Automatic gain control (AGC)

When security camera produce a quality picture , it needs a sufficient amount of light to produce a minimum stable picture, In case when the light condition is reduces to a certain level, there is insufficient light to the security camera to create a quality video picture. AGC (Automatic gain control) take action to increase the amount of amplification in these conditions to bring the video signal up to the minimum required level. Aside from increasing picture signal, AGC act as well to reduce noise and picture attenuation, and the signal to noise ratio reduced and provide quality picture, where a camera without AGC will not be able to produce a working signal.

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