First of all, "Thanks!" to everyone who has commented so far! Your insights
have been extremely helpful.

Some additional info for things that folks have had to make assumptions
about:

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.

Right now I have got my hands on some double shielded RG-59 and looking for
some 75ohm BNCs. Our lab has a boat load of 50 ohm stuff, but one poster's
comments about the connectors being the weak link have me real concerned and
I am going to try to minimize any impedance mismatch. Unfortunately, the
video card end is a basic DB-15 (not the normal high density type used for
PC video).

Again, thanks for the help!

Don







"Don" wrote in message
nk.net...
From what I have read, RGB video cables are 75 ohm impedance. However, I
have never seen a recommendation for the RG number (or other qualifier).
I
am looking for a good quality cable as we want to go about 15ft with the
signal. (Moving a monitor from one part of our lab to another.)

Any suggestions, recommendations, links to FAQs, etc, etc will be greatly
appreciated!!

Thanks!

Don