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