ACWWong
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gear2only is a better algorithm to use for both tran and pss. Euler introduces more numerical damping. When you say "very tight" max step, what do you mean ? I would use a max step of no less than say 100 points of the oscillation freq... (often i would use only 50) .... going overboard with harmonics and too tight with tolerances might not be too clever (as it will slow you down/increas simulation time, and the models you are by no means exact, so will be working very hard to solve very very accurately non-exactly modelled devices.)
Also when you say "Upon carrying out Tran and PSS analysis, I get a mismatch in terms of fundamental frequency...", how are you determining fundamental frequency in each case, and what magnitude is the error ? If you use tstab correctly with the same algorthm as used in tran then you do not expect any discernible differnce. For the tran i guess you are setting you dft correctly and fairly so that you would expect the same result in the first place?
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