[SOLVED] ADS Schematic Monte Carlo Simulation; Positive value for S12

[noori.re]

Hello everyone,
Im doing Monte Carlo simulation on ADS schematic. I used Murata libray for non-resistive parts and for resistive parts I add the tolerances manually.
Every thing seems ok.
I run the MonteCarlo simulation of 5000 iteration.
In my results I got positive value for S12 and S21.
Is something run from my side or is it normal to get positive value in the MonteCarlo simulaiton?

How can I rely on this results when it gives some positive values for S12/S21?
Thanks

 

[volker@muehlhaus]

Positive insertion loss = gain for a passive component means your model and results are wrong.

You wrote that you added tolerances manually, so maybe you added them to the wrong model elements and allow negative resistance?

 

[noori.re]

Thanks for the hint.
The reason was that the value of resistor was becoming minus.
KOhm is not working! just 1000 Ohm.