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

Hi Keith:
 
I don't have time to look up the part number but it sounds like a simple pin
header. Amp/Tyco do have some pretty good SI people on board who might be
able to answer your question. Call your local Tyco rep with your specifics
plus check out their web site for who to call/e-mail.
 
Good Luck

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: Monday, August 13, 2001 2:29 PM
To: 'Ken Cantrell'; KKeskinen@xxxxxxxxxxxx
Cc: Kowal, Keith; si-list@xxxxxxxxxxxxx
Subject: RE: [SI-LIST] Re: jitter introduced by a mated connector



thanks for getting back to me.   The connector we would like to 
use is a 3-row 16-pin per row totalling 48 pins... / standard amp 
#650489 ,0.1" centers etc. ,, legacy connector for sure! Do I have any hope?

  I don't think I can get a rating from AMP, I'll try but I doubt it. 
Since this is a legacy based product , it's not ideal coax nor a very 
good grounding schema too...  would a card edge be better/ like an AGP style
connector? 


Keith Kowal 
Digital Networks, LLC   (formally DEC!) 




-----Original Message----- 
From: Ken Cantrell [ mailto:Ken.Cantrell@xxxxxxxxxxx
<mailto:Ken.Cantrell@xxxxxxxxxxx> ] 
Sent: Monday, August 13, 2001 12:44 PM 
To: KKeskinen@xxxxxxxxxxxx; kowal@xxxxxxxx; si-list@xxxxxxxxxxxxx 
Subject: RE: [SI-LIST] Re: jitter introduced by a mated connector 


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 <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 <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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