Electronic Design

Basics of Design: Adaptive Equalization For Surveillance Video


There are advantages to analog, rather than Internet Protocol, technology for commercial video surveillance installations that are continually manned --  principally, that there is no latency in the stream of images.  One disadvantage is the cost of the coaxial cable needed to connect cameras with security centers.  The twisted pairs in Ethernet cable would provide an attractive alternative from a cost standpoint, except for their high-frequency roll-off. Pre-emphasis schemes have been tried, but these require an additional IC in the camera.  Adaptive equalization, that automatically handles signal reconstruction at the receive end of the cable, is now available.  Here is a discussion of its pros and cons, with examples of its capabilities. Fill out this brief form to access this important document. - Intersil





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