wodp Posted December 29, 2003 Share Posted December 29, 2003 I saw somewhere a bit of kit that was using CAT5e cable to send vga signal to a plasma display. I saw a different one in a catalouge but forgot to note where I found it - oops. Anyhow, I'm interested in where to get one (doesn't need to be IP based - I'd only want to use one run of cat5 for the video feed) where you have an encoder with composite video and vga inputs and several decoders daisychained together to relay it to several outputs (again, vga and composite, mebbe svideo). If anyone knows of where I can obtain this stuff from (preferably with accompanying site with prices and specs) please reply. Thanks, Dave Link to comment Share on other sites More sharing options...
johnb Posted December 29, 2003 Share Posted December 29, 2003 Kramer do a whole host of convertors for sending video or vga over either a single twisted pair or a standard cat 5 cable. I think that some of the recievers have loop thorughs allowing one transmitter to feed more than one reciever. Kramer Twisted Pair Interfaces Link to comment Share on other sites More sharing options...
Matt Posted December 29, 2003 Share Posted December 29, 2003 its perfectly easy, if you can get the pin layouts for the vga plug (RGB etc...) you can wire up one end of the cat5e cable to that, and put the seperate component rca connectors on the other end, and run it like that form your source... we do it at work, 3 or 4 screens chained with cat5e cables... it isnt as good as a pre-made cable jobby from one of the high end manufacturers, but most people dont really notice it... Link to comment Share on other sites More sharing options...
Rikio Posted December 29, 2003 Share Posted December 29, 2003 There are also some adapters on page 380 of the Canford Source I have in front of me. A basic VGA to one monitor costs £252 and the max length of the CAT5 is 105m Intelix CAT5 VGA2 Link to comment Share on other sites More sharing options...
Matt Posted December 29, 2003 Share Posted December 29, 2003 hmmm 105m? I would have thought it been 100, although that is the max length of cat5e cable allowed on one stretch without a repeater... according to the cisco course I am on Link to comment Share on other sites More sharing options...
Rikio Posted December 29, 2003 Share Posted December 29, 2003 105m is what is printed. Some of their other products that convert audio and composite video to CAT5 have a maximum working distance of 750m!! Link to comment Share on other sites More sharing options...
Matt Posted December 29, 2003 Share Posted December 29, 2003 the audio works at a much lower frequency though... but still the cancellation effect of the cat5e cables, twisted to reduce interference between wires... oh well, I'm sure they know what they are doing <_< Link to comment Share on other sites More sharing options...
Pete Alcock Posted December 29, 2003 Share Posted December 29, 2003 Dave, You need to be clear whether you want to send your video signal to the plasma screen or projector as RGB, VGA or composite video. Each of these standards poses a different challenge. Composite video is easiest as the video signal just needs balancing and equalising, and you can happily send it over 300m of CAT 5 no problem. RGB is more tricky as the different twists in CAT 5 can affect the RGB differently, so the equalisation is more complicated. The company in the UK that specialise in this kit is Scion Technology, based near Reading. They do everything from simple senders and transmitters built into SCART plugs, that literally plug into the DVD and plasma and send the audio and video over CAT 5, right through to rack mounted multi-channel matrices and distribution kit. Their web site is here: Scion Technology Dave Brown is the MD, and you can mention my name, provided it's a serious enquiry. They are EXPERTS in this field. All the best, Pete Alcock. Link to comment Share on other sites More sharing options...
Ike Posted December 29, 2003 Share Posted December 29, 2003 hmmm 105m? I would have thought it been 100Looks like somebody is still working in feet. :huh: Link to comment Share on other sites More sharing options...
Matt Posted December 29, 2003 Share Posted December 29, 2003 I'm not working in feet, if you had read the rest of the post I was on abbout computer networking, the maximum distance between repeaters is not to exceed 100m as laid out by TIA/EIA, OSI, ISO, IEEE* standards, accoridng to my cisco ccna course *delete as appropriate, for I cant remember which one, if any hmmm 105m? I would have thought it been 100, although that is the max length of cat5e cable allowed on one stretch without a repeater... according to the cisco course I am on not beingone to quote myself, but hey... Link to comment Share on other sites More sharing options...
Ike Posted December 29, 2003 Share Posted December 29, 2003 105m is 350' rounded off and is the quantity in which cat5 is often sold in (by american companies at least) and so it is possible that the recommended maximum lengths are based on this Edit: and for the pedant 350' actually equals 106.67999929591201...m Link to comment Share on other sites More sharing options...
Matt Posted December 30, 2003 Share Posted December 30, 2003 ok, dont think ike got the point,I was on about computer networking requirements, but also ading the point in that I thought that due to the nature of that particular twisted pair cable, it might cancel everything out. in the uk it is sold in reels of 500m I think. oh how I love to work in feet and inches... the best way I say :huh: Link to comment Share on other sites More sharing options...
Brian Posted January 1, 2004 Share Posted January 1, 2004 ok, dont think ike got the point,I was on about computer networking requirements, but also ading the point in that I thought that due to the nature of that particular twisted pair cable, it might cancel everything out. in the uk it is sold in reels of 500m I think.most US made/branded cable is sold in 305m boxes (=1000ft). Link to comment Share on other sites More sharing options...
tuxlux Posted January 4, 2004 Share Posted January 4, 2004 I'm not working in feet, if you had read the rest of the post I was on abbout computer networking, the maximum distance between repeaters is not to exceed 100m as laid out by TIA/EIA, OSI, ISO, IEEE* standards, accoridng to my cisco ccna course *delete as appropriate, for I cant remember which one, if any hmmm 105m? I would have thought it been 100, although that is the max length of cat5e cable allowed on one stretch without a repeater... according to the cisco course I am on not beingone to quote myself, but hey...its only a (approx)100m limit for specific applications e.g. ethernet- it depends how the signals are driven. Obviously if you drive signals with enough voltage, and ensure they don't change too quickly you can get away with any length of wire. Sending plain VGA may or may not work at greater than 100m, however with a box of tricks it (with appropriate drivers) its not a problem. - Specialist devices will be designed (hopefully ;)!) to overcome any problems DMX over cat5 for instance can have some very long lines ok, since its a fairly slow (compared to ethernet) data rate, and is suited by twisted pairs. Link to comment Share on other sites More sharing options...
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