pulse-amplitude modulation switching system ==> 脉幅调制交换机 pulse-amplitude spectrum ==> 脉冲幅谱,脉幅谱 pulse-amplitude-modulated carrier ==> 脉冲幅度调制载波 ..
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pulse amplitude spectrum [电子] 脉冲振幅谱
The pulse amplitude of narrow band operating approaches to that of broadband operating, it means that, the energy loss caused by narrowing spectrum is only a few.
窄带运转的脉冲幅度接近宽带运转，这意味着由于谱线压窄引起的能量损耗不大。
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。
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