品牌：罗德与施瓦茨Rohde&SchwarzThefamilycomprisesthefiveVectorNetworkAnalyzersZVRL,ZVREandZVRaswellasZVCEandZVCwhichextendthefrequencyrangeto8GHz.Allmodelsarecompactinstrumentswithintegratedgenerator,testsetandreceiver,eachtailoredtoadifferentfieldofapplication.Allanalyzerscanbesubsequentlyupgradedtothehigher-classmodels.ZVREandZVCE:theeconomymodelsThetestsetofthesemodelscomprisestwoSWRbridges(ZVRE)ordirectionalcouplers(ZVCE),anRFswitch,twomeasurementchannelsandonereferencechannel.TheymeasurethemagnitudeandphaseofallfourS-parametersofaDUT,allowafulltwo-portcalibration(TO***)andh***eanexceptionallyhighaccuracyandwidedynamicrange.ZVRE,ZVCE(bidirectional,3channels)ZVRandZVC:theuniversalmodelsZVRandZVCcompriseatestsetwithtwoSWRbridges(ZVR)ordirectionalcouplers(ZVC),anRFswitch,twomeasurementchannelsand-unlikeZVREandZVCE-tworeferencechannels.Withthisconfigurationavarietyofnovelcalibrationprocedures,egTNA,canbeperformed,whichc***iderablyimprovetheaccuracyparticularlyinnon-coaxialapplicati***.ZVRandZVCaretheallroundersofthefamilyandsuitableforapplicati***inR&Dandproductionnomatterhowsophisticated.ZVR,ZVC(bidirectional,4channels)TestsetsThenetworkanalyzerscanbeprovidedwithdifferenttestsetopti***sothatanoptimallyconfiguredtestsetupis***ailabletosuittheapplicati***.Forthe4GHzanalyzers"active"or"passive"testsetswithacharacteristicimpedanceof50Wor75Ware***ailable.A50Wpassivetestsetisstandardequipment.Withactivetestsets,theDUTcanbebiaseddirectlyviatheinnerconductorofthetestport.The8GHzmodelsZVCEandZVCarealwaysequippedwith50Wactivetestsets.Dependingonthemodel,thetestsetscompriseoneortwopowersplitters,anelectronicswitchandoneortwoSWRbridgesordirectionalcouplers.Additionalstepattenuators(0dBto70dB,componentsmarkedredinthedrawingsbelow)canbeinsertedintothegeneratorpathsandthetwomeasurementchannelstoextendthepowerrangeofthereceiversto+27dBmandtolowerminimumoutputpowerto-95dBm.WhenthetestsetsarefittedwithattenuatorsandtheExternalMeasurementsoption(componentsmarkedgreeninthedrawingsbelow),generatorandreceivercanbealternativelyswitchedtothreeportsonthefrontpanel(OUTPUTa1,INPUTb1,INPUTb2).Thisincreasesoutputpower,sensitivityanddynamicrange,andmeasurementsdownto10Hzcanbeperformedwiththe4GHzmodels.Inaddition,theflexibilityonexternaltestsets,e.g.usinganexternalpre-amplifier,isenhanced.TheReferenceChannelPorts(componentsmarkedblueinthedrawingsbelow)allowtofeedthesignalforthereferencechannela1fromoutside.Thisfeaturefacilitatese.g.phasemeasurementsonfrequencyconvertingdevices.ThetestportsarefittedwithfemaleNconnectors.TestSetZVREandZVCETestSetZVRandZVCFeaturesExcellentdynamicrange>130dB(IFbandwidth10Hz)Lowinherentnoise<-130dBm(measurementbandwidth3kHz)Broadfrequencyrangeforuniversaluse10Hzto4GHz(ZVRE,ZVR)20kHzto8GHz(ZVCE,ZVC)Highmeasurementspeed<125µs/point(normalized)<240µs/point(fullycalibrated)FastdatatransferviaIEC/IEEEbusTransfertime<15ms(200points)Customized,upgradablefamilyconceptModulardesignusingopti***Highsweeprate>>25sweeps/s(200points)ManualcalibrationtechniquesTOM,TRM,TRL,TNA,TOM-X,TO***AutomaticcalibrationAutoKalCompatibilitywithPC,CAEInternalPCwithWindowsNToperatingsystemsuitableforPCapplicati***Speed>>25sweeps/sTheextremelylow-noiseandfastsynthesizerinconjunctionwithanexceptionallylargemeasurementbandwidthofupto26kHzallowsreal-timeresultdisplay.TheZVxmeasuresnotintwosubsequentsweepsbutateveryfrequencypointinforwardandbackwarddirectionandthusallfourS-parameters-includingsystemerrorcorrection.Thisensuresreal-timedisplayoffullycorrecteddataevenduringalignmentswithreducedsweepspeeds.ThedynamicrangeofZVxismorethan95dBevenatahighmeasurementrateof25sweeps/sand10kHzmeasurementbandwidth.Dynamicrange>130dBThehighstopbandandlowpassbandattenuationofmodernRFcomponentsplacenewdemandsonnetworkanalyzers.Thankstofundamentalmixing,theusefuldynamicrangeofRohde&Schwarznetworkanalyzersismorethan25dBbetterthanwithconventionalsamplingtechniques.Becauseofthelow-noisefrontend,Rohde&Schwarznetworkanalyzersattainadynamicrangeof>130dB,sotran***issionmeasurementsonDUTswithextremelyhighstopbandattenuationcanbeperformedwithhighaccuracy,evenatlowinputlevels.Powercalibration:testingactiveDUTsPowercalibrationperformedinthefactoryenablesc***tantoutputpowerandhighaccuracyinthemeasurementofabsoluteinputleveloverthefullfrequencyrange.Thisisparticularlyimportantforfrequency-convertingmeasurementsandnon-linearmeasurementsonactivecomponents.Furthermore,frequency-dependentlevelvariati***ofanexternaltestsetupcanbemeasuredandcompensatedwiththeaidofthePowerCalibrationoption.Simultaneousdisplayoffourtracesonthe26cmcolourLCDTheZVxmodelsarethefirstnetworkanalyzersinthispriceclasstosimultaneouslydisplayuptofourmeasurementtraceswithindependentparameters(measuredquantity,frequencyrange,bandwidth,etc).Thelarge,activecolourLCDwithhighrefreshrateallowsprecisealignmentswithoutoperatorfatigue.InternalPCThenetworkanalyzersareequippedwithaPCboardincludinginterfacesforkeyboard,mouse,printer,externalmonitorandWindowsNTastheoperatingsystem.InthePCmode,theinternalharddiskcanbeaccessedandPCprogramsexecutedontheZVR.Thisfunctionc***iderablysimplifiesoperation,processingandresultrecording.TheoptionalEthernetlink,theintegrationofanyprinterdriverandtheexecutionofIEC/IEEEbuscontrolprogramsonZVRc***iderablyextendtheapplicationrangeandperformance.Completesetups,traces,numericalresults,limitlines,calibrationdata,macrosandscreenshotscanbestoredontheharddiskoronfloppydisks.The***ailableformats(e.g.WMF,ASCII,Serenade....)allowproblem-freeimporttoWindowsprograms.ThedatacanbeprocessedintheZVRwiththeaidoftheinternalPC.AutomatictestsystemsFastrecordingandprocessingofmeasureddataand,inaddition,anSCPI-conformalIEC/IEEEbuscommandsetmakeallmodelsoftheZVRfamilyidealforuseinautomaticmeasurementsystems.AllmodelsareequippedwithtwoIEC/IEEEbusinterfacesasstandard.OneisusedforanalyzercontrolviaanexternalPC,theotherforcontrollingexternaldevices,e.g.signalsourcesforintermodulationormixermeasurements,fromtheZVR.AnotheroptionalIEC/IEEEbusinterfaceisprovidedfortheinternalPC.Viathisinterface,IEC/IEEEcontrolprogramscanbeexecutedontheinternalPC,thusenablingtheZVRtocontrolitselforcompletetestsystems.TheEthernetoptionallowsdataexchangeandcontrolviaLAN.EfficientcalibrationtechniquesTheclassic12-termcalibrationmethodrequiresfourcalibrationstanda***:Through,Open,ShortandMatch.ThenameTO***giventothismethodisanabbreviationofthestanda***'names.Anumberofothermoderncalibrationmethods(TOM,TRM,TRL,TNA)arealsoprovidedinZVRandZVC.UnlikeTO***(12-term)theyrequireonlythreedifferentstanda***.Additionally,lines(L),reflectingone-portswithunknownreflectioncoefficient(R),matchedattenuators(A)andtwo-portnetworks(N)withsymmetricalreflectioncanbeused.Duetoitssimplicity,TOMisthemethodrecommendedforgeneralapplicati***.Forcalibrationatfrequenciesupto100MHzitisnotevennecessarytoconnectanopencircuit,andtheportsmaysimplybeleftopen.Thusacompletetwo-portcalibrationcanbeperformedwithonlytwocalibrationstanda***.TOMallowsalsoimplicitverificationsothaterrorscausedbydefectivecalibrationkitsoroperatingerrorsareexcluded.Thisc***iderablyenhancesreliabilityinthelaboratoryandparticularlyinproduction.Withon-wafermeasurements,measurementsonPCBsorinfixturesitisdifficulttodesignorspecifysuitablecalibrationstanda***atjustifiableeffort.ThisproblemcanbesolvedwiththeTNAandTRMcalibrationmethodsdevelopedandpatentedbyRohde&Schwarz.Withthesemethodsthecharacteristicsofthecalibrationstanda***neednotbefullyknown.WithTNA,forinstance,afulltwo-portcalibrationcanbeperformedwithtwostanda***:ifreflectionsymmetryisprovidedatthereferenceplanes,thecalibrationstepwithnetwork(N)doesnotrequireastandardtobeconnected,thetestportscanjustbeletopen.Justathrough(T)withknownlengthandamatchedattenuator(A)arerequired.ThecalibrationeffortisreducedtoaminimumwhentheAutoKaloptionisusedthatrequiresonlyonesimplethrough-connection.详情请联系我们：深圳市达瑞博电子有限公司地址：深圳市福田区福虹路华强花园C座14F电话：86-755-82514800传真：86-755-82514709手机：13421364554<lucy>18938661102<小高>ＱＱ：***(1):461489287***(2):820001***(3):349899792ＭＳＮ：liaoguomei@邮箱：daruibo@)