Automatic Gain Control (AGC)
(Key Security Camera Specification)



Automatic Gain Control (AGC) increases the signal strength of security cameras when the light level is dim, and puts a cap on it when it is bright; this keeps the output signal consistent.

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AGC is something that is used in many different electrical circuits to boost and control signals. It is used in video and audio signals as well. AGC is probably best used in a video security camera for an indoor room that may have a little lower light than the other rooms in the building.

AGC may introduce some "noise" into the video signal as well. Noise can appear as static artifacts in the video picture that will distort the image. Adjusting the AGC becomes important to ensure you are getting the best video image possible for the given scene.

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