The remote control device crystal frequency stabilization using pulse amplitude modulationtransmitter, 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。
2
Here we analyzed the quality property, modulation manner and identification of various kind of transmitter with several practical application cases.
分析各类光发射机的鉴别、调制方式和质量指标特性，并举出实际应用事例。
3
Selection of active outdoor infrared detectors, active infrared transmitter sent a bouquet of the infrared beam by the modulation, into the infrared receiver to form a cordon.