Your post is no more than usage of specific EDA vendor's simulator. There is no Design issue.
Please post to "The Designer's Guide Community Forum ≫ Simulators ≫ RF Simulators".
SiValley_designer wrote on Feb 17th, 2009, 1:43pm:I'm simulating the phase noise of an LC-VCO. Sometimes I get the following warning:
PSS analysis may be insufficiently accurate for PNOISE analysis. Consider tightening simulation tolerance.
A name of "PNOISE analysis" is not restricted to Cadence Spectre.
So you have to make it clear what vendor's simulator you use.
If you use Spectre, which solver do you use in PSS or QPSS, Shooting_Newton or HB ?
SiValley_designer wrote on Feb 17th, 2009, 1:43pm:I have tried reducing reltol, vabstol, and iabstol to much smaller values than recommended by the manual but nothing changed.
How do you set maxstep or maxacfreq for Shooting_Newton ?
If you use HB, how do you set max harmonics and oversample_factor ?