| 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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| Q: QAM - Quadrature amplitude modulation. Method for modulating two carriers. The carriers can be analog or digital. Quad compressor (also split screen unit) - Equipment that simultaneously displays parts or more than one image on a single monitor. It usually refers to four quadrants display. |
Courtesy of CCTV Labs and CCTV focus magazine
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