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我们在装置调频发射机的过程中,需要对调频信号的参数进行测量,调频信号的基本参数是调频指数和频率编移,通常知道其中一个就可以求出另一个。我们对几种测量方法进行了试验和比较,认为用频偏计来测量是最方便而且准确的。一、测量频率偏移的几种方法测量调频信号频率偏移的方法很多。通常有示波法、频率计法、频偏计法和中心频率另值法。其中,中心频率另值法是有缺点的:它只能测量较大调频指数的调频信号,而且
In the process of installing the FM transmitter, we need to measure the parameters of the FM signal. The basic parameters of the FM signal are the FM index and the frequency offset. Usually one of them can find the other one. We have tested and compared several measurement methods and concluded that it is most convenient and accurate to measure with frequency offset meter. First, several methods of measuring frequency offset Measuring frequency of FM signal frequency offset many ways. Usually oscillometry, frequency meter method, frequency offset meter method and the center frequency of the other value method. Among them, the center frequency of the other method is a disadvantage: it can only measure the larger FM index FM signal, and