1. Home
  2. Electronics Design
  3. Nightmare over feeding multiple VGA monitors same signal but not over cables.

Nightmare over feeding multiple VGA monitors same signal but not over cables.

Any ideas on how this could be done? I thought of downconverting to composite and using a 2.4GHz video sender and cheapo LCDs but tests show quality is not up to being able to display readable text. The same LCDs have VGA input and they display the computer signal perfectly.

Is there a system that i can buy commercially that sends the VGA off a computer to say 4 'slave' VGA monitors using RF? Of course a digital encoding arrangement would be needed and conversion at the receive end. I've done a Google but not found anything. The other option would be to use your everyday network, buy four laptops and Wifi the lot together. We're only needing to display a computer screen so this would be like using a sledgehammer to crack the proverbial nut let alone my budget. Anything appreciated. Pete.

Reply to
eyemicro
Loading thread data ...

All depends on what you idea of wireless is. No sweat at all at microwave frequencies...

Reply to
cs_posting

If you stop to think what the video bandwidth is for hi-res computer monitors, you'll see why a wireless approach for a direct video link is doomed to failure.

Graham

Reply to
Pooh Bear

You could use quite cheap laptops, and the 'remote desktop' feature. You may well find it is the simplest/cheapest way of doing it. The picture quality will be better than any other system will manage. The big advantage, is the much reduced amount of data needed,compared to sending the picture... There are DVI repeater boxes, which may approach what you need, designed for HDTV. A search on 'wireless DVI', should find some of these. The big question, is what you mean by 'VGA'. The original 640*480 system, can be reproduced pretty well. 800*600, is 'do-able', with XGA, possibly being achievable, but resolutions above this, start to need huge bandwidths. A search for 'Avocent LongView', gets the nearest I know to a possible solution, which is a repeater system, using the 802.11 wireless network standard. Whether this could be used with multiple slaves, I don't know.

Best Wishes

Reply to
Roger Hamlett

Even at 2.4GHz, 300MHz bandwidth is a lot. I assume at 5GHz, the guys in this band are really happy if some other use up the full band just to save a cable.

Rene

--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
Reply to
Rene Tschaggelar

Optical would be a solution. possibly too expensive to just save a cable.

Rene

--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
Reply to
Rene Tschaggelar

The network approach is going to be the way to go as then you don't need the bandwidth that you do with sending the video, the downside being that it won't be 'real-time'. Depends on whether that's important to you. Cheap (2nd-hand?) laptops are going to be about the same(-ish) price as a LCD monitor anyway so there shouldn't be a huge price difference.

Cheers.

Ken

Reply to
Ken Taylor

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.