英国TTiTF9303GHZ频率计数器TF930-3GHzUniversalFrequencyCounterFrequency,period,pulsewidth,frequencyratiodutycycle,andeventcountermodesDCto3000MHzrange,0.001mHzresolutionHighimpedancemeasurementupto125MHzACorDCcoupling,1M/50Ohmselection,polarityinvertSwitchableattenuator,thresholdcontrolNoisefilterforlowfrequencymeasurementsSelectablemeasurementtime;displayholdfunctionLarge10digitdisplaywithfullrangeofannunciatorsInternalrechargeablebatteriesforportableuseUSBinterfaceprovidesfullremotecontrolandreadbackAim-TTiTF930-3GHzUniversalFrequencyCounter技术参数：分辨率10数字型号（P）TF930宽度260mm尺寸235x260x88mm插头类型TypeC-EuropeanPlug,TypeG-British3-pin***低工作温度+5°C***大内部计数器9999999999***大输入电压30V交流/直流***大频率3000兆赫***小内部计数器1***小频率0.001Hz***高工作温度+40°C脉冲宽度分辨率20ns衰减1:1,5:1输入阻抗1MΩ，50Ω重量950g长度235mm高度88mm)