高频合成信号源HP8657B厂家：美国惠普详细介绍pdf频率范围8657A:100kHzto1040MHz,分辨力10Hz(无货)8657B:100kHzto2060MHz,分辨力1Hz电平输出范围+13to-143.5dBm精度&plu***n;1dB分辨力0.1dB调制SimultaneousandmixedAM/FMmodulationmodesfrominternal(400Hzand1kHztones)andexternalsources接口GPIB<35ms频率开关速度振幅偏移可同步调节Amplitudeoffsetandphaseadjustmentcapabilities反向功率保护:50W电子衰减器0.3GMSKModulationOptionThelowresidualFMandexcellentphasenoiseperformanceofthesesignalgeneratorsmakethemidealformanyin-channelandevenout-of-channelreceivertests.The8657A/Bisaversatilesignalgeneratorofferingavarietyoffeatures,suchassimultaneousandmixedmodulationcombinati***ofAMandFM,aswellasacarrierphaseadjustcapabilitythatallowsyoutocharacterizephase-sensitivedevices.)