DAM中波发射机主备双塔天线自动切换系统

DAM transmitter and antenna automatic switching system of Twin Towers

本文介绍的是一种采用逻辑电路实现中波发射机在同频主备双塔系统中的天线自动切换实用方案,主要目的是为了防止主机发射的射频信号通过备用天线倒送回备机,使得备机的功放模块损坏的情况发生。这套装置是我们根据我台的具体情况自行设计安装的。

This paper introduces a logic circuit was adopted to realize antenna automatic switching practical scheme in common-frequency primary and backup twin towers system in the medium wave transmitter. The main purpose is to prevent the radio-frequency signal launched by the primary transmitter fell back to the backup transmitter through the backup antenna, makes the power amplifier module of backup transmitter damage happens.The device was designed and installed by our launch pad based on the concrete situation.