agilentN4000A 、agilentN4001A 、agilentN4002A噪声源 SNS系列噪声源与NFA系列噪声系数分析仪配合使用， 使测量设置更简便，同时增加了**度与可靠度。当与NFA系列分析仪连接时，此噪声源会自动下载电子化储存的校准数据到分析仪中，并自动测量其本身的温度以补偿校准数据。它包含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的测量应用。
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The SNS series N4000A noise source is designed for accurately measuring devices with low noise figure, with a frequency range of 10 MHz to 18 GHz and nominal ENR 6 dB.
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The SNS series N4001A noise source is ideal for general purpose use with a low reflection coefficent and a nominal ENR of 15 dB from 10 MHz to 18 GHz.
The SNS series N4002A noise source was designed to measure DUT noise figures reliable and accurately up to 30 dB from 10 MHz to 26.5 GHz.