06-04-2008 01:46 PM
06-05-2008 09:26 AM
Update:
I've discovered the apparent cause although I don't know why it's the cause. We had disconnected the instrument on the 1520 channels in the first slot so those channels were just floating. The gains were set pretty high and the A/D was pegged on all those channels. Apparently that was causing the first two channels on the 1121 in slot 2 to also peg. No idea why. When I lowered the gains or shorted the inputs on the 1520 channels then the readings on the 1121 slot 2 channels were fine.
So lesson learned: don't leave channels floating. I'd still like to know what the root cause of the problem is.
06-05-2008 10:15 AM
06-05-2008 11:10 AM