Honeywell HD4US Configuration Manual page 10

AGC (Automatic Gain Control)
Automatic gain control adjusts the video signal strength to compensate for changes in light levels.
Select from LOW, MEDIUM, HIGH, or CUSTOM. If CUSTOM is selected, enter the AGC menu to
adjust the values for bias and limit.
Sense-Up
Sense-Up lets you adjust the frame integration to provide a clear image under low light conditions.
You can set the maximum frame integration from 2× (default) to 64×.
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