But to the CW pulse signal with changing carrier wave frequency, common filter cannot achieve narrowband filter, whereas broadband filter cannot reach the request of the signal-noise ratio.

可是，对于载波频率不断变化的CW脉冲信号，普通的滤波器难以实现窄带跟踪滤波，而宽带滤波又不能达到提高信噪比的要求。

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The remote control device crystal frequency stabilization using pulse amplitude modulation transmitter, A simpler circuit, high frequency stability, launched 28MHZ are continuous carrier amplitude.

该遥控装置采用晶体稳频脉冲调幅发射机，电路较简单，频率稳定度高，发射的是间断的28MHZ等幅载波。

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Radar signal Carrier Frequency and Pulse amplitude are very important parameters in radar countermeasure and radar reconnaissance .

雷达信号载频与脉冲幅度是雷达侦察与对抗的重要参数。

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