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Tektronix 494AP service manual CoL, 102

Models: 494AP 494A

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Theoryof Operatlon			494A1494Ap
				Service,Vol. 1
				Table 7-24 (Continued)
				FRONTPANELSWTTCHMATRTXCODE/FUNCTONTABLE
ROW	coL	HEX		MAIN	<BLUE.SHIFT>	<GREEN.SHIFT>	DATA
ROW	coL	CODE		FUNCTION	FUNCTION	FUNCTION	ENTRY
X6	Y1	32		MIN RF ATTEN dB
X6	Y1	32		0
X6	Y2	33		1 0
X6	Y3	34		20
X6	Y4	35		30
X6	Y5	36		40
X6	Y6	37		50
X6	Y7	38		60
X6	Y8	39		RECALL	STORE(settings)		BACKSPACE
X6	Y9	3A		AF	MKR- CENTER
x6	Y l 0	3B		COUNT	COUNTRESOLN
x7	Y1	3C		FREQUENCYSPAN/DV
x7	Y2	3D		FREOUENCYSPAN/DV
x7	Y3	3E		FREOUENCYSPAN/DV
x7	Y4	3F		FREOUENCYSPAN/DIV
x7	Y5	40		RESOLUTIONBANDWIDTH
x7	Y6	41		RESOLUTIONBANDWIDTH
x7	Y7	42		RESOLUTIONBANDWIDTH
x7	Y8	43		RESOLUTIONBANDWIDTH
x7	Y9	4A		PLOTa/RESETTO LOCALb	PLOTb	SEND SROb
K7	Y10	45		LINE	MACRO MENU	ASSIGN 1
x8	Y1	46		REFERENCELEVEL
X8	Y2	47		REFERENCELEVEL
x8	Y3	48		REFERENCELEVEL
x8	Y4	49		REFERENCELEVEL
x8	Y5	(NotUsed)
x8	Y6	(NotUsecl)
x8	Y7	(NotUsed)
x8	Y8	(Not Used)
x8	Y9	(NotUsed)
x8	Yl0	(NotUsed)

astandard instrument. bP-version only.

7-102

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Tektronix 494AP service manual CoL, 102

Contents

Tektronix Page O o o o o o o o a o O o o o o o o o o Releaseof Copyright O a a o o o O oO o o o o O a o o A a a a a Warranty O o o o oO o A a a a A o a o o a o o 494A/494APServiceVot.1 O oA o A o o o o o o o O a o o o a oA o o 494A/494APservice Manuatis divided into two volumes O aO o o o o o o CONTENTSGonr O o o O a o o o O a o o o O o a o o o O o tA a o o o a o o O o o o o o O o a o A o o o o o A o PowersupplyO o o o a o RAM VOLUME2 494A/94APServiceVot.1 494A/494APServlceVol O o o oO t Preselector P3035on theVideoProcessorboard Rejection A o O o O o o494A/494APServtceVot.1 494A/494APServlceVot Simplifiedschematicof harmonicmixerBasicblockdiagramof a -rNsynthesizer Simplifieddigital-to-analog Converter O a o O o oO o a o Options 22 Waveguide 944/494AP Service VotSpEctFtcATloNs MtxERSCHARACTERTSTTCS O a o Do Not ServiceAloneO o o o This Manual O a o o o A o o o o Sedon 1 4g4l494Ap Servlce,Vol O a O o O o o o SELValue. WM 490E 490W Mlxer 18to 26.5to 33 to 490U 40 toWM 49OV 10to 170GHz O o A o Electricalcharacteristics O o o o O o a o o o o A o o o a Freouencyrelatedcharacteristics +tAF. x BEF + 20 + 4NHz Resolution FrequencySpan/Div OverallRange MinimumSpan/Div Characteristic Performance UirementNormal Accuracyand Ldentical Resolution KHz 300 Hz 30 Hz 3Hz Typically 30 psldivision of pulse tude Freouency Relatedcharacteristics E o oFreq O o a e O a o s33-s0GHz Accuracy Steps 10 dB/divLogMode DisplayDynamicRange Accuracy Accuracy Normal or Delta ModeReferenceLevel SEt With Data ENTRYpush Buttons RF Attenuatol Range Accuracy Dcto 1 GHz DecadeTransitions Delta a Mode provides differentialPerformancq Requirement 100 DBc C o A07-100Amplitude Inputsignalcharacteristics Externalmixer O a o e O o o a 1stLO OUTPUTpower Speclfication- 494Al4g4ApService,VolJ104 ACCESSORy Pin4 Pin5 UalrbratorcAL ouT Outputsignalcharacteristics Teristics O a o o Line CE03-15 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 Leads O o o o o o o 15.05 28.85inches232x 392x 732.gmmSrDEvtEw O c o A a o o 494A1494ApService,Vot O a o o o o o a o o A o a o o oUnpackingand INITIALINSPECT6N Installation- 494A/494ApServlce,Vol ConnectingpowerPowerSourceand power Requirements O o o A o o o o o o o O o o o o o o O o o o o a o O o a o o o o o o O 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 o O o o o o o o o o o o o o o o o o O o o o o oEouipmentreouired 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 Reouired Preliminarypreparation MAX 10DB/ 2ODB PerformanceCheck procedure 4g4Ll4g4ApServiceVol O o o o o o o o o o o o Performancecheckprocedure O 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 aTrME/DrV SPAN/DIV O o o o a o o a o a o o oTIME/DIVAUTO TME/DV Auto Vertcaldtsplay A 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 Freouencyaccuracycheckpoints Autoresoln 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 Verticaldtsplay O 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/DVAUTO MarkerOutput SPAN/DrVTlmeMarkGenerator 50 Hz 20 ms Autoresoln 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/Dtv A a A o o o a o oA o a o o o a TimeAccuracy C.**qyegp WithinS%oftherateserecitJi O a o O o a o A o CheckResolutionBandwidth and shape FactorO a a o a o a Minnose Qlglptv 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 RFATTENdB 0 GHz Nro sMAooaetenLowLosscoAxcABLEwrrx sul courEEroid 7.4 GHz 9,4 c O o a o o A o O o a a aA o o o o o a A o a a a o a o o a O o o o Narrow Videofilter PEAK/AVERAGE Part O o a o o o A oTmeidivauto Narrowvideofilter TME/DV Auto PEAK/AVERAGE PerformanceCheckprocedure- 4g4Al4g4ApServlceVol.1 O o a Testsettings O a aTrME/DtV Narrowvtdeofilter VerticalDisplay 21BIDIV TIME/DIV Auto 15.RF attenuato. test equipment setup for 50-60 dB step O o O o a Display A a a o a oCentebfreouency Widevideofilter O a a o o o o a o A o o o o o A o aDB/Dtv 12s O o aO a a 103 Trr PerformanceCheck procedure- 4g4A/4g4ApServiceVol Resolutionbandwidth 100 kHzFreorange Autoresoln O aCheckLO Emission -70 dBmor tess Otsplay PerformanceCheckprocedure- 4g4Al4g4ApServiceVol.1 18.Test equipmentsetuplor checklngharmonicdistortion @o@o@g@@ EXT Bandwtdth 1 MHz PerformanceCheckprocedure- 4g4A/4g4ApServiceVol. lResolutton Verticaldisplay LIN Triggering INT TIME/OIV Vertcal Dtsplay 2 dB/DtVTME/DV EXT I3fil l t r l RrttlOptioninstruments CheckHORIZOUTPUTSignatLevel Spanidiv DtsplayMAX Hold Verttcal Tmeidiv Auto PEAK/AVERAGE Comb Generator Mooule TR5O2 Q15oit rilineUll OutputLevel -dBm Var dB Dot Intensity Off A o o o c Gpibverificationprogram Return 5OOOREM49XPGPIBVERIFICATION Program O o o o o o o a oReturn 5O9OINPUTT$ O a o a o r 9040PRTNT10OMSGEOS 8070INPUT8100PRINT 1OO1OPRINTSELECTEDDEVICE-CLEAR...SDC A o o 16050PRTNTTALK Jtestng only 16060INPUT O c16000REM Talkonlymode 16010PAGE Onlymode Fail JJLrsrEN!TALKTLF OCrnoiness ANDRENREMorEJGPIBvERlFlcArtoH Cotapr-erEo Message Generator O o o o o o o O o o o o o o o19300cosuB19390 19530REMFAILUREDECISION Handler 19540PRINT!SELECT a UDK Semiconductor Many Componentsused StancdischargeCan Damage Thisinstrument Preparation Adluctment Procedure- 4g4A/4g4ApServtceVotA a o 7lu Selectorswttch Adjustment Procedure- 494A/494ApServiceVol O o o o o o o o o o o o o o o o o o o Rrqm 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 MNL AdJustmantProcedure- 494A/4g4ApServiceVot. .l TIME/DIVAUTO Triggeringfreerun Adiustment Procedure- 4g4Al4g4Ap ServiceVol Test equlpment setup for adiusting the D€flection Amplifier Adfustment Procedure- 4g4Ll4g4ApServtceVot O o o o o o o o o o o o o o o oTriggering EXT 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 nrors Adjustnent Procedure- 4g4A/4g4ApServtceVot O a 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 RPlo3s-.8 Adjust Log Amptitier=?l R1012 R102S,R1030 AdrustmentProcedure 4g4Ll4g4ApServtce Vot @o.@@GPt O o a o o o o o o o a o o o a o Adjustment Procedure- 494l4g4Ap ServiceVot A o o o a o o a o o o o o o o o o o o oFilrcsotocr A a o A o O o o AdJustmentProcedure- 4g4l4g4Ap Service VotO o o o O a o o o LNorE-l O 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 a Tion Bandwidth SETTTNGS2Rcsct Tionbandwtdth O 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 o O o o o O o o o o Ai kHrOotHi 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 Auto Adjustment procedure 4g4Al4g4ApseMce vot O a o o O o o a o OTi#i O o aFrequencyrange R1OS4 Frequency AdrustmentProcedure- 4g4A/494ApRplo?2/h To 3.0-7.1 GHz, set AdfustrnentProcedure- 4g4A/4g4ApServtceVol Ot o A o o o AdJustnentProcedure- 494A/4g4ApServtceVot A o o o o o a Snrnasrzen @ Lt. a o o a o O a o@@r Rpzoro O o o o o A o o o o AdjustOption0Z VR BandLevetino Optioninstruments Only AdrustmentProcedure- 4g4A/4g4ApServlceVot,I O a o a o o o o oRFouT OUr Introduction Sectfon6 494A/494ApServicc Vot.1Relativesusceptibilityto Staticdischargedamage Maintenance- 4g4Al4g4ApServlce Vot TroubleshootingAids Maintenance- 494A1494ApServiceVol367-028s,00 Page Diagnostics Troubleshooting Using Theerrormessagedisplay TUNINGFAILURE- 2NDLO Powersupplyoutof Regulation Malntenance- 494A/494ApServlceVol TUNINGFAILURE- 1STLOO a o a o TPl034 GroundRefer€nce 1STLO Setnngaccuracy DesiredMixerfreo Auxiliary Synthesizer O o o o o o O o o o o o a 2NDLO Controldiagnosttca Offset SET.540.672KHZ Ting Accu Racy Enabledpresshelpto Disable PHASELOCKFAILURE- 1STLOLockdisabled Press Help Enable Pressshifttoexit Strobefreq O o a o e Shift Pulsestretcher O o a o a TracemodesMalntenance- 4S4Al4g4ApServtceVol Corrective Maintenance Maintenance- 494Al4g4fupService Vof 1R1020 A46A1Rl015 446A1Rl010Selectedcomponents Mafntenance- 494l4g4Ap ServtceVot.1 O o o o o a o o o o o o A aSERvIcING TooLs FoRBoARDTffi3.i*,o= MouNTEDcoMPoNENTs HorAlr HepairTerminal Maintenance- 494A/494ApServtceVot.1 Diode Color Code O o c a o oO o o O a a O o E a o o o c o o A o o a o a o o Replacingassembliesand Subassemblies O o O o o o O o c o o o o a A30A57-GPIB Interface Maintenance- 494Al4g4ApServiceVot.1 Sr3- ltILlrxER 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\ UpJ Maintenanceadjustments 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 Malntenance- 494A/494ApServiceVol EouipmentrequiredforreturnlossadjustmentO 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.1 O 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 o Maintenance- 494l4g4Ap ServlceVot Malntenance- 494A/4g4ApServiceVol O o o o a o oO 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 resonators O 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 accu O o a o o A o o O o oLr.fry- gllpin . DoNorposinouexy op Maintenance- 494A/4g4ApServtce Vot Ffiffi Maintenance- 4g4Al494ApService Vot.1 O a o a o a o o A a o a o o o Mafnfenance- 4g4Ll494ApServtceVot.1 O a a o o a o o A a o a o o o o o Maintenanco- 4g4A/4g4Ap ServlceVol R404OFine TuneRanee O a a o o o a o a o o O a o a A o o FREOSPAN/DV MAX Start Spur Amplttude O o o a a o oMalntenance- 494A1494ApServtceVol Capableof measuring0 Ogmit 2 t\,tt-tz O o o o a a o FREQSPAN/DV MAXFREQSPAN/DIV MAX Autoresoln on Minrf Atten RangeFREQSPAN/DIV MAX Autoresoln Reflevel Timeidv HhFr $ f Malntenance- 494A/494ApServlce VolF t Ll,l Malntenance- 494A/4g4ApServiceVotA o O o o o a o o a a o Jdl tt A a Maintenance- 494A/4g4ApServtceVot.1Settings O o o o a O a C o o o O o o o o O o o o o a oAddressBusTest Maintenance- 494A1494ApServiceVot..t 0xxx U302sSwtTcH O o o o o a o o Troubleshootingon InstrumentbusMaintenance- 494A/494ApServtceVol Instrument Bus Test Yr iffiI ADDRinstrumentbusaddresscommand Responseto ADDRquery DATAinstrumentbus data command DATAinstrumentbus dataquery CombinedADDRcommandand DATAcommandMalntenance- 494Alttg4ApService Vol InstrumentBusRegisters DB7-DBO X x x 0 0 X x x 0 1 X x x 1 0Instrumentbusregisters DB3-DBO O a o A e DBO DB5-DBO ExtmixerRfinput O o o a a DB2DB7-O DB3-DBO DB6 DB2 DBO VcoLSB DB2-DBO Front-PanelRegisters Maintenance 4g4ful4g4ApService Vol TapedatatransferprogramOFF A o o o A o o o a o o O o o aE o Finished O t a O o o o a o O 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 Secton 494A1494Ap Service,Vot Pr signals. Blockdiagrams ShowingmoreRollow 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 o 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 o Andpassesdtttreiueniy oroPage Tabte7-1 O o o o o o O o o o o o oTheoryof Operafon 4g4A/494ApServlce,Vot 2NDCONVERTERIF Selection O 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 ExternalCabtes 2182MHz PHASELOCKED2nd LO Diagrams13 O o o o O o a o o o o O a o O a o o O 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 Vco MHz 2nd Converter Diagrams15 O a O o a o A o a o O o a a o o oO o o o o o o a o o o a o o o Otr SwitchandamplifierA o a o o o o o o 829MHz2nd Conv O 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 o 110MHztF AMpLtFtERDiagram17 Theory of Operation 4g4Al4g4ApService,VolA o o a A o o o O o o o O a o 110MHzFTLTERS Diagram173rd CONVERTERDiagram17 A o o o o o o REFERENCELOCKDiagramS0 O o o O o a o O a o O o A o o o o o o a VariabfeResolution Diagrams19, 19,104Id,and Bandwidthselection A o o o o o O o o A a o o o o O o O o o BandLevetingCircuitDiagram20 GalnRequired A o o O o LOc AMp and Detector Diagram22 Fn9 input signat.at a nominal14 dBm, is applied 0316 O a o o a316 316 684 O o o A a o o Theory of Operation- 4gA/494Ap Servtce,Vol VIDEOAMpLtFtERDiagram23 FunctionaldescrtptionTheoryof Operation- 4g4ful4g4ApServtce,Vot Theory of Operaton 494l4g4Ap Servlce,Vol 12. Selecdon ol display positlon on lhe log scale VtDEo PROCESSORDAGRAM24 Theory of Operaton 4g4Al4g4ApService,Vol Ffi rffi O o Filtercomponentcombinations C3026C2016 DB2 DB3 DlclTAL 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,Vol O o e O o a a A o a a o o DEFLECTIONAMpLtFtERSDiagram27 500 digitalstoragesweep positions. The resultingClisplayappearsas a bright dot sweepingacross O a o o O o o Axisand RF Interface DTAGRAM28 O 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 towstate O o A o O o o o O o a o HTGH,VOLTAGESUPPLYDAGRAM29 Lf BLANKMSBof the characterdatais not set,the O o o o o O o o o o o oCRT READOUTDAGRAM30 GEN RUNNTNGflip-flopunassertsR/o oFF throughoR Theory 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-d X o o o o o X x x x x xX x o o o o o X . 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 Theory of Operation- 4g4l4g4Ap Servlce,Vol Oe o \i o Address 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,Vol SWEEPDiagram31 Theory of Operaton 494A/494ApService,VolA o o o a o o o o o O a o o o o o a o o A o o O a O a o o o o o o o o 20ssldiv 100D4 D3 D2 D1 do 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-13 A o a o o o o O a a o a o A 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 o Theory ol Operaton 4g4A/494ApService,Vot 20kCalibrationcontrolselectioncodes 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 X0.01 O o a o o o o o O a a o a O o o o o o o o o o a DB4DB7 Preselectordriver Diagram34 A oO o a a o o o A o U5031OUTPUTLINES O o a o a o a oO o a o o o o o Span Volts Span Volts Theory of Opera0on- 4g4\l4g4Ap Servlce,Vot TabteT-18Preselector Freouencybands Centerfreouencycontrol DIAGRAM35 O o A a a a o O o oA o a o o o o O o a O o o Figure Z-2S. DAC Varlance graph O o O a o o A o RuooeourTheory of Operaton 494l4g4Ap Servlce,Vot O o o a o ADDRESS70 Formats O o a o o o a o C o a o O o o o o o o o Theory of Operation- 4g4ful4g4ApService,Vot O o o O a aFunctionaldescription HARMONICMIXERDiagram36 AUXILIARYSYNTHESZERDiagram37 O a a A o oTheory 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 e o o o o o o o o o o o O o o aO 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,Vot Theory of Operation- 4g4Ll4g4ApServlce,Vol 30. System memory map Theoryof Operation- 494A/494ApServlce,Vol 31. UOaddr€ssspace Theory of Operation- 4g4hl4g4ApService,Vol O o c oPage A a O o O o o o o o o a o PollbitsBit A o A a o O o a o o o o o A a O o o o o Ff nsrrrcrr qrs crccrLunr 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 o O 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 100 101 CoL 102 103 Main power Supplyfurnishes all the regulatedO o o o a o O o o o o o o Theory of Operation- 4g4A/494ApServlce,Vol O a o o o o o o o a o o o o o O o o o A o o o o oTheory of Operaton 494A/494ApServtce,Vot 105 Theory of Operation- 494l4g4Ap Servlce,VotOenanon*l Theory of Operation 4g4Ll4g4ApService, Vot 106 +5 V Voltage ReferenceSupply O o o o o O a a o a o o a a a o o o a o Determiningcomponents 107Page Opl ONs RcV/134Swtss O a o o o o o o o o o O o o O o o o CalibratorOutput cALOUT A 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 o O a o O o o o o o o o o o o oFreouency Symmetry O o o o a o o o A o A aGoesanoffi OoultnGffi A o o a o o A o o o o a a o o o a o o o o GeneraltermsVtdeoimarker Frequencyterms Gfoesary- 494l4g4Ap Service,VolO o o o o o Amplitudeterms A o a o o Digitalstorageterms O o a o o o O a a o o a O o o o o Revisioninformation Manual Part No G556O-00 Flrst prtnilng JAN1987 Revleed O o a a o a o o o o o o a o o SENSmVTY O o o o a o12s Instrument O o O o a o o A o a o Efr/sN O 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 M63911 DeflectionAmplifiertestpointsandadjustments Page5 ol Productsee llst O a o o o o o o o o Performance Checkprocedure O o o o o O o aInstrument Manual A o o o O o O a a Instbument Partno ADD O o o o o O o o o a Perfrmanceheck pRocEDURE change stepr r as foltows Product494N4g4Ap ServiceVolDate 5/u9o O a o o o Date 6/1190 ServiceVot.1O a o o o o Product494N494Ap Vehticaldisplay RHILO0 Peaiaverage +i\ + \ MHz 10dB 100kHz Resolution Verncal Freouency Bandwidth Display SpaivdivMHz DB Bandwidth DB Bandwidth Limits 60dB Measured Minnoise Verticaldisplay ResolutionbandwdithParti Narrow Videofilter TIME/DIV Auto Peaivaverage A a a Peavaverage PerformanceVerification SpecificationTercfgnix CHANcE INFoRMAnoN Check1 dB Compressionpoint SpectrumAnalyzerUnder Test FREQUENCYSPAN/DIV 1 MHz RESOLUTIONBANDWTDTH1 MHzProduct SeeLlst Date11 Ref. C1-991 A o a o o O c