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Tektronix 494AP service manual Comb Generator Mooule

Models: 494AP 494A

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PerforrnanceCheck procedure- 4g4ful4g4ApServiceVol. 1

33. Check Option 4t

Frequency Span/Div Accuracv

!1t73 o.t5 MHz/Divover the cdnter6 divisionsof the display)

., Sp:laccuracy is c_heckedat centerfrequencyset- tingsof 6 GHzand11 GHz.

a. 'Connect

the test equipmentas shownin Figure

4-26. set the sp€ctrumAnalyzer follows: "ontroir ",

FREQRANGE5.4-18GHz

CENTERFREQUENCY 6 GHz

sPAN/DtV5 MHz

RESOLUTIONBANDWIDTH 100kHz

REFLEVELAs Needed

TrMElDtvAUTO

VERTICALDISPLAY 10dB/Dtv

b.Modulatethe Comb Generatorsignal with .2ps timemarkers.

c.peak the responsewith the MANUALpEAKcon- trol andset REFLEVELfor the best markerdefinition.

d.use the HorizontalposlTloN control on the Spectrum Anafyzer to position a marker to center screenthen checkthe accuracyoverthe centersix divi- sionsof the disptay.

e.Check that.the^tim€marks align with the maior graticulelineswithinS0kHz.

f.RESETth€ CENTERFREQUENCYtO11 GHZ.

S.Check SPAN/DV accuracy. Error must not exceed*50 kHz/Div.

SPECTRUTANLAYZERUIiIDERTEST

COMB

GENERATOR

MOOULE

Figure4-26. Testequipmenisetupfor checkingoption 4i span/Divaccuracy.

4-37

Image 85

Tektronix 494AP service manual Comb Generator Mooule

Contents

Tektronix Page Releaseof Copyright 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 oO a a o o o O a o o A a a a a O 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 O o o CONTENTSGonr O a o o o O a o o o A a o o o a o o O o tO o a o o o O o o o o o O o a o A o o o o o O o o o a o PowersupplyA o RAM 494A/94APServiceVot.1 VOLUME2 O t O o o o494A/494APServlceVol Preselector P3035on theVideoProcessorboard Rejection O o o A o O o494A/494APServtceVot.1 Basicblockdiagramof a -rNsynthesizer Simplifiedschematicof harmonicmixer494A/494APServlceVot Simplifieddigital-to-analog Converter O o o O a oO o a o SpEctFtcATloNs 944/494AP Service VotOptions 22 Waveguide MtxERSCHARACTERTSTTCS O o o o Do Not ServiceAloneO a o This Manual O a o o o Sedon 1 4g4l494Ap Servlce,Vol A o o o o SEL O a O o O o o oValue. WM 49OV Mlxer 18to 26.5to 33 to 490U 40 toWM 490E 490W 10to 170GHz O o A o O o o o Electricalcharacteristics O o a o o o o A o o o a +tAF. x BEF + 20 + 4NHz Freouencyrelatedcharacteristics Normal Accuracyand Ldentical Resolution Characteristic Performance UirementResolution FrequencySpan/Div OverallRange MinimumSpan/Div KHz 300 Hz 30 Hz 3Hz Typically 30 psldivision of pulse tude E o o Freouency RelatedcharacteristicsFreq O a o s O o a e33-s0GHz Accuracy Steps 10 dB/divLogMode ReferenceLevel SEt With Data ENTRYpush Buttons Accuracy Normal or Delta ModeDisplayDynamicRange Accuracy RF Attenuatol Range Accuracy Dcto 1 GHz Performancq Requirement Delta a Mode provides differentialDecadeTransitions 100 DBc A07-100 C oAmplitude Externalmixer Inputsignalcharacteristics O o o a O a o e J104 ACCESSORy Pin4 Pin5 Speclfication- 494Al4g4ApService,Vol1stLO OUTPUTpower UalrbratorcAL ouT Teristics Outputsignalcharacteristics Line O a o o Temperature 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 Leads 15.05 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 PowerSourceand power Requirements ConnectingpowerInstallation- 494A/494ApServlce,Vol O o o A 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 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 O o o o o o o o o o o o o o o o o 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 oEouipmentreouired 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 Reouired MAX 10DB/ 2ODB Preliminarypreparation O o o o o o o o o o o o PerformanceCheck procedure 4g4Ll4g4ApServiceVol 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 a PerformancecheckprocedureTrME/DrV TIME/DIVAUTO O o o o a o o a o a o o oSPAN/DIV TME/DV Auto Vertcaldtsplay A 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 Freouencyaccuracycheckpoints CheckCenterFrequencyStabilitv 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 Verticaldtsplay O 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/DVAUTO TlmeMarkGenerator SPAN/DrVMarkerOutput 50 Hz 20 ms O 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/Dtv A o a o o o a A o o o a o oA a TimeAccuracy C.**qyegp WithinS%oftherateserecitJi O a a o a o a CheckResolutionBandwidth and shape FactorO a o O o a o A o Minnose Qlglptv 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 RFATTENdB LowLosscoAxcABLEwrrx sul courEEroid Nro sMAooaeten0 GHz 7.4 GHz 9,4 c O o a a a O o a o o A oA o o o o o a Narrow Videofilter PEAK/AVERAGE A o a a a o a o o a O o o o Tmeidivauto O o a o o o A oPart Narrowvideofilter TME/DV Auto PEAK/AVERAGE O o a PerformanceCheckprocedure- 4g4Al4g4ApServlceVol.1 O a a TestsettingsTrME/DtV Display 21BIDIV VerticalNarrowvtdeofilter TIME/DIV Auto O o O o a 15.RF attenuato. test equipment setup for 50-60 dB step Centebfreouency A a a o a oDisplay Widevideofilter A o a O a a o o o o a o A o o o o oDB/Dtv O a a O o a12s 103 Trr Resolutionbandwidth 100 kHz PerformanceCheck procedure- 4g4A/4g4ApServiceVolFreorange CheckLO Emission -70 dBmor tess O aAutoresoln Otsplay 18.Test equipmentsetuplor checklngharmonicdistortion PerformanceCheckprocedure- 4g4Al4g4ApServiceVol.1 EXT @o@o@g@@ Resolutton PerformanceCheckprocedure- 4g4A/4g4ApServiceVol. lBandwtdth 1 MHz Verticaldisplay LIN Triggering INT TIME/OIV Dtsplay 2 dB/DtV VertcalTME/DV EXT Optioninstruments RrttlI3fil l t r l CheckHORIZOUTPUTSignatLevel Dtsplay SpanidivMAX Hold Tmeidiv Auto PEAK/AVERAGE Verttcal Comb Generator Mooule Ull Q15oit rilineTR5O2 OutputLevel -dBm Var dB Dot Intensity Off Gpibverificationprogram A o o o c Return O o o o o o o a oReturn 5OOOREM49XPGPIBVERIFICATION Program 5O9OINPUTT$ O a o a o r 8100PRINT 8070INPUT9040PRTNT10OMSGEOS 1OO1OPRINTSELECTEDDEVICE-CLEAR...SDC A o o 16000REM Talkonlymode 16010PAGE O c16050PRTNTTALK Jtestng only 16060INPUT Onlymode Fail JGPIBvERlFlcArtoH Cotapr-erEo ANDRENREMorEJJLrsrEN!TALKTLF OCrnoiness Message 19300cosuB19390 O o o o o o o O o o o o o o oGenerator 19530REMFAILUREDECISION Handler 19540PRINT!SELECT a UDK Can Damage StancdischargeSemiconductor Many Componentsused Thisinstrument A a o Adluctment Procedure- 4g4A/4g4ApServtceVotPreparation 7lu Selectorswttch O o o o o o o o o o o o o o o o o o o Adjustment Procedure- 494A/494ApServiceVol 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 oRrqm TIME/DIV MNL TIME/DIVAUTO Triggeringfreerun AdJustmantProcedure- 494A/4g4ApServiceVot. .l Test equlpment setup for adiusting the D€flection Amplifier Adiustment Procedure- 4g4Al4g4Ap ServiceVol O o o o o o o o o o o o o o o o Adfustment Procedure- 4g4Ll4g4ApServtceVotTriggering EXT 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 nrors O 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 =?l Adjust Log AmptitierRPlo3s-.8 R1012 R102S,R1030 @o.@@GPt AdrustmentProcedure 4g4Ll4g4ApServtce Vot O 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 O o o o O a o o o AdJustmentProcedure- 4g4l4g4Ap Service VotA a o A o O o o LNorE-l O 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 o Rcsct SETTTNGS2Tion Bandwidth Tionbandwtdth O 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 o Ai kHr O o o o O o o o oOotHi 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 Auto O a o o O o o a o Adjustment procedure 4g4Al4g4ApseMce vot O o a OTi#iFrequencyrange Rplo?2/h AdrustmentProcedure- 4g4A/494ApR1OS4 Frequency To 3.0-7.1 GHz, set Ot o AdfustrnentProcedure- 4g4A/4g4ApServtceVol A o o o A o o o o o a AdJustnentProcedure- 494A/4g4ApServtceVot @@r Lt. a o o a o O a oSnrnasrzen @ Rpzoro O o o o o A o o o o Optioninstruments Only AdjustOption0Z VR BandLevetino O 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 Troubleshooting Using Theerrormessagedisplay Diagnostics TUNINGFAILURE- 2NDLO Powersupplyoutof Regulation O a o a o TUNINGFAILURE- 1STLOMalntenance- 494A/494ApServlceVol TPl034 GroundRefer€nce Mixerfreo Desired1STLO Setnngaccuracy Auxiliary Synthesizer O o o o o o O o o o o o a Offset SET.540.672KHZ Ting Accu Racy 2NDLO Controldiagnosttca Lockdisabled Press Help Enable Pressshifttoexit PHASELOCKFAILURE- 1STLOEnabledpresshelpto Disable Strobefreq Shift Pulsestretcher O o a o e Tracemodes O o a o aMalntenance- 4S4Al4g4ApServtceVol Maintenance- 494Al4g4fupService Vof Corrective Maintenance A46A1Rl015 446A1Rl010 1R1020Selectedcomponents SERvIcING TooLs FoRBoARDTffi3.i*,o= MouNTEDcoMPoNENTs O o o o o a o o o o o o A aMafntenance- 494l4g4Ap ServtceVot.1 HorAlr HepairTerminal O o c a o o Maintenance- 494A/494ApServtceVot.1 Diode Color CodeO o o O a a Replacingassembliesand Subassemblies O o E a o o o c o o A o o a o a o o A30A57-GPIB Interface O o O o o o O o c o o o o a Sr3- 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 EAUloNl Main PowerSupplyModule Removal UpJ @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 Maintenanceadjustments Eouipmentrequiredforreturnlossadjustment Malntenance- 494A/494ApServiceVolO o o o o o o o o o o o o O a o o Mafntenance- 494A1494ApServtceVot.1 A o o o o o o o o a o O o o o o o a o o o O 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 o Maintenance- 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 17.Corect re3ponsetor g29 MHr tlrlrd and fourth resonators O o o o a o o O 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 accu A o o O o o O o a o oLr.fry- gllpin . DoNorposinouexy op Ffiffi Maintenance- 494A/4g4ApServtce Vot O a o a o a o o Maintenance- 4g4Al494ApService Vot.1 Mafnfenance- 4g4Ll494ApServtceVot.1 A a o a o o o O a a o o a o o A a o a o o o o o R404OFine TuneRanee Maintenanco- 4g4A/4g4Ap ServlceVol O a o a O a a o o o a o a o o A o o FREOSPAN/DV MAX Malntenance- 494A1494ApServtceVol O o o a a o oStart Spur Amplttude Capableof measuring0 Ogmit 2 t\,tt-tz FREQSPAN/DV MAX O o o o a a oFREQSPAN/DIV MAX Autoresoln on FREQSPAN/DIV MAX Autoresoln Reflevel RangeMinrf Atten Timeidv Malntenance- 494A/494ApServlce Vol HhFr $ fF t A o O o o o a o o a a o Malntenance- 494A/4g4ApServiceVotLl,l Jdl tt Settings Maintenance- 494A/4g4ApServtceVot.1A a O o o o a O a O o o o o a o C o o o O o o o oAddressBusTest 0xxx U302s Maintenance- 494A1494ApServiceVot..tSwtTcH Maintenance- 494A/494ApServtceVol Instrument Bus Test Troubleshootingon InstrumentbusO o o o o a o o Yr iffiI Responseto ADDRquery DATAinstrumentbus data command ADDRinstrumentbusaddresscommand Malntenance- 494Alttg4ApService Vol CombinedADDRcommandand DATAcommandDATAinstrumentbus dataquery InstrumentBusRegisters Instrumentbusregisters X x x 0 0 X x x 0 1 X x x 1 0DB7-DBO DB3-DBO O a o A e Extmixer DBO DB5-DBORfinput DB2 O o o a aDB7-O DB3-DBO LSB VcoDB6 DB2 DBO DB2-DBO Front-PanelRegisters Tapedatatransferprogram Maintenance 4g4ful4g4ApService VolOFF E o O o o aA o o o A o o o a o o Finished O o o o a o O t a 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 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 Lst ConverterDiagram12 RF InterfaceCircuits Diagram28RF Input TheRFINPUT50 connectoracceptstheinputsig O o o o o o o o o o Andpassesdtttreiueniy 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 Selection O 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 ExternalCabtes O o o o O o a o o o o O a o O a o o 2182MHz PHASELOCKED2nd LO Diagrams13 O 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 o O a O o a o MHz 2nd Converter Diagrams15 O o a a o o o A o a oO o o o o o o a o o o a o o o A o a o o o o o o SwitchandamplifierOtr 829MHz2nd Conv O 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 o Theory of Operation 4g4Al4g4ApService,Vol 110MHztF AMpLtFtERDiagram17A o o a 3rd CONVERTERDiagram17 110MHzFTLTERS Diagram17A o o o O o o o O a o A o o o o o o O o o O o a o O a o REFERENCELOCKDiagramS0 O o A o o o o o o a Bandwidthselection VariabfeResolution Diagrams19, 19,104Id,and A o o o o o O o o A a o o o o O o O o o GalnRequired BandLevetingCircuitDiagram20 A o o O o Fn9 input signat.at a nominal14 dBm, is applied LOc AMp and Detector Diagram22 316 O a o o a0316 316 684 O o o Theory of Operation- 4gA/494Ap Servtce,Vol A a o o Functionaldescrtption VIDEOAMpLtFtERDiagram23Theoryof Operation- 4g4ful4g4ApServtce,Vot 12. Selecdon ol display positlon on lhe log scale Theory of Operaton 494l4g4Ap Servlce,Vol VtDEo PROCESSORDAGRAM24 Ffi rffi Theory of Operaton 4g4Al4g4ApService,Vol O o C2016 C3026Filtercomponentcombinations DB2 DB3 Sytemis desisncto opn IT,r-.,.P.,9? DlclTAL STORAGEDiagrams25 O 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 o O o a a A o a a o o O o e 500 digitalstoragesweep positions. The resulting DEFLECTIONAMpLtFtERSDiagram27Clisplayappearsas a bright dot sweepingacross Axisand RF Interface DTAGRAM28 O a o o O o o Transferswitchdriver 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 towstate HTGH,VOLTAGESUPPLYDAGRAM29 O o A o O o o o O o a o CRT READOUTDAGRAM30 O o o o o O o o o o o oLf BLANKMSBof the characterdatais not set,the GEN RUNNTNGflip-flopunassertsR/o oFF throughoR Theory 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-d X x o o o o o X x x x x xX o o o o o X . o o o o o Theory 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 o Address 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 a Theory 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 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-13 O a a o a o A o a o o o 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 A o A o o A o o o o a o o SPANATTENUATORDiagram32 20k Theory ol Operaton 4g4A/494ApService,VotCalibrationcontrolselectioncodes 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 X0.01 DB4 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 o o o o O o a o a o a oU5031OUTPUTLINES Span Volts Span Volts TabteT-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 Figure Z-2S. DAC Varlance graph O o a O o o Ruooeour O o O a o o A oTheory of Operaton 494l4g4Ap Servlce,Vot ADDRESS70 Formats O o o a o C o a o O o o o o o o o O o a o o o a o O o o O a a Theory of Operation- 4g4ful4g4ApService,VotFunctionaldescription HARMONICMIXERDiagram36 O a a A o o AUXILIARYSYNTHESZERDiagram37Theory of OperaUon- 494Al4g4ApServtce,Vot.1 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 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 Theory of Operation- 494l4g4Ap Service,Vot DIGITALCONTROLDiagram9 30. System memory map Theory of Operation- 4g4Ll4g4ApServlce,Vol 31. UOaddr€ssspace Theoryof Operation- 494A/494ApServlce,Vol O o c o Theory of Operation- 4g4hl4g4ApService,VolPage Pollbits A a O o O o o o o o o a oBit O o a o o o o o A o A a o Ff 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 o o o O o o a o A o o O a o O 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 o 101 102 CoL O o o o a o O o o o o o o Main power Supplyfurnishes all the regulated103 Theory of Operation- 4g4A/494ApServlce,Vol O 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 106 +5 V Voltage ReferenceSupply Theory of Operation 4g4Ll4g4ApService, Vot Determiningcomponents 107 O o o o o O a a o a o o a a a o o o a oPage RcV/134 Opl ONsSwtss CalibratorOutput cALOUT O 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 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 Goesanoffi O o o o a o o o A o A aSymmetry OoultnGffi A o o a o o Generalterms A o o o o a a o o o a o o o oVtdeoimarker O o o o o o Gfoesary- 494l4g4Ap Service,VolFrequencyterms Amplitudeterms Digitalstorageterms A o a o o O a a o o a O o o o o O o a o o o Manual Part No G556O-00 Flrst prtnilng JAN1987 Revleed Revisioninformation O o a a o a o o o o o o a o o 12s O o o o a oSENSmVTY Instrument O o Efr/sN O o a o o A o a o O 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 Dale2-22-88 Productsee llst DeflectionAmplifiertestpointsandadjustments Page5 ol O 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 ADD Instbument Partno O 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 O a o o o o ServiceVot.1Date 6/1190 Product494N494Ap LO0 RHIVehticaldisplay Peaiaverage + \ +i\ MHz DB Bandwidth Resolution Verncal Freouency Bandwidth Display SpaivdivMHz 10dB 100kHz DB Bandwidth Limits 60dB Measured Parti ResolutionbandwdithMinnoise Verticaldisplay Narrow Videofilter TIME/DIV Auto Peaivaverage Peavaverage A a a Tercfgnix CHANcE INFoRMAnoN SpecificationPerformanceVerification Check1 dB Compressionpoint Product SeeLlst Date11 FREQUENCYSPAN/DIV 1 MHz RESOLUTIONBANDWTDTH1 MHzSpectrumAnalyzerUnder Test Ref. C1-991 A o a o o O c