I double checked when I got home tonight and can confirm that I cannot get any response from the undulator on the sine setting. I used every other shape and got the effect (fairly weak on the triangle setting, very vigorous on every other shape) – I hit the unit with a much stronger input signal, still nothing . . . I'd be much more willing to beleive it was user error, except it works so well with the other waveforms . . . seems odd.
