Glossary

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Term - G

Gamma :

Degree of contrast in a video picture between output magnitude and input magnitude.

GB :

Gigabyte.

Genlock :

A device that adjusts the frequency of internal sync to an external data.

Ghost :

A shadowy or weak image in the received picture, offset to either the right or to the left of the primary image.

Gate :

Typically, a door that is outdoors.

General Protection Fault :

An operating system fault that occurs whenever a program executes a command that the operating system considers dangerous to the operating system. When a GPF is generated, the program that generated the GPF is closed and control is returned to the operating system.

Global Unlock :

A normally-open input that, when closed, generates a signal that unlocks all doors in the access control system.

Ground :

1) An electrical connection with a ground potential point.
2) An electrical connection to a circuit's zero voltage reference point. See Earth Ground.

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