Hi all,

I am currently simulating the phase noise of a current-controlled oscillator (beat frequency 1GHZ).

As explained in the spectreRF docu, I adjust the
reltol, vabstol and iabstol values so that my beat frequency shows the demanded accuracy.

For the pnoise simulation two additional parameters can be specified: relative harmonics and maximum sidebands.

*relative harmonics: docu says use a reasonable numer (e.g 10). But in our simulations I see a hugh difference if I increase this value up to e.g. 40??

*maximum sidebands: docu says to start e.g. with 7 an increase this value up to the point when the pnoise settles.

Can anybody explain the meaning of both parameters?!

Exist a procedure to find the "optimal/realistic" setting for both parameters to assure a certain simulation accuracy

Thx
Friedel  ;D