Re: [BP] Dielectric Weave effects
Yea, S McMorrow et al.
The thing is, it really depends on things like material, bundle size, glass
dia. to trace width and separation, as well as the orientation and the
length of trace. To be quite honest, if skew is bad enough, it wouldn't meet
ISI levels and the eye wouldn't be recoverable. The RT of a 10G signal is
going to be on the order of 50ps. so any skew approaching this level, your
RL is going to look terrible, not to mention your S21 results. Just my
2cents
Regards
Bill
-----Original Message-----
From: owner-stds-802-3-blade@ieee.org
[mailto:owner-stds-802-3-blade@ieee.org]On Behalf Of Mellitz, Richard
Sent: Friday, June 10, 2005 1:43 PM
To: STDS-802-3-BLADE@listserv.ieee.org
Subject: [BP] Dielectric Weave effects
Hi All,
I started reviewing the draft doc and came across a differential skew
spec of 20 ps. Has any one actually measured skew on the published
backplanes?
It's possible to get up 6ps/inch skew in a pair due to bundle weave. Do
we need to address this issue?
These effects have been published before.
Rich Mellitz
Intel Corporation