Mitch, according to your first post it sounds like you already have a test environment with lots of RF interference. Maybe you could make up a shielded cable and run it along with the cable provided by URC. Without moving the cables much, maybe you could simply unplug one cable and plug in the other and let us know what results .

I've had excellent success with the supplied cables but if/when I run into this issue I already have a nice shielded cable made up that I will be trying out.

If you can try other cables in the above environment, please let us know. I, for one, am interested in what would happen.