On Fri, 15 Jul 2005 02:18:05 +0000, Don wrote:

The signal is an RGB video signal with sync on green (i.e. there are only
three outputs - RGB - from the video card to the monitor.

The system is an old DEC Alpha VME system. I have not been able to dig up
any info on the video output. General consensus in the lab is that the
display is running at 1280x768, but since the system is currently down for
maintenance, no way of really checking.

The monitor is a DEC 21" VRCX1-WA with RGB and high density DB15 inputs.
Obviously, we are using the RGB inputs. The monitor it self is spec'ed at
1600x1200 at a 75Hz update rate. This should give the upper end of the
video bandwidth, but I am not sure how to convert it into an equivalent
video bandwidth in MHz.

You could look for a monitor extension cable:
http://www.google.com/search?q=monitor+extension+cable

Good Luck!
Rich