Maker Pro
Maker Pro

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.
 
P

Pooh Bear

Jan 1, 1970
0
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.

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
 
R

Roger Hamlett

Jan 1, 1970
0
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.
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
 
Pooh said:
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.

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

Rene Tschaggelar

Jan 1, 1970
0
Pooh Bear wrote:




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

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
 
R

Rene Tschaggelar

Jan 1, 1970
0
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.

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

Rene
 
K

Ken Taylor

Jan 1, 1970
0
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.

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
 
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