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两个调频信号同时加到限幅器输入端时,输出信号的频率不是常量。本文用计算输出信号的瞬时频率来对捕捉效应作一个理论说明。这个信号加到一个带宽不受限制的解调器上时,解调器的输出信号证实有一个极大的捕捉效应。只要限制了解调器的带宽,捕捉效应就表现得不那么厉害了。本文解释了这个现象,并提供了使捕捉效应减到最小的可能性。本文提供了在限幅器和解调器上测量的一些结果,它们证实弱捕捉效应是可以获得的。本文还包括一个计算捕捉程度的方法。
When two FM signals are added to the limiter input at the same time, the frequency of the output signal is not constant. In this paper, the instantaneous frequency of the output signal to capture a theoretical explanation. When this signal is applied to an unrestricted demodulator, the output of the demodulator proves to have a very large trapping effect. As long as the bandwidth of the demodulator is limited, the capture effect does not perform as well. This article explains this phenomenon and offers the possibility of minimizing the catching effect. This article provides some of the results measured at the limiter and the demodulator, which demonstrate that weak trapping effects are attainable. This article also includes a method of calculating the degree of capture.