[PCB_FORUM] Re: Diff pair Constraints and CM
- From: "Reade, Sue" <Sue.Reade@xxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Thu, 10 Mar 2005 15:34:53 -0600
As best as I can figure this out. The "constraints" form overrides the
CM. So if you'd like all of the diff pairs to obey the same rules on all
layers, use CM first and only. If you have different gaps and widths on
different layers use "constraints". Setting gap is just one of those
things you have to do manually.
-----Original Message-----
From: Dave Seymour [mailto:deseymour-pcb@xxxxxxxxxxxxx]
Sent: Thursday, March 10, 2005 4:05 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Diff pair Constraints and CM
Fresh 15.2 design.
I assign a diff pair to two nets.
Set the diff pair spacing in the NET_PHYSICAL_TYPE = DIFF with to
11mils. Neck witdh, gap all set.
Assign the DIFF property to the nets.
Assignment table correct.
Nets route at 11mil space. Tracks obey all parameters.
Great.
How come the the 11 mil gap (etc) does not show in the CM on the DIFF
page?
Thanks
Dave
--
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560
Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297
Dave.seymour@xxxxxxxxxxxx
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