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低频信号的频率测量有两种方法:一种是测量低频信号的周期T,再求T的倒数,便是信号的频率;第二种方法是利用倍频电路,将低频频率扩大100倍、1000倍甚至10000倍,再用普通频率计计数显示。
There are two ways to measure the frequency of the low frequency signal: one is to measure the period T of the low frequency signal and then the reciprocal of T, which is the frequency of the signal; the second method is to multiply the low frequency by 100 times and 1000 Times or even 10,000 times, then the normal frequency meter count display.