Terminology Compilation

AC Power Alternating Current Power. In the United States, the standard AC Power is single-phase 117VAC/60Hz and is provided from power outlets in the house. 24V AC power can be produced from an AC Adapter.
Alarm Sensor

Like Video Motion Detector, detects changes of motion to produce an alarm.


A procedure employed to eliminate or reduce (by smoothing and filtering) the aliasing effects.

Auto-Focus Lens

Automatically adjusts the lens focus from surrounding scene and keeps a moving object in focus.

Automatic Gain Control (AGC)

This is a feature of many CCTV cameras that helps keep the strength of the output signal constant, even when the light level changes. In other words, it boosts the signal strength at low light levels, and caps it at higher levels.

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