交调失真的不对称性描述了功率放大器的记忆特性，但是与幅度相比，交调分量的相位特性很难测量。

Asymmetries of intermodulation distortions describe the memory effect of power amplifiers (PAs), but it is hard to measure asymmetries of the phase of the IM components.

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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。

Then it studied the pulse waveform distortion from two aspects of the amplitude spectrum and phase spectrum.

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