00READ_ME_GEN67YY.txt
	Notes for 802.3aq channel modeling ad hoc group.

------------------------------
John Abbott
Corning Incorporated SP-PR-1-3
Corning NY 14831
abbottjs@corning.com
January 10, 2005
------------------------------

The *.zip file tau_FDDI_NOV20_GEN67YY.zip has these files:

1. tau_FDDI_NOV20_Gen67YY.dat
	Monte Carlo data file with 1300nm mode delays for 5000 fibers
	corresponding to installed base FDDI fiber data.
	Information presented at 802.3aq San Antonio meeting
		Abbott_01_1104.pdf
2. OFLBW_Gen67YY.dat
	A table of 1300nm OFL BW's for the 5000 fibers.
	These are calculated using a theoretical weighting function
	which is linear in mode group numbers 1-18 and would ignore
	and mode groups above 18.
	The FDDI spec requires the measured OFL BW to be >500MHz.km, which can be
	approximated by using only fibers whos OFLBW_Gen67YY.dat entry is >500.
	Note the actual mode power distribution for an actual OFL BW measurement	
	would be slightly different.
		This file is included to facilitate the use of the Monte Carlo set.
3-4-5-6-7 PIEprint67_NOV20_5000x4_300m_24.dat  etc.
	These files have the calculated PIE-D metric for the 5000 fibers for
	some selected offsets.
	The 1st column is the fiber, the 4th column is PIE-D.
	PIEprint67_NOV20_5000x4_300m_24.dat corresponds to 23um,
	PIEprint67_NOV20_5000x4_300m_21.dat corresponds to 20um, etc.
		There are also columns for PIE-L and other channel metrics; these
		can be ignored.
8 -- Abbott_1_0106_Gen67_Gen54.pdf
	This *.pdf was shared with the 01/06/2005 Channel Modeling Ad Hoc Task 1 group
	and plots the 23um offset PIE-D metric distribution for the Gen67YY Monte Carlo
	set in this *.zip file and that of the Gen54 YY Monte Carlo set for comparison.
	(Gen54YY data set -- see 802.3aq Ottawa meeting abbott_1_0904.pdf)
9 -- 00READ_ME_Gen67YY.txt 
		This file.

Any Comments are appreciated.  Please let me know if you find general agreement
	or any significant discrepancy in the OFL BW or PIE-D values.