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根据频谱分析,采用自动化程序测量高频信号的信/噪比的方法比通常的人工测量法有以下5个好处:1.测量迅速,不破坏通信线路。 2.动态范围宽(大于功率计测量法),因此可以检测微弱信号。3.不用可变衰减器就能把信号和噪声区分开,因为当接收远距离发射机发出的信号时是不能用可变衰减器的。4.不必用外接带通滤波器即可求出信/噪频谱的相对密度。
According to spectrum analysis, the method of measuring the signal / noise ratio of high-frequency signals by using an automated program has the following five advantages over the usual manual measurement methods: 1. Rapid measurement without damaging the communication lines. 2. Wide dynamic range (greater than power meter measurement), so weak signals can be detected. Signal and noise can be distinguished without a variable attenuator, as variable attenuators can not be used when receiving signals from remote transmitters. 4. Do not use an external band-pass filter to find the relative density of the signal / noise spectrum.