bnc 2090 offset and other errors

[tzj]

I have a bnc 2090 plugged into a pci 6070e. The BNC is currently plugged into a DC variable power supply. Right now, when I change the voltage on the power supply, the other channels reflect this change even though it is only plugged into one channel. I have read about ghosting and even when I lower the sampling rate, the problem is not fixed. There is also an offset that is showing up on the MAX test panels and in my VI. This offset steadily decreases and seems to arbitrarily change. Whats going on here?

[TCPlomp]

See this discussion for an explanation (and get some terminators for that 2090)

Ton

[TCPlomp]

About the offset another point, I assume you use a measurment on one coax connector (+ and - in one connector), in that case your switch should be set to RSE.
In MAX this should be set as well (and in your VI) instead of the default differential measurement.

Ton