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Constraint Manager Analysis Error (Allegro PCB Designer 17.2)

Acheson760

I have created a set of constraints for differential pairs in the 'Electrical Constraint Set', and established several sets of differential pairs. Whenever I right click and Analyze a set of differential pairs the boxes I am expecting to fill with 'Actual lengths' and 'Margin' for 'Uncoupled Length' and 'Static Phase' are instead just turning yellow and not being filled with any information. This function works on other designs, but does not on this one. Does anybody have any suggestions why this might be happening?

Thanks.

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  • steve

    The diff pair is not 100% routed and until it is it won't show any values. This could be an unplaced component that is part of the diff pair or part of an xnet through a series or termination discrete part. If the latter is the case and you don't want that as part of the diff pair add a property to the discrete part called NO_XNET_CONNECTION with a value of true.

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  • steve

    The diff pair is not 100% routed and until it is it won't show any values. This could be an unplaced component that is part of the diff pair or part of an xnet through a series or termination discrete part. If the latter is the case and you don't want that as part of the diff pair add a property to the discrete part called NO_XNET_CONNECTION with a value of true.

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