o o a o o A a o a o o o o o Maintenanco- 4g4A/4g4Ap ServlceVol R404OFine TuneRaneeO a a o o o a o a o o O a o aA o o FREOSPAN/DV MAX Start Spur Amplttude O o o a a o oMalntenance- 494A1494ApServtceVol Capableof measuring0 Ogmit 2 t\,tt-tzFREQSPAN/DIV MAX Autoresoln on O o o o a a oFREQSPAN/DV MAX Minrf Atten RangeFREQSPAN/DIV MAX Autoresoln Reflevel TimeidvF t HhFr $ fMalntenance- 494A/494ApServlce Vol Ll,l Malntenance- 494A/4g4ApServiceVotA o O o o o a o o a a o Jdl ttA a Maintenance- 494A/4g4ApServtceVot.1Settings O o o o aO a AddressBusTest C o o o O o o o oO o o o o a o SwtTcH Maintenance- 494A1494ApServiceVot..t0xxx U302s O o o o o a o o Troubleshootingon InstrumentbusMaintenance- 494A/494ApServtceVol Instrument Bus Test Yr iffiIADDRinstrumentbusaddresscommand Responseto ADDRquery DATAinstrumentbus data commandDATAinstrumentbus dataquery CombinedADDRcommandand DATAcommandMalntenance- 494Alttg4ApService Vol InstrumentBusRegistersDB7-DBO X x x 0 0 X x x 0 1 X x x 1 0Instrumentbusregisters DB3-DBOO a o A e Rfinput DBO DB5-DBOExtmixer DB7-O DB3-DBO O o o a aDB2 DB6 DB2 DBO VcoLSB DB2-DBOFront-PanelRegisters OFF Maintenance 4g4ful4g4ApService VolTapedatatransferprogram A o o o A o o o a o o O o o aE o FinishedO t a O o o o a oO o o O o o o a O o t O o o a a o O o a a o o o a o a o o o o a o o O o o o O o o a o o o o a o o o o o o o o A o o Rollow Secton 494A1494Ap Service,VotPr signals. Blockdiagrams Showingmore O o o o O a o o a o o o o o o o o o a o o O o o o o o Page RF Input TheRFINPUT50 connectoracceptstheinputsig RF InterfaceCircuits Diagram28Lst ConverterDiagram12 O o o o o o o o o oO o o o o o o o o o o o o O o o o o a o o o o o o a o Andpassesdtttreiueniy oroPage Tabte7-1 O o o o o o O o o o o o oTheoryof Operafon 4g4A/494ApServlce,Vot 2NDCONVERTERIF SelectionO o o a o o o o o o o o o o o 2472MHz2ND CONVERTERDiagram12O o o O o o a o o o o o o o o CAvrrYPosr+l+Precision Theory of Operaton 4g4A/4g4ApService, Vol. .lOu-Too---l ExternalCabtes2182MHz PHASELOCKED2nd LO Diagrams13 O o o o O o a o o o o O a o O a o oO a o O o O o o o O a o a o o o o o o o o a o o a o o VcoMHz 2nd Converter Diagrams15 O a O o a oO o o o o o o a o o o a o o o A o a oO o a a o o o Otr SwitchandamplifierA o a o o o o o o 829MHz2nd ConvO o a a a o o o O o o a Page O o a a o o a o o o O o a a o o o o oA o o a 110MHztF AMpLtFtERDiagram17Theory of Operation 4g4Al4g4ApService,Vol A o o o O o o o O a o 110MHzFTLTERS Diagram173rd CONVERTERDiagram17 A o o o o o oREFERENCELOCKDiagramS0 O o o O o a o O a oO o A o o o o o o a VariabfeResolution Diagrams19, 19,104Id,and BandwidthselectionA o o o o o O o o A a o o o o O o O o o BandLevetingCircuitDiagram20 GalnRequiredA o o O o LOc AMp and Detector Diagram22 Fn9 input signat.at a nominal14 dBm, is applied0316 O a o o a316 316 684O o o A a o o Theory of Operation- 4gA/494Ap Servtce,VolTheoryof Operation- 4g4ful4g4ApServtce,Vot VIDEOAMpLtFtERDiagram23Functionaldescrtption Theory of Operaton 494l4g4Ap Servlce,Vol 12. Selecdon ol display positlon on lhe log scaleVtDEo PROCESSORDAGRAM24 Theory of Operaton 4g4Al4g4ApService,Vol Ffi rffiO o Filtercomponentcombinations C3026C2016 DB2 DB3DlclTAL STORAGEDiagrams25 Sytemis desisncto opn IT,r-.,.P.,9?O o LI l Theory of Operadon- 4g4N4g4Ap Servtce,Vot.lPage O o O a o o O o o o o O o o o o o a o o o Theoryof Operafon 494A/4g4ApServlce,VolO o e O o a a A o a a o oClisplayappearsas a bright dot sweepingacross DEFLECTIONAMpLtFtERSDiagram27500 digitalstoragesweep positions. The resulting O a o o O o o Axisand RF Interface DTAGRAM28O o O o o a o o A o O o o o o o o o O a a Enables CurrentdriversTransferswitchdriver MHztF high Stateor F829 MHzlF towstateO o A o O o o o O o a o HTGH,VOLTAGESUPPLYDAGRAM29Lf BLANKMSBof the characterdatais not set,the O o o o o O o o o o o oCRT READOUTDAGRAM30 GEN RUNNTNGflip-flopunassertsR/o oFF throughoRTheory of Operatlon 4g4A/4g4Ap Service, Vol Zo-cou I lF-€ Theory of Operation- 4g4Ll4g4ApService,Vot. lO o o o o o o o o o o o o o o o o o o o o o o o o o o o OFFTME u1055-dX o o o o o X x x x x xX x o o o o o X . o o o o oO o o o o o o o o o o o o o o o o o o o o o o o o o o o o Theory of Operation- 4g4l4g4Ap Servlce,VolOe o \i oAddress of Ascii code Skip bit Blank character 58O O o o a o o o o a O o o o o o o o O o a Theory of Opera$on- 494l4g4Ap Servtce,VolA o o o a o o o o o O a o o o o o a o o SWEEPDiagram31Theory of Operaton 494A/494ApService,Vol D4 D3 D2 D1 do A o o O a O a o o o o o o o o20ssldiv 100 Triggerselectionmodes Theory of Operation- 494A/494ApService,Vol Tabte7-12O a o o a o o o a o o o o o TriggerMode Freerun Internal Ext€rnal Line TableZ-13A o a o o o o O a a o a oA o a o A a o o o o a o o o o o O o o o o O a A o o o o o o SPANATTENUATORDiagram32 A o A o o A o o o o a o oCalibrationcontrolselectioncodes Theory ol Operaton 4g4A/494ApService,Vot20k Xl K3065 x0.1 K3075 x0.01 K4072 1st LO DRTVERDiagram33O o o o a a a o o A o o a a a X0.01DB7 O o a o o o o o O a a o a O o o o o o o o o o aDB4 O o a a o o o A o Preselectordriver Diagram34A o U5031OUTPUTLINES O o a o a o a oO o a o o o o o Span Volts Span VoltsPreselector Freouencybands Theory of Opera0on- 4g4\l4g4Ap Servlce,VotTabteT-18 A o a o o o o Centerfreouencycontrol DIAGRAM35O o A a a a o O o o O o a O o o Figure Z-2S. DAC Varlance graphTheory of Operaton 494l4g4Ap Servlce,Vot O o O a o o A oRuooeour O o o a o ADDRESS70 FormatsO o a o o o a o C o a o O o o o o o o oFunctionaldescription Theory of Operation- 4g4ful4g4ApService,VotO o o O a a HARMONICMIXERDiagram36 Theory of OperaUon- 494Al4g4ApServtce,Vot.1 AUXILIARYSYNTHESZERDiagram37O a a A o o Theoryof Operation- 4g4A/494ApService,Vol O o o o o O a o o o o o a A oPage COUNTERBOARDDiagram38 Phaselocksynthesizer Diagrams39 O o o o o e O e o o o o o o o o o o oO o o a U2025OUTPUTLINES O e o o a o o o o o o o o o Page DIGITALCONTROLDiagram9 Theory of Operation- 494l4g4Ap Service,VotTheory of Operation- 4g4Ll4g4ApServlce,Vol 30. System memory mapTheoryof Operation- 494A/494ApServlce,Vol 31. UOaddr€ssspaceTheory of Operation- 4g4hl4g4ApService,Vol O o c oPage Bit A a O o O o o o o o o a oPollbits A o A a o O o a o o o o oLunr A a O o o o oFf nsrrrcrr qrs crccr O a o O a o o o o o o A a O a o o O a o O o o o O o o a o A o oO o o o o o o o a o o o o o o o o O o o o o o o o o a o o 100101 CoL 102103 Main power Supplyfurnishes all the regulatedO o o o a o O o o o o o o Theory of Operation- 4g4A/494ApServlce,VolTheory of Operaton 494A/494ApServtce,Vot O a o o o o o o o a o o o o oO o o o A o o o o o Oenanon*l 105Theory of Operation- 494l4g4Ap Servlce,Vot Theory of Operation 4g4Ll4g4ApService, Vot 106 +5 V Voltage ReferenceSupplyO o o o o O a a o a o o a a a o o o a o Determiningcomponents 107Page Swtss Opl ONsRcV/134 O a o o o o o o o o o O o o O o o o CalibratorOutput cALOUTA o o o o o o o Freouency O a o o a o o o o o o o a o o o o o o oO a o O o o o o o o o o o o o Symmetry O o o o a o o o A o A aGoesanoffi OoultnGffiA o o a o o Vtdeoimarker A o o o o a a o o o a o o o oGeneralterms Frequencyterms Gfoesary- 494l4g4Ap Service,VolO o o o o o AmplitudetermsA o a o o DigitalstoragetermsO o a o o o O a a o o a O o o o oRevisioninformation Manual Part No G556O-00 Flrst prtnilng JAN1987 RevleedO o a a o a o o o o o o a o o SENSmVTY O o o o a o12s InstrumentO o O o a o o A o a o Efr/sNO o o A o a o o O o o o o o o O o O o o o Product see llst Dale2-22-88 Chg. Ref M63911DeflectionAmplifiertestpointsandadjustments Page5 ol Productsee llstO a o o o o o o o o Instrument Manual Performance CheckprocedureO o o o o O o a A o o o O o O a a Instbument Partno ADDO o o o o O o o o a Date 5/u9o Perfrmanceheck pRocEDURE change stepr r as foltowsProduct494N4g4Ap ServiceVol O a o o o Date 6/1190 ServiceVot.1O a o o o o Product494N494ApVehticaldisplay RHILO0 Peaiaverage+i\ + \MHz 10dB 100kHz Resolution Verncal Freouency Bandwidth Display SpaivdivMHz DB Bandwidth DB Bandwidth Limits 60dB MeasuredMinnoise Verticaldisplay ResolutionbandwdithParti Narrow Videofilter TIME/DIV Auto PeaivaverageA a a PeavaveragePerformanceVerification SpecificationTercfgnix CHANcE INFoRMAnoN Check1 dB CompressionpointSpectrumAnalyzerUnder Test FREQUENCYSPAN/DIV 1 MHz RESOLUTIONBANDWTDTH1 MHzProduct SeeLlst Date11 Ref. C1-991A o a o o O c