optimization errors in awr microwave office

[sharz]

while optimizing value of capacitor in oscillator circuit,
m getting warnings such as
MinMax optimization terminated due to maximum no of cycles(OPT_CYCLES)
what does this mean?
though the optimization process continues, i get a huge no of warnings i.e. 2 warnings per iteration.
please help m new to awr microwave office

 

[BigBoss]

It means that some component optimization combinations don't give the accurate convergence to compute the oscillator frequency.
Oscillator optimization is more difficult than others because oscillators are autonomous circuits and convergence can not be obtained all the time.

 

[Osman Ceylan]

Optimization depends on the initial values that you select. I have some suggestions for AWR. At the beginning, you should not set for high resolution.
1) Limit your upper and lower values of the components.
2) Do not use high resolution (for example 0.001pF)
3) Prefer higher or lower (< or >), not equal (=)
4) If optimization is not going well at the first 5 minutes, probably your optimization technique is not proper. change it and try again
5) do not optimize more than 5 components at the same time

 

[sharz]

hello Osman ceylan
well, i m doing it exactly as you mentioned.
but still m getting d warnings
and also i want to ask, will i get the right results if i select aplac hb simulator for my simulations of nonlinear oscillator ?
or does it have to be harmonic balance simulator ?
because i get an error saying "require at least one non linear element" when i use the harmonic balance simulator.