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Tektronix 494AP service manual 101

Models: 494AP 494A

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Theoryof Operation- 494A1494ApSewice, Vot. .t

Table 7-24

FRONTPANELSWTTCHMATRTXCODE/FUNCTONTABLE

DATA

ENTRY

20 ps TIME/DIV

50 ps TIME/DIV

0.1ms TIME/DV

0.2ms TIME/DIV

0.5ms TtME/DV 1 ms TIME/DV 2 ms TME/DV 5 ms TIMEIDV 10 ms TIME/DV 20 ms TIMEIDV 50 ms TIME/DIV

0.1s TIME/DV

0.2s TIME/DIV

0.5s TIME/DIV

1 s nME/DtV

2 s TIME/OV

5 s TIME/DV

AUTO

MNL

EXT

	EXTTRIGGER	RUN/STOP	ASSIGN2
	SINGLESWP	RESET	SIGNALTRACK
	SAVEA	(Selectplotter)	2
	2 dBl		2
	2 dBl		4
	B-SAVEA	(PlotterB-A offsetentry)	4
	B-SAVEA	(PlotterB-A offsetentry)	3
	10 dB/	(Disablecorrections)	3
	10 dB/	(Disablecorrections)	7
	<Green> SHIFT	(Greenshift/	7
	<Green> SHIFT	(Greenshift/	(Greenshift cancel)
	MAXSPAN	Blueshiftcancel)
	MAXSPAN	REFLVLENTRY	kHz/-dBX
	- STEP		STEPSIZE
	FINE		STEPSIZE
	FINE	CAL	MKR * REFLVL
	INTTRIG	BASELINE	BW MODE
	FREERUN	CLIP	BW MODE
	FREERUN	STEPENTRY	PEAKFIND
	NARROW		5
	LIN	(Calfactordisplay)	5
	LIN		1
	VIEWB		1
	VIEWB	RECALL(display)	6
	WIDE	(Special	6
	WIDE	(Special	I
	ZEROSPAN	ModesMenu)	I
	ZEROSPAN	dB/Dtv	HzldB
	AUTORES	SPANiDTV	HzldB
	AUTORES		MHz/+dBX
	+ STEP		MHz/+dBX
	+ STEP		MKR1 +2
	MrNNOTSE/DISTORTONREFLEVEL		dBlHz
	HELP	UNITS	dBlHz
	HELP	(Blueshifthelp)	(Greenshift hetp)
	GRATILLUM	READOUT	A MKR
	MAX HOLD	(Displayerrors)
	PULSESTRETCHER	(Diagnosticmenu)
	MARKER	FREQSTARTSTOP	MKR STARTSTOP
	MENU	FREQSTARTSTOP	MKR STARTSTOP
	VIEWA	STOREDISP
	<Blue> SHTFT	(Blue	(Blueshift/
		shiftcancel)	(Blueshift/
	IDENT	FREQ	Greenshiftcancel)
	IDENT	FREQ
	TUNECF/MKR	MKROFF
	75f,}a

o o o o

e Option 07 onty.

7-101

Image 293

Tektronix 494AP service manual 101

Contents

Tektronix Page Releaseof Copyright O o o o o o o o a o O o o o o o o o oO o o o o O oO a a 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 O o o CONTENTSGonrO a o o o O a o o oA a o o o a o o O o tO o a o o o O o o o o oO o a o A o o o o o O o o o a o PowersupplyA o RAM494A/94APServiceVot.1 VOLUME2O t O o o o494A/494APServlceVol Preselector P3035on theVideoProcessorboard Rejection494A/494APServtceVot.1 A o O oO o o Basicblockdiagramof a -rNsynthesizer Simplifiedschematicof harmonicmixer494A/494APServlceVot Simplifieddigital-to-analog ConverterO o a o O a oO o o SpEctFtcATloNs 944/494AP Service VotOptions 22 Waveguide MtxERSCHARACTERTSTTCSO o o o Do Not ServiceAloneO a o This ManualO a o o o Sedon 1 4g4l494Ap Servlce,Vol A o o o oValue. O a O o O o o oSEL WM 49OV Mlxer 18to 26.5to 33 to 490U 40 toWM 490E 490W 10to 170GHzO o A o O o o o ElectricalcharacteristicsO o a o o o o A o o o a +tAF. x BEF + 20 + 4NHz FreouencyrelatedcharacteristicsNormal Accuracyand Ldentical Resolution Characteristic Performance UirementResolution FrequencySpan/Div OverallRange MinimumSpan/Div 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 ReferenceLevel SEt With Data ENTRYpush Buttons Accuracy Normal or Delta ModeDisplayDynamicRange Accuracy RF Attenuatol Range Accuracy Dcto 1 GHzPerformancq Requirement Delta a Mode provides differentialDecadeTransitions 100 DBcAmplitude C oA07-100 Externalmixer InputsignalcharacteristicsO o o a O a o eJ104 ACCESSORy Pin4 Pin5 Speclfication- 494Al4g4ApService,Vol1stLO OUTPUTpower UalrbratorcAL ouTTeristics OutputsignalcharacteristicsLine O a o oTemperature Operatingand Humidity Speclfication- 494A1494APService,Vot.1CE03-15 kHzto 50 MHzpowerleads 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 PowerSourceand power Requirements ConnectingpowerInstallation- 494A/494ApServlce,Vol O o o A o o o o o o oO o o o o a o O o a o o o o o o O 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 O o o o o o o o o o o o o o o o o o o Secton 4g4Al494ApServiceVolEouipmentreouired O o o o o o o o o o o o o o o o oO o o o o o Accuracy*0.2s dB io O o o o o o o o o o o o o o o o o o o oLodB/soolttffi LrlrGtr Eouipment ReouiredMAX 10DB/ 2ODB PreliminarypreparationO o o o o o o o o o o o PerformanceCheck procedure 4g4Ll4g4ApServiceVolTrME/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 TIME/DIVAUTO O o o o a o o a o a o o oSPAN/DIV TME/DV Auto VertcaldtsplayA a o o o O a o o o o oA a o o o o o o o a o o o o o a o o o o o Center FreouencyaccuracycheckpointsCheckCenterFrequencyStabilitv 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 oAutoresoln on VerticaldtsplayO a o a o a o a a ResolutionbandwidthautoO o a o o o o o o a o o o o o a o o TME/DVAUTOTlmeMarkGenerator SPAN/DrVMarkerOutput 50 Hz 20 msO a o a o O o a a o o o a o a o a a o o a o a o o o oAutoresoln Reflevel 10dB/DtvA o a o o o a A o o o a o oA a TimeAccuracy C.**qyegp WithinS%oftherateserecitJiO a a o a o a CheckResolutionBandwidth and shape FactorO a o O o a o A o MinnoseQlglptv to 50Hz, andVERlCnl.drdpr-ry A o o O o a o a A o o o o o o o o o o O o o o oSPAN/DV MIN RFATTENdBLowLosscoAxcABLEwrrx sul courEEroid Nro sMAooaeten0 GHz 7.4 GHz 9,4 cA o o o o o a O o a o o A oO o a a a Narrow Videofilter PEAK/AVERAGE A o a a a o a o o a O o o oTmeidivauto O o a o o o A oPart Narrowvideofilter TME/DV Auto PEAK/AVERAGEO o a PerformanceCheckprocedure- 4g4Al4g4ApServlceVol.1TrME/DtV TestsettingsO a a Display 21BIDIV VerticalNarrowvtdeofilter TIME/DIV AutoO o O o a 15.RF attenuato. test equipment setup for 50-60 dB stepCentebfreouency A a a o a oDisplay WidevideofilterDB/Dtv O a a o o o o a o A o o o o oA o a O a a O o a12s 103 TrrFreorange PerformanceCheck procedure- 4g4A/4g4ApServiceVolResolutionbandwidth 100 kHz CheckLO Emission -70 dBmor tess O aAutoresoln Otsplay18.Test equipmentsetuplor checklngharmonicdistortion PerformanceCheckprocedure- 4g4Al4g4ApServiceVol.1EXT @o@o@g@@Resolutton PerformanceCheckprocedure- 4g4A/4g4ApServiceVol. lBandwtdth 1 MHz Verticaldisplay LIN Triggering INT TIME/OIVTME/DV EXT VertcalDtsplay 2 dB/DtV Optioninstruments RrttlI3fil l t r l CheckHORIZOUTPUTSignatLevelMAX Hold SpanidivDtsplay Tmeidiv Auto PEAK/AVERAGE VerttcalComb Generator Mooule Ull Q15oit rilineTR5O2 OutputLevel -dBm Var dB Dot Intensity OffGpibverificationprogram A o o o cReturn O o o o o o o a oReturn 5OOOREM49XPGPIBVERIFICATION Program 5O9OINPUTT$O a o a o r 8100PRINT 8070INPUT9040PRTNT10OMSGEOS 1OO1OPRINTSELECTEDDEVICE-CLEAR...SDCA o o 16000REM Talkonlymode 16010PAGE O c16050PRTNTTALK Jtestng only 16060INPUT Onlymode FailJGPIBvERlFlcArtoH Cotapr-erEo ANDRENREMorEJJLrsrEN!TALKTLF OCrnoiness Message19300cosuB19390 O o o o o o o O o o o o o o oGenerator 19530REMFAILUREDECISION Handler 19540PRINT!SELECT a UDKCan Damage StancdischargeSemiconductor Many Componentsused ThisinstrumentA a o Adluctment Procedure- 4g4A/4g4ApServtceVotPreparation 7luSelectorswttch O o o o o o o o o o o o o o o o o o o Adjustment Procedure- 494A/494ApServiceVolO 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 MNLTIME/DIVAUTO Triggeringfreerun AdJustmantProcedure- 494A/4g4ApServiceVot. .lTest equlpment setup for adiusting the D€flection Amplifier Adiustment Procedure- 4g4Al4g4Ap ServiceVolTriggering 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 AdJustmentProcedure- 494A1494ApService VotO 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 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 =?l Adjust Log AmptitierRPlo3s-.8 R1012 R102S,R1030@o.@@GPt AdrustmentProcedure 4g4Ll4g4ApServtce VotO 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 O o o o O a o o o AdJustmentProcedure- 4g4l4g4Ap Service VotA a o A o O o o LNorE-lO o o o o o o o a O o a o o a o o a a o o o o o o o o o o o o o oRcsct SETTTNGS2Tion Bandwidth TionbandwtdthO o o o a a $o o3 $oO o a o a o 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 O a o a o a o o o O a a a a o o o o a o o o o o o o o o o oMIN RF Atten Triggering AutoO a o o O o o a o Adjustment procedure 4g4Al4g4ApseMce votFrequencyrange OTi#iO o a Rplo?2/h AdrustmentProcedure- 4g4A/494ApR1OS4 Frequency To 3.0-7.1 GHz, setOt o AdfustrnentProcedure- 4g4A/4g4ApServtceVolA o o o A o o o o o a AdJustnentProcedure- 494A/4g4ApServtceVot@@r Lt. a o o a o O a oSnrnasrzen @ RpzoroO o o o o A o o o o Optioninstruments Only AdjustOption0Z VR BandLevetinoRFouT 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 Troubleshooting Using Theerrormessagedisplay DiagnosticsTUNINGFAILURE- 2NDLO Powersupplyoutof Regulation O a o a o TUNINGFAILURE- 1STLOMalntenance- 494A/494ApServlceVol TPl034 GroundRefer€nceMixerfreo Desired1STLO Setnngaccuracy Auxiliary SynthesizerO o o o o o O o o o o o a Offset SET.540.672KHZ Ting Accu Racy 2NDLO ControldiagnosttcaLockdisabled Press Help Enable Pressshifttoexit PHASELOCKFAILURE- 1STLOEnabledpresshelpto Disable StrobefreqShift Pulsestretcher O o a o eMalntenance- 4S4Al4g4ApServtceVol O o a o aTracemodes Maintenance- 494Al4g4fupService Vof Corrective MaintenanceSelectedcomponents 1R1020A46A1Rl015 446A1Rl010 SERvIcING TooLs FoRBoARDTffi3.i*,o= MouNTEDcoMPoNENTs O o o o o a o o o o o o A aMafntenance- 494l4g4Ap ServtceVot.1 HorAlr HepairTerminalO o o O a a Maintenance- 494A/494ApServtceVot.1 Diode Color CodeO o c a o o Replacingassembliesand Subassemblies O o E a o o o c o o A o o a o a o oA30A57-GPIB Interface O o O o o o O o c o o o o aLlrxER 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 EAUloNl Main PowerSupplyModule RemovalUpJ @o @@tr\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 o MaintenanceadjustmentsO o o o o o o o o o o o o O a o o Malntenance- 494A/494ApServiceVolEouipmentrequiredforreturnlossadjustment Mafntenance- 494A1494ApServtceVot.1 A o o o o o o o o a o O o o o o o a o o oO o a a o o o o O o o o o o o o o o o o a o o O a a o a o o a a a o a o a o o o 829lr/lHzCoaxial Band-passFitterAdjustmentO o o o o o o o 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 17.Corect re3ponsetor g29 MHr tlrlrd and fourth resonators O o o o a o oO o o o o o o o a o o O a o oO o o o o o o o o o o Calibrated100 MHz.with +20 kHz accuLr.fry- gllpin . DoNorposinouexy op O o a o oA o o O o o Ffiffi Maintenance- 494A/4g4ApServtce VotO a o a o a o o Maintenance- 4g4Al494ApService Vot.1Mafnfenance- 4g4Ll494ApServtceVot.1 A a o a o o oO a a o o a o o A a o a o o o o o R404OFine TuneRanee Maintenanco- 4g4A/4g4Ap ServlceVolO a o a O a a o o o a o a o oA o o FREOSPAN/DV MAX Malntenance- 494A1494ApServtceVol O o o a a o oStart Spur Amplttude Capableof measuring0 Ogmit 2 t\,tt-tzFREQSPAN/DIV MAX Autoresoln on O o o o a a oFREQSPAN/DV MAX FREQSPAN/DIV MAX Autoresoln Reflevel RangeMinrf Atten TimeidvF t HhFr $ fMalntenance- 494A/494ApServlce Vol A o O o o o a o o a a o Malntenance- 494A/4g4ApServiceVotLl,l Jdl ttSettings Maintenance- 494A/4g4ApServtceVot.1A a 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 Maintenance- 494A/494ApServtceVol Instrument Bus Test Troubleshootingon InstrumentbusO o o o o a o o Yr iffiIResponseto ADDRquery DATAinstrumentbus data command ADDRinstrumentbusaddresscommandMalntenance- 494Alttg4ApService Vol CombinedADDRcommandand DATAcommandDATAinstrumentbus dataquery InstrumentBusRegistersInstrumentbusregisters X x x 0 0 X x x 0 1 X x x 1 0DB7-DBO DB3-DBOO a o A e Rfinput DBO DB5-DBOExtmixer DB7-O DB3-DBO O o o a aDB2 LSB VcoDB6 DB2 DBO DB2-DBOFront-PanelRegisters OFF Maintenance 4g4ful4g4ApService VolTapedatatransferprogram E o O o o aA o o o A o o o a o o FinishedO o o o a o O t aO 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 Lst ConverterDiagram12 RF InterfaceCircuits Diagram28RF Input TheRFINPUT50 connectoracceptstheinputsig O o o o o o o o o oAndpassesdtttreiueniy oro O 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 oPage Theoryof Operafon 4g4A/494ApServlce,Vot O o o o o o O o o o o o oTabte7-1 2NDCONVERTERIF SelectionO o o O o o a o o o o o o o o 2472MHz2ND CONVERTERDiagram12O o o a o o o o o o o o o o o CAvrrYPosr+l+Ou-Too---l Theory of Operaton 4g4A/4g4ApService, Vol. .lPrecision ExternalCabtesO o o o O o a o o o o O a o O a o o 2182MHz PHASELOCKED2nd LO Diagrams13O a o O o O o o o Vco O a o a o o o o o o o o a o o a o oO a O o a o MHz 2nd Converter Diagrams15O o o o o o o a o o o a o o o A o a oO o a a o o o A o a o o o o o o SwitchandamplifierOtr 829MHz2nd ConvO o a a a o o o O o o a Page O o a a o o o o o O o a a o o a o o oA o o a 110MHztF AMpLtFtERDiagram17Theory of Operation 4g4Al4g4ApService,Vol 3rd CONVERTERDiagram17 110MHzFTLTERS Diagram17A o o o O o o o O a o A o o o o o oO o o O o a o O a o REFERENCELOCKDiagramS0O o A o o o o o o a Bandwidthselection VariabfeResolution Diagrams19, 19,104Id,andA o o o o o O o o A a o o o o O o O o o GalnRequired BandLevetingCircuitDiagram20A o o O o Fn9 input signat.at a nominal14 dBm, is applied LOc AMp and Detector Diagram22316 O a o o a0316 316 684O o o Theory of Operation- 4gA/494Ap Servtce,Vol A a o oTheoryof Operation- 4g4ful4g4ApServtce,Vot VIDEOAMpLtFtERDiagram23Functionaldescrtption 12. Selecdon ol display positlon on lhe log scale Theory of Operaton 494l4g4Ap Servlce,VolVtDEo PROCESSORDAGRAM24 Ffi rffi Theory of Operaton 4g4Al4g4ApService,VolO o C2016 C3026Filtercomponentcombinations DB2 DB3Sytemis desisncto opn IT,r-.,.P.,9? DlclTAL STORAGEDiagrams25O o Theory of Operadon- 4g4N4g4Ap Servtce,Vot.l LI lPage O o O a o o O o o o o Theoryof Operafon 494A/4g4ApServlce,Vol O o o o o o a o o oO o a a A o a a o o O o eClisplayappearsas a bright dot sweepingacross DEFLECTIONAMpLtFtERSDiagram27500 digitalstoragesweep positions. The resulting Axisand RF Interface DTAGRAM28 O a o o O o oTransferswitchdriver Enables CurrentdriversO 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 towstateHTGH,VOLTAGESUPPLYDAGRAM29 O o A o O o o o O o a oCRT READOUTDAGRAM30 O o o o o O o o o o o oLf BLANKMSBof the characterdatais not set,the GEN RUNNTNGflip-flopunassertsR/o oFF throughoRTheory of Operatlon 4g4A/4g4Ap Service, Vol 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- 4g4Ll4g4ApService,Vot. lZo-cou I lF-€ OFFTME u1055-dX x o o o o o X x x x x xX o o o o o X . o o o o oTheory of Operation- 4g4l4g4Ap Servlce,Vol 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\i o Oe oAddress of Ascii code Skip bit Blank character 58O Theory of Opera$on- 494l4g4Ap Servtce,Vol O o o a o o o o a O o o o o o o o O o aA 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 O a o o a o o o a o o o o o Theory of Operation- 494A/494ApService,Vol Tabte7-12Triggerselectionmodes TriggerMode Freerun Internal Ext€rnal Line TableZ-13O a a o a o A o a o o o 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 A o A o o A o o o o a o o SPANATTENUATORDiagram32Calibrationcontrolselectioncodes Theory ol Operaton 4g4A/494ApService,Vot20k O o o o a a a o o A o o a a a 1st LO DRTVERDiagram33Xl K3065 x0.1 K3075 x0.01 K4072 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 O o a o o o o o O o a o a o a oU5031OUTPUTLINES 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 Figure Z-2S. DAC Varlance graph O o a O o oTheory of Operaton 494l4g4Ap Servlce,Vot O o O a o o A oRuooeour ADDRESS70 Formats O o o a oC o a o O o o o o o o o O o a o o o a oFunctionaldescription Theory of Operation- 4g4ful4g4ApService,VotO o o O a a HARMONICMIXERDiagram36 Theory of OperaUon- 494Al4g4ApServtce,Vot.1 AUXILIARYSYNTHESZERDiagram37O a a A o o O o o o o O a o o o o o a A o Theoryof Operation- 4g4A/494ApService,VolPage 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 Theory of Operation- 494l4g4Ap Service,Vot DIGITALCONTROLDiagram930. System memory map Theory of Operation- 4g4Ll4g4ApServlce,Vol31. UOaddr€ssspace Theoryof Operation- 494A/494ApServlce,VolO o c o Theory of Operation- 4g4hl4g4ApService,VolPage Bit A a O o O o o o o o o a oPollbits O o a o o o o o A o A a 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 o o o O o o a o A o o O a oO o o o o o o o a o o o o o o o o 100 O o o o o o o o o a o o101 102 CoLO o o o a o O o o o o o o Main power Supplyfurnishes all the regulated103 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 106 +5 V Voltage ReferenceSupply Theory of Operation 4g4Ll4g4ApService, VotDeterminingcomponents 107 O o o o o O a a o a o o a a a o o o a oPage Swtss Opl ONsRcV/134 CalibratorOutput cALOUT O a o o o o o o o o o O o o O o o oA 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 Goesanoffi O o o o a o o o A o A aSymmetry OoultnGffiA o o a o o Vtdeoimarker A o o o o a a o o o a o o o oGeneralterms O o o o o o Gfoesary- 494l4g4Ap Service,VolFrequencyterms AmplitudetermsDigitalstorageterms A o a o oO a a o o a O o o o o O o a o o oManual Part No G556O-00 Flrst prtnilng JAN1987 Revleed RevisioninformationO o a a o a o o o o o o a o o 12s O o o o a oSENSmVTY InstrumentO o Efr/sN O o a o o A o a oO o o A o a o o O o o o o o o O o O o o o Chg. Ref M63911 Product see llst Dale2-22-88Productsee llst DeflectionAmplifiertestpointsandadjustments Page5 olO 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 ADD Instbument PartnoO 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 O a o o o o ServiceVot.1Date 6/1190 Product494N494ApLO0 RHIVehticaldisplay Peaiaverage+ \ +i\MHz DB Bandwidth Resolution Verncal Freouency Bandwidth Display SpaivdivMHz 10dB 100kHz DB Bandwidth Limits 60dB MeasuredParti ResolutionbandwdithMinnoise Verticaldisplay Narrow Videofilter TIME/DIV Auto PeaivaveragePeavaverage A a aTercfgnix CHANcE INFoRMAnoN SpecificationPerformanceVerification Check1 dB CompressionpointProduct SeeLlst Date11 FREQUENCYSPAN/DIV 1 MHz RESOLUTIONBANDWTDTH1 MHzSpectrumAnalyzerUnder Test Ref. C1-991A o a o o O c