Jonathan,
in the last line of your minutes you
state that no suggestions were made regarding an alternative to the EF
launch metric. On the contrary I did make a suggestion to use Mode
Power Distribution or Mode Transfer Function. MPD is the normalized
mode group power as a function of normalized mode group number.
MTF is the normalized mode power as a funtion of normalized mode number.
Using either of these, it is possible to define a mask, similar
to a waveform mask, that defines the bondary between acceptable and unacceptable
power distributions. Instruments are available from multiple suppliers
that measure EF, MPD, MTF. I took an action item to provide references
to Lew and Jim for these, which I have done. Please reflect this
in the minutes.
Because the MPD and MTF measurements
provide power distribution as a function of modes, it can be much more
precise compared to EF which defines power as a function of space. The
present EF specifications can be converted to MPD or MTF masks, but the
boundaries would be very liberal. If one wished to hone-in on, for
example, a particular vortex launch, a portion of this passing EF space
would be selected that more precisely defined the vortex.
Paul Kolesar
Jonathan King <jking@BIGBEARNETWORKS.COM> Sent by: owner-stds-802-3-10gmmf@IEEE.ORG
01/17/2005 07:58 PM
Please respond to
"IEEE P802.3aq 10GBASE-LRM" <stds-802-3-10gmmf@IEEE.ORG>
To
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Subject
Re: [10GMMF] Task 2 and 4 Launch study
group -minutes of Jan 12th meeting
Jan 12th meeting minutes attached
please let me know of any comments as soon as you can
Also, if you wish to, please comment on the draft launch
recommendations table rev0.2 sent out last week !
Next meeting is on 19th Jan 9.30am PCT, same call details as usual (I'll
send a reminder tomorrow).
best wishes