IntroductionWith the world dominance of personal computer systems,demand for long distance component video transmission isincreasing at an unprecedented pace. The applicationsareas of greatest demand are KVM systems, server farms,information message boards and educational classrooms.This application note provides in-depth information on someof the most important physical support technologies andconstraints; CAT-5 cable characteristics, SXGA videostandards and video amplifier/line drivers and receiverbandwidth and slew rate requirements. The trade-offs ofdifferential line driver and receiver topologies are discussedin detail. This application note also presents terminationtechniques and video equalization strategies. Further designissues involving power supply schemes and video timingtransmissions are also also described.The goal of this application note is to present the most currentdesign methods for transmitting high bandwidth SXGA videosignal over long distances of CAT-5 cable (300m or more). Theenormous cost benefits of CAT-5 cable will also be discussed;for instance, the average cost of a 100m of CAT-5 cable is $20while the average cost of a 100m of Coax Cable could easilyexceed $240. Furthermore, wiring is reduced from a bulky hardto manage bundle of 3 cables to 1 easily pulled cable.Additionally, CAT-5 cable has a 4th twisted pair available, whichcan be used for KVM signal, audio, timing or control signaltransmission.
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