借助频谱分析的手段,本文研究了调频接收过程中俘获效应的机理。实验结果表明:当调频机输入端有同频干扰时,限幅过程改变了鉴频器输人信号的频谱组成。本文对限频与俘获效应的关系给出了理论上的分析,并探讨了改善调频机“俘获比”的方向。 By means of spectrum analysis, this paper studies the mechanism of capture effect in FM reception. The experimental results show that when the FM input has the same frequency interference, the limiting process changes the frequency spectrum of the input signal of the frequency discriminator. This paper gives a theoretical analysis of the relationship between the limiting frequency and the capture effect, and discusses the direction to improve the “capture ratio” of the FM machine.