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前言在光纤视频传输中,为了实现不中断地可靠工作,发射机或接收机中常常设计有主通道或备份通道,一旦主通道发生故障机器便自动倒换备份通道工作。本文所叙述的是一个视频接收光端机视频信号自动切换电路。它可以切换一路视频信号,与继电器组合还可切换四路音频信号。它具有自动切换、自动复原、稳定可靠、易于装配调试的特点,可与各类视频、音频信号的模拟光端机或电端机相连接。
Preface In optical fiber video transmission, in order to achieve uninterrupted and reliable work, transmitters or receivers are often designed with a primary channel or a backup channel. Once the primary channel fails, the machine automatically switches the backup channel. Described in this article is a video receiver optical video signal automatic switching circuit. It can switch all the way video signals, and the relay combination can also switch four audio signals. It has automatic switching, automatic recovery, stable and reliable, easy assembly and debugging features, with a variety of video and audio signals analog optical or electrical terminal connected.