Degree of contrast in a video picture between output magnitude and input magnitude.
A device that adjusts the frequency of internal sync to an external data.
A shadowy or weak image in the received picture, offset to either the right or to the left of the primary image.
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.
1) An electrical connection with a ground potential point.
2) An electrical connection to a circuit's zero voltage reference point. See Earth Ground.