Harmonics cursors

Shows moveable cursors with a center frequency and evenly spaced harmonics.

Fourier analysis often generates a spectrum with a pattern. Periodic evens can generate a central frequency with some sidebands due to modulation.
This tools adds a number of cursors that can be dragged (using the mouse) or can be set to a specific x-locaiton (frequency) by keying in a number in an edit box. The side-band cursors can also be moved and they keep the appropriate spacing.