Manuals / Tektronix / Kitchen Appliance / Water Dispenser

Tektronix 494AP service manual O o o A o a o o O o o o o o o

Models: 494AP 494A

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J. SettheSpectrumAnalyzercontrolsfor a lriggeredsweep,thenswitchthesweepoftby activating SINGLESWEEP,andensureREADOUTison.

K. Monitorlhe drains(metaltabs)of 04040or Q4030,onlhe dellectionAmplifierboard,withtestoscillo- scope.SeeFigure5-6

L.AdjustC1040for bestfrequencyresponse(noovershootor rolloff)as viewedonthetestoscilloscope.

M.Monitorthe Drains(metaltabs)of Q4020or Q4010,ontheAmplifierboard,withthetesloscilloscope.

N.AdjustC1030(Figure5-6torthebestresponse).

O.Monitorthe Drains(metaltabs)of 02090or Q1090,onthe Deflectionamplifierboard,withthelest oscilloscope.

P.AdjustC3080for bestresponse.

Q.Monitorthedrains(metaltabs)ofQ1070or Q2070,onthe Deflection/amplifierboard,withthetest oscilloscope.

R.AdjustC3060lor bestresponse.

S.DisconnectthetestoscilloscopeCheck.lhe appearanceof the letter"2" in GHZof thefrequency

readout,andif necessary,readjustC3060andC3080(verticaloutput)forthestraightesttopon theletter "2". Note:The oscilloscopeprobemayaltertheresponseandalterremovingtheoscilloscopeprobe, adjustmentwillbe necessary.

T.SettheVERTICALDTSPLAYto LlN,TIME/DIVto MNL,the REFLEVELfor100uv,withtheMANUAL SCANconlrolsetfullyclockwise.

U.AdjustC1030andC1040forthebestREFLEVELreadout(straightestlettersandnumerals)Posilion. the MANUALSCANbackandforthbetweenlhe clockwiseandcountercloskwisepositionandcontinueto adjustC1030andC1040forbestresponse.

V.AdjustR5020,R/OGAINandR5030,R/OOFFSETfor bestplacementof thereadoutcharacters(top andbottom)dependingon whetheror notthecrt hasa lull graticuleor a reducedgraticule.

Note: Setthefirsltwo rowof readoutcharacters abovethetop graticulelineandsetthe lastrowof

iust

readoutcharacters belowthebottomgraticulelineon Reducedgraticuleinslruments. iust

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Tektronix 494AP service manual O o o A o a o o O o o o o o o

Contents

Tektronix Page O o o o o o o o a o O o o o o o o o o Releaseof CopyrightO o O o o o oO a a o o o O a o o A a a a aO o o o o WarrantyO o A a a a A o a o o a o o O o 494A/494APServiceVot.1A o O a o o o a o A o o o o o o oA o o O a 494A/494APservice Manuatis divided into two volumesO o o o o o o CONTENTSGonr O o oO a o o o O a o o oO o t A a o o o a o oO o a o o o O o o o o oO o a o A o o o o o Powersupply O o o o a oA o RAMVOLUME2 494A/94APServiceVot.1O o o o O t494A/494APServlceVol Preselector P3035on theVideoProcessorboard RejectionO o o A o O o494A/494APServtceVot.1 Simplifiedschematicof harmonicmixer Basicblockdiagramof a -rNsynthesizer494A/494APServlceVot Simplifieddigital-to-analog ConverterO o o O a oO o a o 944/494AP Service Vot SpEctFtcATloNsOptions 22 Waveguide MtxERSCHARACTERTSTTCSDo Not ServiceAlone O o o oO a o This ManualO a o o o A o o o o Sedon 1 4g4l494Ap Servlce,VolSEL O a O o O o o oValue. Mlxer 18to 26.5to 33 to 490U 40 to WM 49OVWM 490E 490W 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 + 4NHzCharacteristic Performance Uirement Normal Accuracyand Ldentical ResolutionResolution FrequencySpan/Div OverallRange MinimumSpan/Div KHz 300 Hz 30 Hz 3Hz Typically 30 psldivision of pulse tudeE o o Freouency RelatedcharacteristicsFreq O a o s O o a e33-s0GHz Accuracy Steps 10 dB/divLogMode Accuracy Normal or Delta Mode ReferenceLevel SEt With Data ENTRYpush ButtonsDisplayDynamicRange Accuracy RF Attenuatol Range Accuracy Dcto 1 GHzDelta a Mode provides differential Performancq RequirementDecadeTransitions 100 DBcA07-100 C oAmplitude Inputsignalcharacteristics ExternalmixerO a o e O o o aSpeclfication- 494Al4g4ApService,Vol J104 ACCESSORy Pin4 Pin51stLO OUTPUTpower UalrbratorcAL ouTOutputsignalcharacteristics TeristicsO a o o LineSpeclfication- 494A1494APService,Vot.1 Temperature Operatingand HumidityCE03-15 kHzto 50 MHzpowerleads CS02-50 KHz to 400 MHz power F u l l l i m i t Leads15.05 28.85inches232x 392x 732.gmm O o o o o o oSrDEvtEw O c o A a o o O a o o o o o a o o A o a o o o 494A1494ApService,VotUnpackingand INITIALINSPECT6N Connectingpower PowerSourceand power RequirementsInstallation- 494A/494ApServlce,Vol 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 oO o o o 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 o o o o Accuracy*0.2s dB ioLodB/soolttffi LrlrGtr Eouipment ReouiredPreliminarypreparation MAX 10DB/ 2ODBPerformanceCheck procedure 4g4Ll4g4ApServiceVol O o o o o o o o o o o oO 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 PerformancecheckprocedureTrME/DrV O o o o a o o a o a o o o TIME/DIVAUTOSPAN/DIV TME/DV Auto VertcaldtsplayO a o o o o o A a o o oA a o o o o o o o a o o o o o a o o o o o Center FreouencyaccuracycheckpointsO o a o a A a o o o o a o o o O o a o o o o o o a o CheckCenterFrequencyStabilitvAutoresoln on VerticaldtsplayResolutionbandwidthauto O a o a o a o a aO o a o o o o o o a o o o o o a o o TME/DVAUTOSPAN/DrV TlmeMarkGeneratorMarkerOutput 50 Hz 20 msO o a a o o o a o a o a a o o a o a o o o o O a o a oAutoresoln Reflevel 10dB/DtvA o o o a o o A o a o o o aA a TimeAccuracy C.**qyegp WithinS%oftherateserecitJiCheckResolutionBandwidth and shape Factor O a a o a o aO a o O o a o A o MinnoseQlglptv to 50Hz, andVERlCnl.drdpr-ry O o a o a A o o o o o o o o o o O o o o o A o oSPAN/DV MIN RFATTENdBNro sMAooaeten LowLosscoAxcABLEwrrx sul courEEroid0 GHz 7.4 GHz 9,4 cO o a a a O o a o o A oA o o o o o a A o a a a o a o o a O o o o Narrow Videofilter PEAK/AVERAGEO o a o o o A o TmeidivautoPart Narrowvideofilter TME/DV Auto PEAK/AVERAGEPerformanceCheckprocedure- 4g4Al4g4ApServlceVol.1 O o aO a a TestsettingsTrME/DtV Vertical Display 21BIDIVNarrowvtdeofilter TIME/DIV Auto15.RF attenuato. test equipment setup for 50-60 dB step O o O o aA a a o a o CentebfreouencyDisplay WidevideofilterA o a O a a o o o o a o A o o o o oDB/Dtv O o a O a a12s 103 TrrResolutionbandwidth 100 kHz PerformanceCheck procedure- 4g4A/4g4ApServiceVolFreorange O a CheckLO Emission -70 dBmor tessAutoresoln OtsplayPerformanceCheckprocedure- 4g4Al4g4ApServiceVol.1 18.Test equipmentsetuplor checklngharmonicdistortion@o@o@g@@ EXTPerformanceCheckprocedure- 4g4A/4g4ApServiceVol. l ResoluttonBandwtdth 1 MHz Verticaldisplay LIN Triggering INT TIME/OIVDtsplay 2 dB/DtV VertcalTME/DV EXT Rrttl OptioninstrumentsI3fil l t r l CheckHORIZOUTPUTSignatLevelDtsplay SpanidivMAX Hold Verttcal Tmeidiv Auto PEAK/AVERAGEComb Generator Mooule Q15oit riline UllTR5O2 OutputLevel -dBm Var dB Dot Intensity OffA o o o c GpibverificationprogramO o o o o o o a o ReturnReturn 5OOOREM49XPGPIBVERIFICATION Program 5O9OINPUTT$O a o a o r 8070INPUT 8100PRINT9040PRTNT10OMSGEOS 1OO1OPRINTSELECTEDDEVICE-CLEAR...SDCA o o O c 16000REM Talkonlymode 16010PAGE16050PRTNTTALK Jtestng only 16060INPUT Onlymode FailANDRENREMorE JGPIBvERlFlcArtoH Cotapr-erEoJJLrsrEN!TALKTLF OCrnoiness MessageO o o o o o o O o o o o o o o 19300cosuB19390Generator 19530REMFAILUREDECISION Handler 19540PRINT!SELECT a UDKStancdischarge Can DamageSemiconductor Many Componentsused ThisinstrumentAdluctment Procedure- 4g4A/4g4ApServtceVot A a oPreparation 7luSelectorswttch Adjustment Procedure- 494A/494ApServiceVol O o o o o o o o o o o o o o o o o o oO o o o o o o o o o o o o o o o o o o o o o o o o O o o o o o o o o o o o o o oRrqm TIME/DIV MNLAdJustmantProcedure- 494A/4g4ApServiceVot. .l TIME/DIVAUTO TriggeringfreerunAdiustment Procedure- 4g4Al4g4Ap ServiceVol Test equlpment setup for adiusting the D€flection AmplifierO o o o o o o o o o o o o o o o Adfustment Procedure- 4g4Ll4g4ApServtceVotTriggering EXT AdJustmentProcedure- 494A1494ApService Vot O o o o o o o o o o o o oO o o o o o o o o o o o o o o o o o o o o o o o o o OuFur GarnR1033 nrorsO a o O o o o o o o o o Adjustnent Procedure- 4g4A/4g4ApServtceVotO o o o o o o o o o o o o o o o o o o o o o Adjust Log Amptitier =?lRPlo3s-.8 R1012 R102S,R1030AdrustmentProcedure 4g4Ll4g4ApServtce Vot @o.@@GPtO o a o o o o o o o a o o o a o A o o o a o o a o o o o o o o o o o o o Adjustment Procedure- 494l4g4Ap ServiceVotFilrcsotocr AdJustmentProcedure- 4g4l4g4Ap Service Vot O o o o O a o o oA a o A o O o o LNorE-lO o a o o a o o a a o o o o o o o o o o o o o o O o o o o o o o aSETTTNGS2 RcsctTion Bandwidth Tionbandwtdth$o o3 $o O o o o a aO o a o a o a O o o o o a o o o a o a o o oAi kHr O o o o O o o o oOotHi O a a a a o o o o a o o o o o o o o o o o O a o a o a o o oMIN RF Atten Triggering AutoAdjustment procedure 4g4Al4g4ApseMce vot O a o o O o o a oO o a OTi#iFrequencyrange AdrustmentProcedure- 4g4A/494Ap Rplo?2/hR1OS4 Frequency To 3.0-7.1 GHz, setAdfustrnentProcedure- 4g4A/4g4ApServtceVol Ot oA o o o AdJustnentProcedure- 494A/4g4ApServtceVot A o o o o o aLt. a o o a o O a o @@rSnrnasrzen @ RpzoroO o o o o A o o o o AdjustOption0Z VR BandLevetino Optioninstruments OnlyO a o a o o o o o AdrustmentProcedure- 4g4A/4g4ApServlceVot,IRFouT OUr Sectfon6 494A/494ApServicc Vot.1 IntroductionRelativesusceptibilityto Staticdischargedamage Maintenance- 4g4Al4g4ApServlce Vot Maintenance- 494A1494ApServiceVol TroubleshootingAids367-028s,00 Page Diagnostics Troubleshooting Using TheerrormessagedisplayTUNINGFAILURE- 2NDLO Powersupplyoutof Regulation TUNINGFAILURE- 1STLO O a o a oMalntenance- 494A/494ApServlceVol TPl034 GroundRefer€nceDesired Mixerfreo1STLO Setnngaccuracy Auxiliary SynthesizerO o o o o o O o o o o o a 2NDLO Controldiagnosttca Offset SET.540.672KHZ Ting Accu RacyPHASELOCKFAILURE- 1STLO Lockdisabled Press Help Enable PressshifttoexitEnabledpresshelpto Disable StrobefreqO o a o e Shift PulsestretcherTracemodes O o a o aMalntenance- 4S4Al4g4ApServtceVol Corrective Maintenance Maintenance- 494Al4g4fupService VofA46A1Rl015 446A1Rl010 1R1020Selectedcomponents O o o o o a o o o o o o A a SERvIcING TooLs FoRBoARDTffi3.i*,o= MouNTEDcoMPoNENTsMafntenance- 494l4g4Ap ServtceVot.1 HorAlr HepairTerminalO o c a o o Maintenance- 494A/494ApServtceVot.1 Diode Color CodeO o o O a a 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 InterfaceSr3- ltI Maintenance- 494Al4g4ApServiceVot.1LlrxER 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 oEouipmentrequiredforreturnlossadjustment Malntenance- 494A/494ApServiceVolO o o o o o o o o o o o o O a o o 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 829lr/lHzCoaxial Band-passFitterAdjustment O a a o a o o a a a o a o a o o oO o o o o o o o o o o O o o o o o o oMaintenance- 494l4g4Ap ServlceVot O o o o a o o Malntenance- 494A/4g4ApServiceVolO a o o O o o o o a o o o o o o o o o o O o o o a o o 17.Corect re3ponsetor g29 MHr tlrlrd and fourth resonatorsO a o o O o o o o o o o a o oO o o o o o o o o o o Calibrated100 MHz.with +20 kHz accuA o o O o o O o a o oLr.fry- gllpin . DoNorposinouexy op 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 O o o a a o o Malntenance- 494A1494ApServtceVolStart Spur Amplttude Capableof measuring0 Ogmit 2 t\,tt-tzFREQSPAN/DV MAX O o o o a a oFREQSPAN/DIV MAX Autoresoln on Range FREQSPAN/DIV MAX Autoresoln ReflevelMinrf Atten TimeidvMalntenance- 494A/494ApServlce Vol HhFr $ fF t Malntenance- 494A/4g4ApServiceVot A o O o o o a o o a a oLl,l Jdl ttMaintenance- 494A/4g4ApServtceVot.1 SettingsA a O o o o aO a O o o o o a o C o o o O o o o oAddressBusTest 0xxx U302s Maintenance- 494A1494ApServiceVot..tSwtTcH Troubleshootingon Instrumentbus Maintenance- 494A/494ApServtceVol Instrument Bus TestO o o o o a o o Yr iffiIADDRinstrumentbusaddresscommand Responseto ADDRquery DATAinstrumentbus data commandCombinedADDRcommandand DATAcommand Malntenance- 494Alttg4ApService VolDATAinstrumentbus dataquery InstrumentBusRegistersX x x 0 0 X x x 0 1 X x x 1 0 InstrumentbusregistersDB7-DBO DB3-DBOO a o A e Extmixer DBO DB5-DBORfinput DB2 O o o a aDB7-O DB3-DBO Vco LSBDB6 DB2 DBO DB2-DBOFront-PanelRegisters Tapedatatransferprogram Maintenance 4g4ful4g4ApService VolOFF O o o a E oA o o o A o o o a o 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 Pr signals. Blockdiagrams Showingmore Secton 494A1494Ap Service,VotRollow 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 InterfaceCircuits Diagram28 Lst ConverterDiagram12RF Input TheRFINPUT50 connectoracceptstheinputsig 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 O o o o o o O o o o o o o Theoryof Operafon 4g4A/494ApServlce,VotTabte7-1 2NDCONVERTERIF Selection2472MHz2ND CONVERTERDiagram12 O o o O o o a o o o o o o o oO o o a o o o o o o o o o o o CAvrrYPosr+l+Theory of Operaton 4g4A/4g4ApService, Vol. .l Ou-Too---lPrecision 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 a a o o o A o a oO o o o o o o a o o o a o o o Switchandamplifier A o a o o o o o oOtr 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 oTheory of Operation 4g4Al4g4ApService,Vol 110MHztF AMpLtFtERDiagram17A o o a 110MHzFTLTERS Diagram17 3rd CONVERTERDiagram17A o o o O o o o O a o 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 appliedO a o o a 3160316 316 684O o o A a o o Theory of Operation- 4gA/494Ap Servtce,VolFunctionaldescrtption VIDEOAMpLtFtERDiagram23Theoryof Operation- 4g4ful4g4ApServtce,Vot Theory of Operaton 494l4g4Ap Servlce,Vol 12. Selecdon ol display positlon on lhe log scaleVtDEo PROCESSORDAGRAM24 Theory of Operaton 4g4Al4g4ApService,Vol Ffi rffiO o C3026 C2016Filtercomponentcombinations 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 o500 digitalstoragesweep positions. The resulting DEFLECTIONAMpLtFtERSDiagram27Clisplayappearsas a bright dot sweepingacross O a o o O o o Axisand RF Interface DTAGRAM28Enables Currentdrivers TransferswitchdriverO o O o o a o o A o O o o o o o o o O a a MHztF high Stateor F829 MHzlF towstateO o A o O o o o O o a o HTGH,VOLTAGESUPPLYDAGRAM29O o o o o O o o o o o o CRT READOUTDAGRAM30Lf BLANKMSBof the characterdatais not set,the GEN RUNNTNGflip-flopunassertsR/o oFF throughoRTheory of Operatlon 4g4A/4g4Ap Service, Vol Theory of Operation- 4g4Ll4g4ApService,Vot. l 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 oZo-cou I lF-€ OFFTME u1055-dX x x x x x X x o o o o oX 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,VolTheory of Operaton 494A/494ApService,Vol SWEEPDiagram31A o o o a o o o o o O a o o o o o a o o 20ssldiv 100 A o o O a O a o o o o o o o oD4 D3 D2 D1 do Theory of Operation- 494A/494ApService,Vol Tabte7-12 O a o o a o o o a o o o o oTriggerselectionmodes 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 o20k Theory ol Operaton 4g4A/494ApService,VotCalibrationcontrolselectioncodes 1st LO DRTVERDiagram33 O o o o a a a o o A o o a a aXl K3065 x0.1 K3075 x0.01 K4072 X0.01DB4 O o a o o o o o O a a o a O o o o o o o o o o aDB7 A o Preselectordriver Diagram34O o a a o o o A o O o a o a o a o O o a o o o o oU5031OUTPUTLINES Span Volts Span VoltsTabteT-18 Theory of Opera0on- 4g4\l4g4Ap Servlce,VotPreselector Freouencybands O o A a a a o O o o Centerfreouencycontrol DIAGRAM35A o a o o o o O o a O o o Figure Z-2S. DAC Varlance graphRuooeour O o O a o o A oTheory of Operaton 494l4g4Ap Servlce,Vot 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 oO o o O a a Theory of Operation- 4g4ful4g4ApService,VotFunctionaldescription HARMONICMIXERDiagram36 O a a A o o AUXILIARYSYNTHESZERDiagram37Theory of OperaUon- 494Al4g4ApServtce,Vot.1 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 a O e o o o o o o o o o o oO o o o o e 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 Pollbits A a O o O o o o o o o a oBit A o A a o O o a o o o o oFf nsrrrcrr qrs crccr A a O o o o oLunr 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 102Main power Supplyfurnishes all the regulated O o o o a o O o o o o o o103 Theory of Operation- 4g4A/494ApServlce,VolO o o o A o o o o o O a o o o o o o o a o o o o oTheory of Operaton 494A/494ApServtce,Vot Theory of Operation- 494l4g4Ap Servlce,Vot 105Oenanon*l 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 RcV/134 Opl ONsSwtss 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 O a o O o o o o o o o o o o o O a o o a o o o o o o o a o o o o o o oFreouency O o o o a o o o A o A a GoesanoffiSymmetry OoultnGffiA o o a o o Generalterms A o o o o a a o o o a o o o oVtdeoimarker Gfoesary- 494l4g4Ap Service,Vol O o o o o oFrequencyterms 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 O o o o a o 12sSENSmVTY 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 O o o o o O o a Performance CheckprocedureInstrument Manual A o o o O o O a a Instbument Partno ADDO o o o o O o o o a Product494N4g4Ap ServiceVol Perfrmanceheck pRocEDURE change stepr r as foltowsDate 5/u9o O a o o o ServiceVot.1 O a o o o oDate 6/1190 Product494N494ApRHI LO0Vehticaldisplay Peaiaverage+i\ + \Resolution Verncal Freouency Bandwidth Display Spaivdiv MHz DB BandwidthMHz 10dB 100kHz DB Bandwidth Limits 60dB MeasuredResolutionbandwdith PartiMinnoise Verticaldisplay Narrow Videofilter TIME/DIV Auto PeaivaverageA a a PeavaverageSpecification Tercfgnix CHANcE INFoRMAnoNPerformanceVerification Check1 dB CompressionpointFREQUENCYSPAN/DIV 1 MHz RESOLUTIONBANDWTDTH1 MHz Product SeeLlst Date11SpectrumAnalyzerUnder Test Ref. C1-991A o a o o O c