Community PCB Design & IC Packaging (Allegro X) PSpice POSTOL and NEGTOL for Montecarlo Analysis

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POSTOL and NEGTOL for Montecarlo Analysis

mbrusco

Hi:

I do have some components in my circuit that have an asymmetric tolerance (i.e. -15% to + 25%), I did enter these values on the POSTOL and NEGTOL fields of the property editor and left "TOLERANCE" empty, I also set "TOL_ON_OFF" to ON. However, when I run the Montecarlo Analysis I get a "WARNING(ORPSIM-15191): No Models had tolerances. MC. or .WCASE ignored

If i put values on the "TOLERANCE" fields, then the MC analysis works. So, it looks like Montecarlo only works for values on the "TOLERANCE" field and does not take into consideration values on the POSTOL and NEGTOL fields.

Is this correct?, is there a way for the MC analysis to consider different values of positive and negative tolerances? how can I do it ?

Thanks in advance

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