S-Video to Twisted Pair keystone adapters
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Posted by telephonesecurity.com on March 19, 2007, 11:10 pm
Please log in for more thread options I just finished a conference room, wiring from a conference table to a projector on the ceiling and to a plasma on the wall. They did not request S-Video to be run to either location (from the conference table, they do have it to a DVD player under the plasma). But since I found the ICC and Leviton S-Video to cat5 adapter plugs (keystone style), it seemed like an easy addition to through in an S- Vid connection to each location. Neither connection works. Anyone used those adapters? (they are direct connections of 4 conductors, not baluns) Before I go wild trying to troubleshoot I wonder if they have really worked for anyone. Charles | |||||||||||||||||||
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Posted by glen herrmannsfeldt on March 20, 2007, 1:05 pm
Please log in for more thread options telephonesecurity.com wrote: (snip on S-video to cat-5) > Neither connection works.
My first thought is that you really should have baluns. In the case that there was no other ground connection between the two ends, there is a reasonable chance for current to go the right way, but most often there is a ground connection. Video signals usually have a DC offset, so won't go through a transformer. > Anyone used those adapters? (they are direct connections of 4
> conductors, not baluns) > Before I go wild trying to troubleshoot I wonder if they have really
> worked for anyone. -- glen | |||||||||||||||||||
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Posted by Dmitri(Cabling-Design.com on March 21, 2007, 9:50 pm
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glen herrmannsfeldt wrote: > Video signals usually have a DC offset, so won't go through
> a transformer. They do make S-Video as well as baseband composite video passive baluns. Never looked inside one though. Should be transformers as no external power is required. Works fine. In OP's case I think the problem must have been the lengths. S-Video yields the least distance and in this un-balanced version should not have been more than 20-30 feet, if even that. Unless this was done for the benefit of laptop users having S-Video outputs, I would switch to composite video (with RCA connectors) that usually yields 75 ft or more on CAT5E. Both manufacturers make RCA keystone jacks as well. -- Best Regards, Dmitri Abaimov, RCDD http://www.cabling-design.com/ Home Cabling Guide, Cabling Forum, color codes, pinouts and other useful resources for premises cabling users and pros -- +----------------------------------------------------------+ | http://forums.cabling-design.com/ | | *** a better way to USENET *** | | no-spam Web and RSS interface to your favorite newsgroup | | comp.dcom.cabling - 3164 messages and counting! | +----------------------------------------------------------+ | |||||||||||||||||||
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Posted by scolio on March 22, 2007, 9:53 pm
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>
Don't know if you're just putting the s vid on as an extra or not, however, a
higher quality signal will be carried through the VGA or RGB than will an s vid. Since the signal is being displayed on a plasma, a higher grade signal may be desired. Just a thought. | |||||||||||||||||||
