s-video over cat5

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 Question by Rudy Landa posted 30 Sep 2003
 s-video over cat5
I have a polycomm videoconferencing unit pushing out s-video for projector use. The configuration would be a 20' s-video cable going from the Polycomm to an s-video bulkhead connector to the wall. The run from the wall to the ceiling projecter would be 32'. The s-video cable run from the wall to the projector has not been installed yet. My understanding is that if I have high quality s-video cables, the 52' run should not be a problem for signal loss (other than what the s-video bulkhead may cause). Would running s-video signal over cat5 wiring using an s-video to cat baluns be just as good as using straight s-video cable? Would there be a visible difference in quality?

 Answer by Dmitri Abaimov posted 08 Oct 2003
Dear Rudy,

Using baluns over CAT5 cable would make the signal even better (when running considerable distances). The balun, by balancing the signal, makes it less susceptible to EMI. However, I do not think 50-some feet will be a problem either way. Actually, you don't even need a balun for 52' run. Ortronics makes a nice passive (Straight-through, no balun) faceplate insert for S-Video. Just grab one from your cabling parts source.
It's just so much easier to install CAT5 cables than any of the specialty cables, such as S-Video, because of the (bulky) connectors that are usually installed on both ends.

Dmitri Abaimov, RCDD

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