Re: [802.3_4PPOE] Fwd: Re: [802.3_4PPOE] IEEE802.3bt End to End Channel Pair to Pair Resistance Unbalance - Meeting material for Thursday May 8, 2014 meeting.

[Ken Bennett <ken_bennett@xxxxxxxxx>]

Hi Yair,

We can discuss the points of disagreement as you indicate.  One initial point I'd like to point out is the following:

(From the slide:)

PD PI Runbalance testing complexity:
      Has a time-varying load, so Sequential measurements won’t work universally unless special operating modes or internal probing is included

Yair:  (Disagree. When power on, look for DC behavior ,or specify DC behavior)   

Ken:  If the first step of an PD PI Runbalance test is to require a DC load behavior, you have already crossed a boundary forcing PD designers to implement a special operating mode that may not otherwise exist.  If testing worst case, then the DC mode has to be at full power, and full power without a varying load may not even be possible. 

Regards,
Ken

On 5/7/2014 3:45 PM, Darshan, Yair wrote:

Hi Ken,
Thanks. See my comments up to page 5 due to lake of time.
We can discuss more at the IEEE meeting.
Yair

-----Original Message-----
From: Ken Bennett [mailto:ken_bennett@xxxxxxxxx] 
Sent: Wednesday, May 07, 2014 8:42 PM
To: STDS-802-3-4PPOE@xxxxxxxxxxxxxxxxx
Subject: [802.3_4PPOE] Fwd: Re: [802.3_4PPOE] IEEE802.3bt End to End Channel Pair to Pair Resistance Unbalance - Meeting material for Thursday May 8, 2014 meeting.

Hi All,
I've attached some slides relating to the Runbalance PI Specification.
Comments are welcome.
Best Regards,
Ken