[PCB_FORUM] Re: diff pair in 16.0

Hi Sam,

I setup the line widths by assigning a physical rule set to these nets, and
setting up that rule set in "setup/constraints.../Physical rule set/Set
values...", not in CM.  Note, you can set the gap/width up for different
layers which you may have to do depending on your stack-up.

I also setup a spacing rule set for my diff pairs in the same place, except
under "Spacing rule set".  Hope this helps.

Regards,

Austin
  -----Original Message-----
  From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx]On Behalf Of sjchar3@xxxxxxxxxxxx
  Sent: Monday, August 20, 2007 11:28 AM
  To: icu-pcb-forum@xxxxxxxxxxxxx
  Subject: [PCB_FORUM] diff pair in 16.0


  Group: Where do i set up the diff pairs? I'm in CM under electrical ->
Differential.

  Phase tolerance = 10 mil
  Min Line spacing =5 mil
   primary gap = 7 mil.

  But while routing I get 3 mil .

  Is the primary gap the spacing between the pairs or is it min line
spacing?

  I need 7 mil trace with 5 mil spacing.

  Thanks
  Sam

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