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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 From: owner-stds-802-3-maint@xxxxxxxx
[mailto:owner-stds-802-3-maint@xxxxxxxx] On Behalf Of Jonathan King 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 cube A262 |
Attachment:
Eye_mask.pdf
Description: Eye_mask.pdf