Then it studied the pulse waveform distortion from two aspects of the amplitude spectrum and phase spectrum.
随后从脉冲信号的幅度谱和相位谱两个方面研究了脉冲波形失真情况。
In order to facilitate the testing of the system frequency characteristics of the output requirements of moderate amplitude waveform distortion small.
为便于测试系统的频率特性，要求输出幅频特性平和波形失真小。
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