| The Glossary An all inclusive glossary of security lingo is provided for your convenience. This list will undoubtedly be helpful when delving in to the realm of security. |
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| U: UHF signal - Ultra high frequency signal. In television it is defined to belong in the radio spectrum between 470 MHz and 850 MHz. Unbalanced signal - In CCTV, this refers to a type of video signal transmission through a coaxial cable. It is called unbalanced because the signal travels through the center core only, while the cable shield is used for equating the two voltage potentials between the coaxial cable ends. Under scan - Decreases raster size H and V so that all four edges of the picture are visible on the monitor. UPS - Uninterruptible power supply. These are power supplies used in the majority of high security systems, whose purpose is to back-up the system for at least 10 minutes without mains power. The duration of this depends on the size of the UPS, usually expressed in VA, and the current consumption of the system itself. UTP - Unshielded twisted pair. A cable medium with one or more pairs of twisted insulated copper conductors bound in a single sheath. Now the most common method of bringing telephone and data to the desktop. |
Courtesy of CCTV Labs and CCTV focus magazine
Copyright © 2004-2006 Sun Surveillance Inc. / We put the Sun to Work for You!
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