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Re: [802.3_MAINT] 802.3 revision: intention to comment on Clause 52



Title: 802.3 revision: intention to comment on Clause 52

Hi Pete,

 

This is good stuff. I have a question though. It seems like some experimental/empirical measurement data could be included to bolster the theoretical arguments. I would think they are relatively easy to capture by finding a set of transmitters that marginally meet the existing limit, and then comparing the results against the new limit. These transmitters should be captured from a range of devices to provide some distribution in properties.


Do you agree?


Dan

 

From: owner-stds-802-3-maint@xxxxxxxx [mailto:owner-stds-802-3-maint@xxxxxxxx] On Behalf Of Anslow, Peter
Sent: Friday, February 04, 2011 3:56 AM
To: STDS-802-3-MAINT@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_MAINT] 802.3 revision: intention to comment on Clause 52

 

Jonathan,

 

Since the eye mask test used in Clause 68 and 802.3ba allows some of the samples to be within the mask, an alternative statistical transmitter eye mask test for Clause 52 will need to use a larger mask than the current test so that it doesn’t allow a worse transmitter to pass that the current test does.

 

I have attached a presentation on the results of some simulations aimed at investigating how much larger the mask should be.

 

Regards,

Pete Anslow | Senior Standards Advisor
43-51 Worship Street | London, EC2A 2DX, UK
Direct +44 2070 125535
|

 

From: owner-stds-802-3-maint@xxxxxxxx [mailto:owner-stds-802-3-maint@xxxxxxxx] On Behalf Of Jonathan King
Sent: 28 January 2011 01:05
To: STDS-802-3-MAINT@xxxxxxxxxxxxxxxxx
Subject: [802.3_MAINT] 802.3 revision: intention to comment on Clause 52

 

Dear all

In advance of the 802.3 revision document planned for release for comment in March, I’d like to let you know that I plan to comment on it, with a proposal to add to Clause 52 an alternative optical transmitter eye-mask test, which leverages the statistical eye mask measurement techniques developed for 802.3aq and 802.3ba.

The proposal will be in the form of an annex associated with Clause 52 (assuming this is OK with the editors) since this seems to be the easiest way to add an alternative test with minimal changes to the original document.

The motivation is to offer a more accurate and repeatable optical transmitter eye-mask test which can be a replacement for the 0-hit eye mask test used on legacy 10GBASE-R, which provides the same, or higher, level of confidence of test results, and which will potentially lower test time and test cost.  10G products continue to ramp up in volume, and test time is a significant bottleneck for low cost, high volume production.

If you wish to be involved in early drafting of the comment and more importantly drafting the text of the alternative eye-mask test, please contact me by e-mail.

best wishes

jonathan

Jonathan King

Finisar Corp

1389 Moffet Park Drive

Sunnyvale, CA 94089

 

ph: 1 408 400 1057

cell: 1 408 368 3071

e-mail: jonathan.king@xxxxxxxxxxx

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