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本自动控制装置具有从8台接收机接收到的中央台以多个不同短波频率播出的相同节目信号中,自动实时地选出8路信号中相对信噪比最高的信号送发射台转播等功能。本文通过硬件、软件,对信噪比的测量、多个信号信噪比的比较及怎样选出最高信噪此的音频信号进行了一些说明。这里所述的音频信号自动选优方法,比过去的人工选择快,而且质量高。可避免人工倒换信号不及时而造成转播中断等情况发生。
The automatic control device has the same program signals that the central station broadcasts from a plurality of receivers at a plurality of different shortwave frequencies and automatically selects signals with the highest signal-to-noise ratio among the eight signals in real time, Features. This article gives some explanations through hardware and software, measurement of signal-to-noise ratio, comparison of signal-to-noise ratio of multiple signals and how to select the highest signal-to-noise audio signal. The audio signal selection method described here is faster than the manual selection of the past and is of high quality. Can avoid artificial switching signal is not timely caused by broadcast interruption and so on.