All,
Our new designs have a lot of differential pairs running around our boards and I want to communicate this clearly to the board house so they can adjust tracks to their process to maintain impedance control. We use the ODB++ functionality to communicate the physical board. I have looked though every file inside the ODB++ file and i see nothing that can be interpreted as netname + impedance value + on this layer information. I have looked through the entire interface of Allegro and see nothing that can do this.
So, my question is, how can i extract this information from our finished Allegro design and commuincate it in an effective and useful manner?
Robert.