"Alfred" wrote in message
...
On Mon, 6 Oct 2008 17:23:03 +1300, "PeeCee" wrote:
snip

I used to make up VGA cables for control room applications. 15M using
individual screened conductors was about the recommended limit



mmm wouldn't surprise me.
I've seen VGA extension cables as short as 2M exhibit ghosting.

P.

"PeeCee" writes:

"Alfred" wrote in message
...
On Mon, 6 Oct 2008 17:23:03 +1300, "PeeCee" wrote:
snip

I used to make up VGA cables for control room applications. 15M using
individual screened conductors was about the recommended limit



mmm wouldn't surprise me.
I've seen VGA extension cables as short as 2M exhibit ghosting.

There are well built VGA extension cables (use 75 ohm mini coax cables
at least for RGB signals). Those work generally well.
Also there are those crappy cables built just from general purpose
computer cable with lots of wires inside one outer shield. Those
cheap cables have typically wrong impedance and considerable
crosstalk between signals - ghosting problems

Then the used resolution + refresh combination has effect.
Almost any crapphy cable works for 640x480 60 Hz resolution
but for 1280x12o4 and higher resolutions the quality of the cable
starts really slow up.

--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/