Voltage acquisition with NI 9206

[vincentlg]

Hello,

I'm using a NI 9206 module with a CRIO 9081 to get 14 voltage acquisition from 0.4V to 5.8V using the RSE mode.

Then i connect the 14 pin to the module from the input AI0 to AI 15. When i connect the 12 first pin, i get the good acquisition but when i connect the last two pin, the first two voltage (pin AI0 and AI8) increas from 0.4V, and this is what i don't understand.

I've tried to remove the two first input but then, the two next voltage increase as well from 0.4V.

That's why i wonder if i've forgot something, why the first input increase and if someone have already mett something similar.

Tahnk you 🙂

[crossrulz · Accepted solution]

Sounds like you are seeing a form of ghosting to me.

[vincentlg]

Yes, finally it was probably a goshting problem, then i increase the interchannel delay and it seems to work well now.

Thank you for your help !