[SOLVED] Altium - How to create a differential pair to polygon clearance rule?

Status
Not open for further replies.
C

cpirius

Newbie level 3
Joined
Feb 8, 2012
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,300
I'm trying to figure out how to make a rule in Altium that specifies the clearance between any differential pair line and any polygon plane. I want to set the 20 mil space between trace edge and plane edge specified for PCI-E signals. The problem is that I can't figure out how to make a query that only targets differential pairs. If I could do that I could make a Clearance rule between InPolygon and "In Diff Pair" of 20 mils.

Anyone know how to do this? Or if it is possible?

Thanks
 

create a net class for your differential nets and define a rule between the netclass and polygon......
 

SHABU said:
create a net class for your differential nets and define a rule between the netclass and polygon......
Click to expand...

Yea, that is a work around. Would be nice if you could just query for differential pairs, but thanks.
 

I figured it out. You can query for differential pairs using Differential Pair Classes, and there is even a default class for all differential pairs. You can make custom class groups as needed. (Design->Classes in the PCB editor. "Differential Pair Classes" list)

Create a Clearance rule with the query:
InDifferentialPairClass('All Differential Pairs')

And:
InPolygon


 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…