How to modify the SVXMPL_Baseband FFT (DAQ).vi to read four channels with the NI 4552

[bajaf]

Hello Community, I have been working with the NI-PCI-4552 along with SVXMPL_Baseband FFT (DAQ).vi, but this library just works for one channel, please give some directions to modify this vi and acquire signal coming from the other three channels of the 4552.

On the other hand, when I integrate in two times the signal coming from the accelerometer, with the single and double integration vi, the signals are out of phase. How can I correct or modify the integration process of the vi’s to get the right signal of velocity and position?

Thanks you community.

[BeCeGa]

Hi Bajaf, regarding the FFT of the four channels, the next link might be what your looking for:

http://digital.ni.com/public.nsf/allkb/862567530005f09c8625671b00739970

Respect the phase issue how are you doing the acquisition of the signals, are you doing two independent acquisitions? if you are controlling them as independent acquisitions try to synchronize them with triggers and the clock.

How much are they out of phase?

By the way we know have forums in Spanish

Best Regards