How to Reduce DRC for High speed transition via anti-pad

why do you have to add route keepout to the shape, in Allegro Global dynamic shape parameters we have a option to add combined voids for differential pairs.

Hello SandeepVarrier,

We have a specific requirement for this project. We need to have a shared anti-pad only for the high speed differential signals. Moreover, the clearance between the via and the shape should be 10 mils for these signals, and 5 mils for the rest. Is it possible to set this using the Global dynamic parameter? If so, could you please explain how to do it?
I am using OrCAD 22.1 PCB editor

Regards,
Jithindev

1. With an OrCAD license you will have to use the keepout shape you have done but you can add properties to the shape. Try Edit - Object Properties then click on the keepout shape and add via_allowed or routes_allowed. There is also some options in Constraint Manager under the properties net pane to create specific groups of nets that are allowed in the shape. Look at parsyseda youtube channel for a route keepout video which should help, There is more capability if you have Allegro and High Speed options that are simple to set up.

when we use properties via_allowed or routes_allowed, we will face other issue that other trace it will be through this void cause SOV and did not alert DRC. We must to check it by SOV. I think it take a lot time

So you can use the Constraint Manager to only allow certain nets in each keepout. Take a look at the video I mentioned which will tell you how to use this capability.