[PCB_FORUM] Re: diff pairs

Hi Mike,

> You cannot use Constraint Manager to set up differential pairs rules for
> differential pairs that have per layer routing rules, you can only use the
> Constraint System (old form) and forgo the CM, that was the point.

I believe you can.  We do it for line width changes due to different layer
impedance.  If I remember right, I do something like set up rules for all
like rules in CM, and set the spacing rules in PDR.  Seems to work fine in
15.2 for us.  I can check in more detail if you want.

Regards,

Austin

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