How can I use Hartley transform or other transform (except FFT) to measure harmonics?

[Coq_Rouge]

Are you by any change using Express VIs?

[victorchoy]

About the Express VIs, I just put my waveform to FFT function and plot the result.

In this time, I just hope someone can tell me is there any other methods rather than FFT to find out harmonics. Thank you.

[Coq_Rouge]

Ok I see your problem you must scale the X-axis so the frequency bins get the correct value.  This http://zone.ni.com/devzone/cda/tut/p/id/4278 and this http://zone.ni.com/devzone/cda/tut/p/id/4541 are good intro papers to FFT in Labview. I also think the frequency scaling will apply to the Hartly transform.