GM338电台接口中的音频通道分析

Analysis of Audio Path in GM338 Radio Interface

在GM338电台接口中,有两个音频信号输入脚,一个音频信号输出脚。音频信号输出脚可以通过软件选择连接两个音频信号之一。定性分析认为,发射语音信号时,使用J0501-2脚;发射特定频率的音频信号时,使用J0501-5脚。如此,方能保证电台接收信号信的噪比和相对发射信号不失真。

There are two audio signal input terminals and one output terminal in GM338 radio interface.The output terminal may be connected to one of two audio signals with the help of the software.Qualitative analysis shows that J0501-2 terminal is used when voice signal is sent,while J0501-5 is used when voice signal with a particular frequency is sent.In this way can the best signal to noise ratio of receipt signal and the true transmitting signal be guaranteed.