Well, I must say thanks to Marc for opening this thread. I checked my scanner ground and found it NOT connected to anything... It got pulled out at some point. I had some "noise" in my images but had no idea where it was coming from. I had it at FLEM II and have basically re-wireed the whole projector and cound not get rid of it. I think I knocked the ground wire out when I wired the DT40Pros in. The "noise" was a little more pronounced, but it was there before the ground got knocked out so I did not think to look there.
Right now pin 25 is only hooked to the "ground signal" input for my scanners. They have x and y+/x and y- and x and y ground. If I read Bill's post correctly...
I have this connected wrong. Should there be three cables going to the DC ground on the scanner power supply, coming from 1)pin 25 on the ILDA plug, 2)scanner amp power ground, 3)scanner amp signal ground (I guess two cables here, one for each axis, so 4 cables in all going to the scanner power supply ground). Am I even warm with that statement?