Most modern oscilloscopes now have a DFT/FFT 1 display mode built in and that's ... These problems lead me to create a set of consistent analysis functions for Octave/MATLAB 2 that I use all the time ...

If you can’t (or even if you can), you should check out [Mehmet’s] MATLAB visualization of harmonic circles. If you don’t have MATLAB yourself, you can always check out the video (see below).

The Zoom FFT is interesting because it blends complex down conversion, lowpass filtering, and sample rate change through decimation in a spectrum analysis application ... You may be able to use a ...