Hi,
With regard to harmonics, I see close correlation between the FFT graph and the Harmonics Analyzer array output. Do you wish for closer correlation?
I came to this conclusion by using the zoom functions and changing the y-scale of the graph. If you set the y-scale to a maximum of 1.5 then you will see the are small peaks in the FFT at very nearly the same freqencies as shown in the array returned by the Harmonics Analyzer VI.
The Harmonics Analyzer documentation is pretty good. The question to ask is: Do you like what it does? Those results seem to make sense. They are confirmed by the FFT (as they are the result of FFT). They are easier to read than the FFT.
The results of the Peak Detector are not so good
it seems. You are operating on the output of the FFT before passing the data to the Peak Detector. Are you sure you have that part right?
I should stop trying to advise you at this point. It is clearly outside my areas of expertise. I barely understand FFT, and work with it not at all. I don't have or use LV5.1 and I am missing some components to run the VIs.
Bon chance,
Mike