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Differential Pair Via Spacing

Sagetech

When routing a differential pair and transitioning to another layer, the via spacing is wider then I would expect. 

For example, I have the diff pair trace to trace spacing set for 0.3mm but the vias are being spaced 1mm apart. I have the via to via spacing set to much less then that in CM.

Where should I look for a setting that controls the via to via spacing on a diff pair?

Tom

PS Using 16.6 S102

  • Sagetech

    I believe I just answered my own question - while routing the diff pair RMB, then select via pattern>spacing the settings are available there.

    Interesting these settings don't seem to be available from CM unless I'm missing something.

    Tom

  • steve
    in reply to Sagetech

    This is possible with the Allegro + High Speed option and the latest QIR for 17.2-2016 (s037). There's a video showing how to set this up https://www.youtube.com/watch?v=8P2ytJ8Y6vI&t=27s

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