Re: dvi vs vga etc and monitors.....
On 28 May 2008, at 8:17 AM, Michael Fothergill wrote:
Is it really true that if you had a very long 50 meter vga cable
the signal would degrade and you would lousy graphics resolution in
the monitor relative to a short 2 meter vga lead between computer
and monitor?
The quality of the VGA cable will certainly effect the quality of the
image, the cheap ones can look awful at any length. 50 meters is
asking quite a lot of the graphics card, and is outside the specs for
VGA (you really should get an amplifier for the VGA signal for long
runs - with good cables this works well), but it can work - depending
on the card, the cable and the monitor.
Is it also true that if you switched it for a 50 meter DVI cable
then everything would be perfect and the signal degradation would
vanish?
for long runs VGA is better, DVI doesn't work for long runs, although
there are some (very expensive) longer DVI cables around, I think the
maximum is much less than 50 meters.
Using a multicore cable with 5x video cables and an appropriate
adapter to VGA will also work well (they are usually much better than
VGA cables for long runs), but none of the other communication
between monitor and graphics card will work so everything will need
to be set manually. Note that you must use a multicore cable as the
signal paths for the 5 connections need to be identical.
When using projectors scattered around a big venue I usually try to
put the playback computers near the projectors and control them via
ethernet.
simon
Reply to: