A/D Converter

A circuit which converts a signal from analogue to digital form; the opposite of a D/A converte

Adobe

A software manuafacturer based in San Jose, California, and traded on the Nasdaq National Market under the symbol ADBE. Adobe is a leading provider of media productivity software.

AGC

Automatic Gain Control. A circuit which automatically adjusts the input gain of a device, in order to provide a safe and consistent signal level. AGCs can be handy features, but professional applications often require manual gain control for optimum results.

AM: Amplitude Modulation.

A method of radio transmission which sends information as variations of the amplitude of a carrier wave.

Amperage

The amount of electrical current transferred from one component to another.

Amplifier

A device which increases signal amplitude.

Amplify

To increase amplitude.

Amplitude

The strength or power of a wave signal. The "height" of a wave when viewed as a standard x vs y graph.

Analogue

Information stored or transmitted as a continuously variable signal (as opposed to digital, in which the analogue signal is represented as a series of discreet values). Analogue is often technically the more accurate representation of the original signal, but digital systems have numerous advantages which have tended to make them more popular (a classic example is vinyl records versus CDs).

Anamorphic Lens

A special type of wide-angle lens which stretches the width of the image but not the height, creating a widescreen aspect ratio.

Antenna

A device which radiates and/or receives electromagnetic waves.

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