hello, i'm working with smt for the first time, and the board has 576MHz piped onboard thru a coax, so some signal integrity issues arise.
i've established a stack that will give me a controlled impedance, and after laying a few critical lines by hand, i want to allow autorouting to complete the board. to avoid added inductances, i want the vias within 10 or 30mil of the pads, but when i autoroute, its placing them almost 100mil away from the pads. my problem is that i would like to set a design rule to allow a MAXIMUM distance from the pad to a power/ground via, but the smd-to-plane constraint is a minimum length. is there a rule (or other method) i can use to constrain the maximum trace length to a plane via during autoroute? thank you, miker p.s. to mr. lomax. the suggestion about using the edit/move/ component and then clicking an empty space to get a parts listing was a lifesaver. as you could tell, i had been doing a find and then having to travel back to where i wanted to drag it. thank you. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
