Pulse synchronizing signal: input device sync pulse commonly used empty contact way.
脉冲同步信号：装置的同步脉冲常用空接点方式输入。
Depending on the performance characteristics of the DC restoration circuitry within the video processing channel, some or all of the sync pulse may not be removed from the green channel.
根据视频处理通道中的直流电平恢复电路的性能，部分或全部的同步脉冲不会从绿色通道中移除。
Usually a very narrow sync pulse remains.
通常只会有较窄的同步脉冲被分离出来。
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