Hello
Does anyone know what factors affect how long the DRC in the PCB Editor
takes to run?
I have a design where I have reviewed the clearance rules and netclasses. A
copy of the ddb file of the Rev. A design was made and renamed to be the
Rev. B design. The new rules were created in EXCEL, massaged with a text
editor and imported into the Rev. B design.
It took 22 min, 16 sec. for the DRC to finish on the Rev. A design. It took
10 sec. for the DRC to finish on the Rev. B design.
The Rev. A design has 19 netclasses and 40 clearance rules. The Rev. B
design has 13 netclasses and 36 clearance rules. The new clearance rules
cover more "interactions" between the various nets. The new clearance rules
also do not have any overlap where the clearance between two nets is defined
by up to 4 different rules. The rules set the clearances to 0.25mm, 1.5mm,
2.3mm, 3.0mm, 4.5mm and 5.5mm. Yes, lots of high voltages on this board.
The design has 37 nets, 76 components and 212 pads and vias on it. All the
components are passive's. The only differences between the layout of the
Rev. B design and that of the Rev. A design is that about 6 tracks were
moved slightly or narrowed slightly to get rid of some DRC violations due to
the new clearance rules.
I am using PROTEL 99SE SP3 on a 233 MHz PII with 64 MB or RAM, and NT SP4.
Thanks in advance.
Regards,
Philip So
Electronics Design Engineer
PDL Electronics Ltd
81 Austin Street
Napier
New Zealand
Phone :++64 6 843 5855 ext. 7152
Fax :++64 6 843 0603
E-mail :[EMAIL PROTECTED]
Visit our website: http://www.pdl.co.nz
The contents of this E-mail may contain information that is legally
privileged and/or confidential to the named recipient. This information is
not to be used by any other person and/or organisation. The views expressed
in this document do not necessarily reflect those of the company.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/subscrib.html
* - or email -
* mailto:[EMAIL PROTECTED]?body=leave%20proteledaforum
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Browse or Search previous postings:
* http://www.mail-archive.com/[email protected]
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
