Amplitude modulation is to control the amplitude of signal carrier and make it change linearly with modulation signals and maintain its frequency.
幅度调制是用调制信号去控制载波的振幅，使其随调制信号线性变化，而保持载波的频率不变。
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。
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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