产品名称：HP339A失真仪现货厂家：美国惠普AutomaticTrueRMSdetectionDistortionMeasurementSetUltralowdistortionmeasuringsystemcompletewithtotalharmonicdistortion(THD)analyzer,truermsvoltmeter,andsinew***eoscillator.THDmeasurementsoverthe10Hzto110kHzfrequencyband,includingharmonicsto330kHz.Alsofeaturesbuilt-intrackingoscillator.DistortionMeasurementsfundamentalfrequencyrangeis10Hzto110kHzwith2digitresolutionmeasurementrangeis100%to0.01%,(0dBto-80dB)OscillatorFrequencyrangeis10Hzto100kHzwith2digitresolution.Outputlevelisvariablefrom4Vrmsto1mVrms.Oscillatordistortion(>600ohmload,<3Vrms)10Hzto20kHz<-93dB(0.0022%)THD20kHzto30kHz<-85dB(0.0056%)THD30kHzto50kHz<-80dB(0.01%)THD50kHzto80kHz<-70dB(0.032%)THD80kHzto110kHz<-65dB(0.056%)THDVoltmeterRangeis1mVrmsfullscaleto300Vrmsfullscale.Hewlett-Packard'sModel339ADistortionMeasurementSetisanultralowdistortionmeasuringsystemcompletewithtotalharmonicdistortion(THD)analyzer,true-rmsvoltmeter,andsinew***eoscillator.This***all,lightweightbenchmeasurementsetallowsyoutomakeTHDdistortionmeasurementsaslowas0.0018%overa10Hzto110kHzfrequencybandincludingharmonicsto330kHz.ForfastandeasyTHDmeasurementsthebuilt-intrackingoscillatorinHP's339As***estesttimebecauseyoutuneoneinstrumentinsteadoftwo.FrequencyandlevelmeasurementsareeasytodowithHP's339A'svoltmeter,whichoffersyoua1mVto300Vmeasurementrange.TheRelativeLevelmodehasbeenincludedtofurthersimplifyfrequencyresp***emeasurements.Justseta0dBmreferenceatanyfrequencyfrom10Hzto110kHz.Gainmeasurementscanbereaddirectlyfromtheeasy-to-readmeter.OperationSimplicityAutomaticfrequencytuningandset-levelfeaturesallowyoutomakerapid,errorfreeTHDmeasurements.The339A'sbuilt-intrackingoscillatoreliminatestheneedtofindthefundamentalfrequencyandtunetheanalyzerforanull.Justselectyouroscillatorfrequencyandtherestisautomatic.Automaticset-levels***estimebyautomaticallysetting0dB(100%)referenceinthedistortionmeasuringmode.Frontpaneldirectionalindicatorslightwhentheinputrangesettingisimproperinsuringaccurateandrepeatablemeasurementswheredistortionasafunctionofalevel(SINAD,forexample)isdesired.Withoutthisfeature,measurementsareverytimec***umingandtedious.Whenanexternalstimulusisused,analyzertuningissimplifiedbydirectionalindicatorlightsforreachingthefundamentalnullquicklyandeasily.)