We use  a +\- 10 % tolerance.  This seems to meet the requirements from
engineering.

Jim Peterson - C.I.D.
Senior Cad PC Designer
[log in to unmask]
Evans & Sutherland
801.588.7210


-----Original Message-----
From: Louis T Dallara [mailto:[log in to unmask]]
Sent: Wednesday, June 27, 2001 4:27 AM
To: [log in to unmask]
Subject: Re: [DC] [pcdlist] RE: controlled impedance


Do any one know what the type tolerance is for a controlled impedance board?
+/- 1% of a 100 ohm trace??
TIA
Lou Dallara
Infincon Systems

----------------------------------------------------------------------------
-----
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV
1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To set a vacation stop for delivery of DesignerCouncil send: SET
DesignerCouncil NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
----------------------------------------------------------------------------
-----

---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------