AI Differential Mode software settings

[apd95]

I need to use AI differential mode on NI 6014.

On the hardware side, I connect the two ends of the differential signal to pin AI0 and pin AI8.

On the software side, I am using C API provided by NIDAQmx on Linux. I looked through the C API functions and I did not find one for setting the AI differential mode.

My questions are:

1) Do I need to configure something at all on the software side? 

2) Or no software configuration is actually needed and the data from "Dev/ai0" is already the AI differential signal that I need.

Thanks a lot  

[devchander]

Hi

In NI DAQ( legacy), there was AI_ configure function call to do this.

But I have not seen what is its equivalent in DAQmx.

Do this. Find the examples mentioned in this link and you might get a code that will help you find the equivalent function call in DAQmx

also do search in development library

Hope this helps

Regards

Dev

[Tom_W_[DE]]

Hi All-

The "terminalConfig" parameter of the DAQmxCreateAIVoltageChan() function selects the AI reference configuration to use.  Allowable values for the NI 6014 are as follow: 

• DAQmx_Val_NRSE   Nonreferenced single-ended mode 
• DAQmx_Val_Diff   Differential mode 

Hopefully this helps-

Message Edited by Tom W [DE] on 07-25-2006 09:34 AM

[apd95]

Thanks! Problem solved

[Tom_W_[DE]]

Hi apd-

Glad I could help- good luck with the rest of your DAQmx experiment.