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usb (6211) DAQ frequency question

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Hello,

I'm a newbie when it comes to NI and DAQ. I've purchased a NI USB 6211 and connected a resolver with 400 hz to ai1 and ai2 (RSE) (sine and cosine signals). I also have the reference signal from the power supply connected to ai3 (differential). Voltage deviders give me a +/- 2.5 Volts input signal from all sources.

The problem is that the signal shifts to the right. It evenly shifts for all signals.

I'm now wondering whether it's possible to synch the input signal  so that it doesn't shift? or do I have to programmatically solve this issue ? I'm programming in C with the standard DAQmx  drivers (v15.1). But I've seen the same issue with Labview and Measurement Studio.

 

Thanks in advance for any suggestions.

 

Kind Regards,

 

Gerhard

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Accepted by topic author crashdog

I guess I just found the answer to my question here:

http://forums.ni.com/t5/LabVIEW/DAQ-Assistant-can-t-lock-the-signals/m-p/1332484#M542285

I guess I need to ask in the C++ forum section for an example of a software lock.

 

Regards,

Gerhard

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