[SI-LIST] Re: jitter introduced by a mated connector

  • From: "Ken Cantrell" <Ken.Cantrell@xxxxxxxxxxx>
  • To: <KKeskinen@xxxxxxxxxxxx>, <kowal@xxxxxxxx>,<si-list@xxxxxxxxxxxxx>
  • Date: Mon, 13 Aug 2001 10:43:34 -0600

Keith,
You also might consider something in addition to what Kai is talking about.
Make sure your connector(s) are rated for the frequency that you are working
at.  I ran into a legacy connector (in this case the end connector to a high
speed coax cable) that was only rated to 1 ns.  Didn't work too well at <
500 ps.
Ken

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Kai Keskinen
Sent: Friday, August 10, 2001 5:44 AM
To: 'kowal@xxxxxxxx'; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: jitter introduced by a mated connector



Keith:

The jitter introduced by the connector will be what is called deterministic
jitter which is bit pattern dependent. Do you have access to any version of
spice? You can get a pretty good idea of this jitter by running a bit
sequence through the single line connector model (obtained from your
connector vendor). Cross-talk will also add to your jitter but the
simulation gets more complicated.

Kai Keskinen
Signal Integrity Advisor
C-MAC Engineering Inc.
425 Legget Drive
Kanata, ON K2K 2W2
kkeskinen@xxxxxxxxxxx





-----Original Message-----
From: Kowal, Keith [mailto:kowal@xxxxxxxx]
Sent: Thursday, August 09, 2001 12:54 PM
To: si-list@xxxxxxxxxxxxx
Cc: Kowal, Keith
Subject: [SI-LIST] jitter introduced by a mated connector


Can some point me in the right direction regarding
the min/max jitter introduced by connectors within
a backplane system ??

- I'm looking into GBit Ethernet type
signals and wondering how many passes through connectors
The system can withstand.. .... I know this is a tough question...
I don't mind learning some new math tricks...Assume that
the signals of interest are diff-pairs / FR4 , etc...18" between
connectors (max)...

Does anyone have any experience with Diff pair signal integrity
using a QualitySemiconductor / quickswitch and passing GB diff
pair signals thru this type of device?

feel free to email me direct, if you want.


Thanks,
keith kowal
Digital Networks,
andover MA...


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