Multi-channel digital video transceiver can have a variety of functions, each type of function has corresponding technical indicators, such as video indicators, audio indicators, asynchronous data indicators, Ethernet indicators and so on.

Enough video bandwidth
Video bandwidth is an old talk about the problem. If video bandwidth is insufficient, the details of part of monitor screen is not clear enough, the horizontal resolution is low, and seriously there will be a color distortion or loss.

Apl is wide enough
Apl, that is, the average level of the image, many engineers do not pay attention or not familiar with this indicator. If apl range is too narrow, when the image signal has a large area of white, each line of image signal in the DC component increases, apl will rise, resulting in line synchronization signal amplitude is reduced or lost, the monitor can not detect the line synchronization and the screen jitter.

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