摘 要
本系统从无线通讯电路的基本组成原理出发。
关键词：发射模块；接收模块；无线通讯电路；频率
Abstract
The system from the wireless transceiver of the basic principles of the starting composition, through the major components of the system theory, function and use of research and design work produced by a single radio transceiver capable of realizing a single public voice transmission services, using FM modulation , in the 20MHz ~ 40MHz band achieved a microphone input voice signal low-power single-workers to send and receive long-distance. This circuit consists of a system to send all the way firing frequency 20MHz ~ 40MHz between the voice signal through the LA1800 chip and chip D2822, sound from the launch by the end of Cabanatuan sent to the recipient, send and receive more than 30 meters distance between the can listen to . The system has a fully functioning, stable, easy to use, high sensitivity, transmission distance and so on.
Key words: Launch module；receiver module；wireless transceiver；frequency