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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
 
 
-----Original Message-----
From: Joe M Abler [mailto:abler@US.IBM.COM]
Sent: Monday, January 16, 2006 12:15 PM
To: STDS-802-3-BLADE@listserv.ieee.org
Subject: Re: [BP] Interference tolerance test channels


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
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"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
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sdd21_plots.pdf