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首页> 外文期刊>Electrical Engineers - Part IIIA: Radiolocation, Journal of the Institution of >The Design of Signal Generators for the Measurement of Receiver Noise Factor at 10- and 3-cm Wavelengths
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The Design of Signal Generators for the Measurement of Receiver Noise Factor at 10- and 3-cm Wavelengths

机译：用于测量10厘米和3厘米波长接收器噪声因子的信号发生器的设计

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The design of signal generators for the measurement of receiver noise factors at 10- and 3-cm wavelengths is described, one of the main points being the elimination of connectors which give unreproducible results. To achieve this, the monitor and attenuator are made integral parts of the signal generator; the signal emerges through a length of Pyrotenax cable of over 10 db attenuation, giving a resistive output. The signal generator is calibrated by measurement of the power output when the piston attenuator is set to low attenuation but still obeys the theoretical law. Known power outputs of the order of 10????????14W may thus be obtained with an accuracy of ???????± 1 db. The screening is such that no leakage can be detected with the most sensitive receivers.
机译：描述了用于测量10厘米和3厘米波长接收器噪声因子的信号发生器的设计，主要要点之一是消除了连接器，这些连接器给出了无法再现的结果。为此，将监视器和衰减器作为信号发生器的组成部分。信号通过一条衰减量超过10 db的Pyrotenax电缆出现，从而提供电阻性输出。当活塞衰减器设置为低衰减但仍遵守理论定律时，通过测量功率输出来校准信号发生器。因此可以以±±1db的精度获得10××14W量级的已知功率输出。这样的筛选使得最敏感的接收器无法检测到泄漏。

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