Hello. I would like to know how to run a freq. sweep in labview. What I am trying to do is sweep from say 5hz to 2000hz at a set amplitude using the analog output on my USB-6251 device and take the FFT at each frequency using peakhold averaging. So I can see the peak dB at each frequency as it sweeps up. I have used the sweep.vi example, but it seems as though there are major discontinuitites in the sweep. It is not smooth. The freq jumps and I get very funny results. When I hook up a function generator there is no problem. I get a good FFT. Say I drive at 0dB, I get a nice flatline at 0dB at each freq during the sweep using the function genator. So what I would like to know: is it possible to get an equivalent sort of smooth, continuous sweep from the analog output of the USB-6251? If so, how would I go about this?
