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Products & services > Product catalogue > Glossary

Glossary

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V.B.S. (Video,
Burst, Sync)
A composite colour video signal.
V.H.S. (Video Home
System)
Name given to 1/2" tape format domestic video recorder.
V.S. (Video Sync) A composite monochrome video signal.
Varifocal A type of lens which enables a manual selection between two focal lengths to give the desired picture view.
Vertical Interval
Switching
Sequential switchers waiting until the current field has finished before they display the next camera, even though the dwell time has elapsed.
VEXT A multiplexer feature that uses a pulse generated by the VCR so that the multiplexer automatically adjusts to the VCR time lapse speed.
Video Motion
Detection (V.M.D.)
A system that uses the video signal from a camera to determine if there is any movement in the picture and set of an alarm.
VLAN (Virtual LAN) Devices on a LAN or LANs that are configured for communications as if they were attached to the same wire, when in reality they are located on a number of different LAN segments.
VXA Cost effective digital tape media.



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4T2Copyright © 2012 Norbain SD Ltd: updated on Feb 1 2012