sheldon
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Ixie,
You are performing a Periodic Steady-State analysis, PSS. This analysis finds the steady state response of a circuit over the user defined periood. In your case, the period is 1/960MHz, or 1.04167ns. A PSS analysis is looking for the steady-state response. SpectreRF iterates using the Shooting Newton algorithm to find the circuit's steady-state response to the periodic input. Please look in the SpectreRF Theory of Operation for more details.
There is only one solution. The algorithm first makes an estimate of the steady-state using transient analysis and then iterates to refine the estimate. In your case three iterations were required. If you look at the end of the run there is a report on how close the algorithm is to converging.
If the algorithm is not converging it will require many iterations. So it sounds like PSS is working correctly and PSS is converging. Can you plot the PSS results?
Best Regards,
Sheloon
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