美国JFW50FHC-030-50DC-4GHz50W30dBN型射频微波同轴高精密固定衰减器***资料http:///images/products/secondary/gFrequencyStartDCFrequencyStop4GHzRFInputPower50WattsAttenuation30dB(DC-4GHz)HeatsinkStyleRoundRFConnectorsN)