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基于LXI总线的双通道任意波形发生器的设计的中期报告.docx

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基于LXI总线的双通道任意波形发生器的设计的中期报告 Abstract: Thismid-termreportpresentstheprogressmadeinthedesignofadual-channelarbitrarywaveformgeneratorbasedontheLXIbus.Thereportincludesabriefoverviewoftheprojectobjectivesandrequirements,aswellasadetaileddescriptionofthehardwareandsoftwarecomponentsthathavebeendevelopedthusfar.Additionally,thereportoutlinesthetestingandvalidationproceduresthathavebeencarriedout,alongwiththeresultsobtained.Finally,thereportdiscussesthechallengesencounteredduringthedesignprocessandpresentsplansforfuturework. Introduction: Theprojectaimstodesignadual-channelarbitrarywaveformgeneratorthatcanoutputhigh-frequencysignalswithverylowjitterandspectralpurity.Thegeneratorisrequiredtooperateoverafrequencyrangeof1Hzto100MHz,withaminimumverticalresolutionof14bits.Moreover,itmustprovideuserswiththeabilitytogeneratecomplexwaveforms,includingsine,square,triangle,pulse,andarbitrarywaveforms.Asaprerequisite,thegeneratormustutilizetheLXIprotocolforcommunicatingwithotherinstrumentsanddevicesinatestandmeasurementsystem. Designoverview: Thearbitrarywaveformgeneratorisdesignedasatwo-boardstack,withthetopboardhandlingthesignalprocessingandthebottomboardservingasthepowersupplyandcontrolsection.Thesignalprocessingboardincorporatestwohigh-speeddigital-to-analogconverters(DACs)providedbyAnalogDevicesInc.,namelytheAD9154-2500andAD9154-1500models.TheseDACscanconvertdigitalsampleswitharesolutionof14bitstoananalogvoltagesignalatamaximumrateof2.5GS/sand1.5GS/sforeachchannel,respectively.TheDACsaredrivenbyafield-programmablegatearray(FPGA)thatimplementsthesignalprocessingalgorithmsrequiredtogeneratethedesiredwaveform. TheFPGAisprogrammedusingahardwaredescriptionlanguage(HDL),andtheFPGAcodeiscompiledandloadedintotheFPGAusingadevelopmentkit.TheHDLcodeincludesarangeofsignalprocessingfunctions,suchassignalfiltering,signaldelay,signalmodulation,andwaveformgeneration.Agraphicaluserinterface(GUI)hasbeendevelopedtoenableuserstoconfigurethegeneratorsettings,includingthewaveformtype,frequency,amplit