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

Models: 494AP 494A

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Malntenance- 494A/4g4ApServiceVol. 1

Flgure 6-'15.829 MH: Converbr lilte. hlne tabs.

Troubleshooting and Calibrating the 2nd LO

The 2182MHz Oscillatorand 2200MHz Reference Mixer containcriticalprinted elementsthat are difficult to repair. Therefore the board should be replaced if damaged. lf the oscillator frequencyis beyond adjust_ mentwith the frequ€ncyadjusttab afterreplacingeither the varactor or the oscillator transistor for the 2182MHz Oscillator, the circuit board must be replaced.

Eventhoughrepaircan be accomplishedby replac- ing the board, it is recommendthat the instrumentor assemblybe returnEdto your TektronixServiceCenter for repairto ensurebest performance.

6-42

A. lsl ResonalorResponse

F e 5

B. 2nd Regonator Response

2727-159

Figure 6-16. Correct responeefor 829 MHz first and second resonators.

The 2182MHz 2nd LO requires calibrationonly when a component within the assembly has been replaced.

Table6-7 lists test equipmentrequiredto calibrate the LO section, and Table6-8 lists equipmentfor the PhaseLocksection.

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Tektronix 494AP service manual O o o o a o o, O a o o O o o o o a o o o o o o o o o o, Malntenance- 494A/4g4ApServiceVol

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 o O o o o oO a a 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 t A a o o o a o oO o a o o o O o o o o o O o a o A o o o o o Powersupply O o o o a oA o RAM VOLUME2 494A/94APServiceVot.1 O o o o O t494A/494APServlceVol Preselector P3035on theVideoProcessorboard Rejection A o O o O o o494A/494APServtceVot.1 Simplifiedschematicof harmonicmixer Basicblockdiagramof a -rNsynthesizer494A/494APServlceVot Simplifieddigital-to-analog Converter O a o O o oO o a o 944/494AP Service Vot SpEctFtcATloNsOptions 22 Waveguide MtxERSCHARACTERTSTTCS Do Not ServiceAlone O o o oO a 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. Mlxer 18to 26.5to 33 to 490U 40 to WM 49OVWM 490E 490W 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 Characteristic Performance Uirement Normal Accuracyand Ldentical ResolutionResolution FrequencySpan/Div OverallRange MinimumSpan/Div 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 Accuracy Normal or Delta Mode ReferenceLevel SEt With Data ENTRYpush ButtonsDisplayDynamicRange Accuracy RF Attenuatol Range Accuracy Dcto 1 GHz Delta a Mode provides differential Performancq RequirementDecadeTransitions 100 DBc C o A07-100Amplitude Inputsignalcharacteristics Externalmixer O a o e O o o a Speclfication- 494Al4g4ApService,Vol J104 ACCESSORy Pin4 Pin51stLO OUTPUTpower UalrbratorcAL ouT Outputsignalcharacteristics Teristics O a o o Line Speclfication- 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 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 Connectingpower PowerSourceand power RequirementsInstallation- 494A/494ApServlce,Vol 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 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 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 O o o o a o o a o a o o o TIME/DIVAUTOSPAN/DIV TME/DV Auto Vertcaldtsplay O 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 Freouencyaccuracycheckpoints 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 o CheckCenterFrequencyStabilitvAutoresoln on Verticaldtsplay Resolutionbandwidthauto 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/DVAUTO SPAN/DrV TlmeMarkGeneratorMarkerOutput 50 Hz 20 ms O 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/Dtv A o o o a o o A o a o o o aA a TimeAccuracy C.**qyegp WithinS%oftherateserecitJi CheckResolutionBandwidth and shape Factor O a a o a o aO a o O o a o A o Minnose Qlglptv 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 RFATTENdB Nro sMAooaeten LowLosscoAxcABLEwrrx sul courEEroid0 GHz 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 O o a o o o A o TmeidivautoPart Narrowvideofilter TME/DV Auto PEAK/AVERAGE PerformanceCheckprocedure- 4g4Al4g4ApServlceVol.1 O o a Testsettings O a aTrME/DtV Vertical Display 21BIDIVNarrowvtdeofilter TIME/DIV Auto 15.RF attenuato. test equipment setup for 50-60 dB step O o O o a A a a o a o CentebfreouencyDisplay Widevideofilter O a a o o o o a o A o o o o o A o aDB/Dtv O o a O a a12s 103 Trr PerformanceCheck procedure- 4g4A/4g4ApServiceVol Resolutionbandwidth 100 kHzFreorange O a CheckLO Emission -70 dBmor tessAutoresoln Otsplay PerformanceCheckprocedure- 4g4Al4g4ApServiceVol.1 18.Test equipmentsetuplor checklngharmonicdistortion @o@o@g@@ EXT PerformanceCheckprocedure- 4g4A/4g4ApServiceVol. l ResoluttonBandwtdth 1 MHz Verticaldisplay LIN Triggering INT TIME/OIV Vertcal Dtsplay 2 dB/DtVTME/DV EXT Rrttl OptioninstrumentsI3fil l t r l CheckHORIZOUTPUTSignatLevel Spanidiv DtsplayMAX Hold Verttcal Tmeidiv Auto PEAK/AVERAGE Comb Generator Mooule Q15oit riline UllTR5O2 OutputLevel -dBm Var dB Dot Intensity Off A o o o c Gpibverificationprogram O o o o o o o a o ReturnReturn 5OOOREM49XPGPIBVERIFICATION Program 5O9OINPUTT$ O a o a o r 8070INPUT 8100PRINT9040PRTNT10OMSGEOS 1OO1OPRINTSELECTEDDEVICE-CLEAR...SDC A o o O c 16000REM Talkonlymode 16010PAGE16050PRTNTTALK Jtestng only 16060INPUT Onlymode Fail ANDRENREMorE JGPIBvERlFlcArtoH Cotapr-erEoJJLrsrEN!TALKTLF OCrnoiness Message O o o o o o o O o o o o o o o 19300cosuB19390Generator 19530REMFAILUREDECISION Handler 19540PRINT!SELECT a UDK Stancdischarge Can DamageSemiconductor Many Componentsused Thisinstrument Adluctment Procedure- 4g4A/4g4ApServtceVot A a oPreparation 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 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 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 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 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 Adjust Log Amptitier =?lRPlo3s-.8 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 AdJustmentProcedure- 4g4l4g4Ap Service Vot O o o o O a o o oA a o A o 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 SETTTNGS2 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 o O o o o O o o o o Ai kHrOotHi 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 Auto Adjustment procedure 4g4Al4g4ApseMce vot O a o o O o o a o OTi#i O o aFrequencyrange AdrustmentProcedure- 4g4A/494Ap Rplo?2/hR1OS4 Frequency 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 Lt. a o o a o O a o @@rSnrnasrzen @ 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 TUNINGFAILURE- 1STLO O a o a oMalntenance- 494A/494ApServlceVol TPl034 GroundRefer€nce Desired Mixerfreo1STLO Setnngaccuracy Auxiliary Synthesizer O o o o o o O o o o o o a 2NDLO Controldiagnosttca Offset SET.540.672KHZ Ting Accu Racy PHASELOCKFAILURE- 1STLO Lockdisabled Press Help Enable PressshifttoexitEnabledpresshelpto Disable Strobefreq O o a o e Shift Pulsestretcher O o a o a TracemodesMalntenance- 4S4Al4g4ApServtceVol Corrective Maintenance Maintenance- 494Al4g4fupService Vof 1R1020 A46A1Rl015 446A1Rl010Selectedcomponents O o o o o a o o o o o o A a SERvIcING TooLs FoRBoARDTffi3.i*,o= MouNTEDcoMPoNENTsMafntenance- 494l4g4Ap ServtceVot.1 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 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 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 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 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 O o o a a o o Malntenance- 494A1494ApServtceVolStart Spur Amplttude Capableof measuring0 Ogmit 2 t\,tt-tz O o o o a a o FREQSPAN/DV MAXFREQSPAN/DIV MAX Autoresoln on Range FREQSPAN/DIV MAX Autoresoln ReflevelMinrf Atten Timeidv HhFr $ f Malntenance- 494A/494ApServlce VolF t Malntenance- 494A/4g4ApServiceVot A o O o o o a o o a a oLl,l Jdl tt Maintenance- 494A/4g4ApServtceVot.1 SettingsA a 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 Troubleshootingon Instrumentbus Maintenance- 494A/494ApServtceVol Instrument Bus TestO o o o o a o o Yr iffiI ADDRinstrumentbusaddresscommand Responseto ADDRquery DATAinstrumentbus data command CombinedADDRcommandand DATAcommand Malntenance- 494Alttg4ApService VolDATAinstrumentbus dataquery InstrumentBusRegisters X x x 0 0 X x x 0 1 X x x 1 0 InstrumentbusregistersDB7-DBO DB3-DBO O a o A e DBO DB5-DBO ExtmixerRfinput O o o a a DB2DB7-O DB3-DBO Vco LSBDB6 DB2 DBO DB2-DBO Front-PanelRegisters Maintenance 4g4ful4g4ApService Vol TapedatatransferprogramOFF O o o a E oA o o o A o o o a o 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 InterfaceCircuits Diagram28 Lst ConverterDiagram12RF Input TheRFINPUT50 connectoracceptstheinputsig 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 O o o o o o O o o o o o o Theoryof Operafon 4g4A/494ApServlce,VotTabte7-1 2NDCONVERTERIF Selection 2472MHz2ND 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 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 Switchandamplifier A o a o o o o o oOtr 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 110MHzFTLTERS Diagram17 3rd CONVERTERDiagram17A o o o O o o o O a o 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 O a o o a 3160316 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 C3026 C2016Filtercomponentcombinations 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 Enables 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 towstate O o A o O o o o O o a o HTGH,VOLTAGESUPPLYDAGRAM29 O o o o o O o o o o o o CRT READOUTDAGRAM30Lf BLANKMSBof the characterdatais not set,the GEN RUNNTNGflip-flopunassertsR/o oFF throughoR Theory 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-d X x x x x x X x o o o o oX 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 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-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 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 X0.01 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 O o a o a o a o O o a o o o o oU5031OUTPUTLINES 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 Main power Supplyfurnishes all the regulated O o o o a o O o o o o o o103 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 O o o o a o o o A o A a GoesanoffiSymmetry OoultnGffi A o o a o o A o o o o a a o o o a o o o o GeneraltermsVtdeoimarker Gfoesary- 494l4g4Ap Service,Vol O o o o o oFrequencyterms 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 O o o o a o 12sSENSmVTY 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 ServiceVot.1 O a o o o oDate 6/1190 Product494N494Ap RHI LO0Vehticaldisplay Peaiaverage +i\ + \ Resolution Verncal Freouency Bandwidth Display Spaivdiv MHz DB BandwidthMHz 10dB 100kHz DB Bandwidth Limits 60dB Measured Resolutionbandwdith PartiMinnoise Verticaldisplay Narrow Videofilter TIME/DIV Auto Peaivaverage A a a Peavaverage Specification Tercfgnix CHANcE INFoRMAnoNPerformanceVerification Check1 dB Compressionpoint FREQUENCYSPAN/DIV 1 MHz RESOLUTIONBANDWTDTH1 MHz Product SeeLlst Date11SpectrumAnalyzerUnder Test Ref. C1-991 A o a o o O c