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About allegro PCB impedance workflow manager vision

ichliebedich

Hi All!

I have curious of these things below

I set the impedance value like this (about 90 ohm) with CM Rule

but, when I ran the Analysis Workflow to see the impedance with vision

despite real impedance value is about 90ohm,the maximum calculated vision value was 53.64ohm incorrectly

Do I need to set something else?

regards.

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  • oldmouldy

    The Parasitics report assumes ideal planes; the Impedance Workflow uses the Sigrity based field solvers and handles non-ideal planes; you appear to have trace segments crossing voids in the plane Shapes so there won't be "a" value for the trace impedance.

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  • oldmouldy

    The Parasitics report assumes ideal planes; the Impedance Workflow uses the Sigrity based field solvers and handles non-ideal planes; you appear to have trace segments crossing voids in the plane Shapes so there won't be "a" value for the trace impedance.

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