AS,

1) Have you run a transient and plotted frequency versus time
   to verify that there is as long settling time?
2) How are calculating the initial conditions?

                                                                 Sheldon

AS,

 No, I was referring to the initial conditions option in the oscillator
analysis section. It was intended to speed up convergence for high
Q oscillators, for example, crystal oscillators. Have you considered
using harmonic balance analysis. Tested both analyses for a ring
oscillator and the results matched. Used a a lot of tones for HB
analysis, ~100 tones, that may be more than you will need.

                                                                      Sheldon