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Re: [BP] Wed August 4th Agenda: 802.3ap Channel Model Adhoc Confe rence Call



Hi John (and anyone else proposing coefficient changes),
 
As part of the ongoing discussion can you attach plots of the different curves?
 
Its hard to appreciate b1=..., b2=...    :-)
 
Thanks
Brian
 
 
-----Original Message-----
From: owner-stds-802-3-blade@listserv.ieee.org [mailto:owner-stds-802-3-blade@listserv.ieee.org]On Behalf Of DAmbrosia, John F
Sent: Monday, August 09, 2004 10:42 AM
To: STDS-802-3-BLADE@listserv.ieee.org
Subject: Re: [BP] Wed August 4th Agenda: 802.3ap Channel Model Adhoc Confe rence Call

Joel / Steve,

Based on the initial proposal and Steve's proposal, I came up with the following coefficients:

b1 = 1.8e-5

b2 = 1.3e-10

b3 = 3.98e-20

b4 = 1.4e-30

 

This takes advantage of Steve's proposed curve in the lower frequency range, and keeps the loss where Joel's initial proposal is.  I will spend some time looking at real channel data with these numbers, but this model addresses the general concerns that have been expressed.

 

John

 

 

-----Original Message-----
From: owner-stds-802-3-blade@listserv.ieee.org [mailto:owner-stds-802-3-blade@listserv.ieee.org] On Behalf Of Stephen D. Anderson
Sent: Thursday, August 05, 2004 11:23 AM
To: STDS-802-3-BLADE@listserv.ieee.org
Subject: Re: [BP] Wed August 4th Agenda: 802.3ap Channel Model Adhoc Conference Call

 

 

    Joel, all:

    Regarding changes to SDD21 magnitude curve:

3    I propose these coefficients:
    b1 = 2e-5
    b2 = 1e-10
    b3 = 3.2e-20
    b4 = 1.38e-30

    These allow skin effect to be modeled correctly and are a better lower limit to a lot of channels that have been presented.

    Regards,

    Steve A.
 

Joel Goergen wrote:

Wed August 4th Agenda:
- VNA averaging, with the higher resolution, do we really need to wait the 15minutes for 16averages?
- SMA De-Embedding for test cards
    **If you have an idea on this, please send it out to the group/refelctor today.  I'm open on this and would like some thoughts.
    **I plan to send the new run of test cards out right after we finalize the de-embedding.
- Changes to SDD21 from 50Mhz to 4.5Ghz.  I want to discuss this and plan to send out the equations tonight with a 4dB drop in this range.
- Group Delay Variation
    **I want to walk through the process for this.  Petre or Jeff ... if you have a slide you could put together to show how we create this, I would appreciate it.

Thurs August 12th Agenda:
- Changes to crosstalk mask

The remaining two meetings will be to discuss the final mask sets to present to the body for approval sept/oct.

Take care
-joel

Joel Goergen wrote:

802.3ap Channel Model Adhoc Conference Call times:
August 4, Wed, 10am PDT
August 12, Thurs, 10am PDT
August 19, Thurs, 10am PDT / we should consider moving this to Sept 20th
Sept 9, Thurs, 10am PDT

Hi Everyone,
Please set these times in your schedules.  Agenda will be sent out Monday

-joel
---------------------------------

Everyone that wants to is invited to participate.  Anything decided will not be decided, but 'recommended'.  Please keep that in mind.
 

Conference ID: 4379020

Dial-in number: 8773262337

International dial-in number: 303-928-3232
Take care
Joel Goergen