Definitions for "Video gain"
Also called video amplification, this is the increase in video signal power by an amplifier.
The amplitude of a video signal.
The nominal composite video signal level is 1V (volt). At this level, a fully saturated image is transmitted and boosting the signal offers no advantage. Most video equipment is designed to output the same 1V level video signal. In cases where the signal level has been reduced, such as after a long cable run, an amplifier with video gain may be employed to restore the proper level.