346系列宽带噪声源是为一定频率范围内及一定剩余噪声比（ENR）内的同轴连接器类型而设计的，满足主要的测量要求。
产品比较-下变频器、噪声系数分析仪和噪声源 (特别选件)
The Agilent 346A noise source (10 MHz to 18 GHz) with a 6dB ENR is designed especially for accurate characterization of input-impedance-sensitive devices...
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The Agilent 346B noise source's high ENR(16dB), low SWR and variety of connectors make it general-purpose noise source for the range 10 MHz to 18 GHz...
The Agilent 346C noise source offers 10 MHz to 12 GHz coverage with a 16 dB ENR or 12GHz to 26.5GHz coverage with a 17dB ENR...
The Agilent 346CK01 is the ideal companion to Agilent's noise figure solutions when working on high frequency applications.