Re: [BP] Interference tolerance test channels
Title: Message
Folks,
OK, here is some initial comparison data
(attached).
Basically, the 1 m FR408 channels are right on
the hairy edge and fall through at large frequencies. Looking at this, I am
fairly sure the similar 1 m Nelco 4000-13SI would pass. I will check later,
don't have the Nelco backplane handy. Also, I have included a 30" FR408 channel
- orange line, - (it's not in the library, but I have the files if anyone
wants it), it's comfortably above the line.
Ritch, I don't see the low freq problem you are
talking about.
Gourgen
The new channel appears to be inline with what we stated
- a tilt of the line from DC to about a 3dB drop at 5GHz. Why do you feel
the lower frequencies need to stay fixed?
Thanks, Joe
Joe Abler
abler@us.ibm.com
IBM
Systems & Technology Group
919-254-0573
High Speed Serial Link Solutions
919-254-9616 (fax)
3039 Cornwallis Road
Research
Triangle Park, NC 27709
|
| "Mellitz, Richard"
<richard.mellitz@INTEL.COM>
01/16/2006 10:41 AM
Please respond to "Mellitz, Richard"
|
To:
STDS-802-3-BLADE@listserv.ieee.org
cc:
Subject: Re: [BP] Interference tolerance
test channels
|
Hi Charles,
DC and low freq's went down way to
much! Can you create a model with the
same losses at say 1GHz or so and 2 dB
less at 5GHz? I thought that's
what we agreed.
...
Rich
-----Original Message-----
From: Charles Moore
[mailto:charles.moore@avagotech.com]
Sent: Friday, January 13, 2006 8:42
PM
To: STDS-802-3-BLADE@listserv.ieee.org
Subject: [BP] Interference
tolerance test channels
guys,
I propose that we use
the model ITTC_23.s4p for reduced attenuation
EIT modeling. If it
really will not work, ITTC_20.s4p is available as a
bail out channel.
If it looks too easy, let me know and i will step it
up just
a
tad.
The numbers refer to the fitted attenuation at
5.15...GHz.
charles
--
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|
Charles Moore
| Avago
Technologies
| Image Solutions Division
|
charles.moore@avagotech.com
| (970)
288-4561
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sdd21_plots.pdf