Thank you very much for the information. What your describing is what we are thinking specific to this problem.
In the current Expedition PCB our automatic tuning functionality will match net lengths for DiffPairs. However some customers would like full control of matching the individual legs of the DiffPair. In 2007.8 we will provide users an option to disable automatic matching of the legs of the DiffPair allowing the user to use Dynamove or Smart Utilities to manual add the additional length for matching.
Specific to Smart Utilities Dynamic Tune, I have put an AVI file at
This AVI shows how to setup the GUI in order to get a Sawtooth pattern.
ExpeditionPCB/XtremePCB Product Marketing Manager
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i find the link below very helpful for everyone especially those who are encountering problems about Length matching within a differential pair.