Select Setup-> Constrants-> Electrical ... in Allegro16.6 interface into Constrant Manager interface.
Establish differential pair
open Constraints Manager, select the two networks want to set, click the right mouse button and select Create \ Differential Pair, click Create \ Differential Pair, click Create, completed the creation of a differential pair
Difference rule provided
in the enter Constraints Manager, select Differential Pair Routing under under Net Electrical under, on the right directly input constraint rules / data can,
For example: Set Tolerance.
Check whether the length of the differential line matching, selection Electrical-> Net-> Routing-> Differential Pair, select the desired isometric view of a differential pair matched ,, select Analyze right length and calculates the difference error.
