1. Teleconference notes, 11 August 2004 Jonathan King
IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise
Teleconference notes, 11 August 2004
Jonathan King
13 Aug 2004
IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise

2. Agenda
attendees
Presentations
Summary of AINSI document describing basic tests and measurements simulating field environment - John Dallesasse, Emcore
Measurement of time variance in MMF - Robert Coenen, Scintera
Summary of planned modeling of link and source temperature dependence - Petre Popescu, Quake
other business - discussion on connector loss vs offset methodology for standard link proposal
next meeting date/time
13 Aug 2004
IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise

3. 1) Attendees Jonathan King, Big Bear Networks Piers Dawe, Agilent
David Cunningham, Agilent
Petre Popescu, Quake
Petar Pepeljugoski, IBM
John Dallesasse, Emcore
Yu Sun, Optium
Joerg Kropp, Infineon
Jesper Hanberg, Intel
Andre Van Schyndel, Bookham
Lars Thon, Aeluros
Robert Coenen, Scintera
Tremant Maio, Analog
Paul Kolesar, Systimax
Gary Schaulov,
Al Brunsting, Panduit
Brent Lock
Derek Hoff
Nick Weiner, Phyworks
please let me know if you or your organisation have been missed
13 Aug 2004
IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise

4. 2) Presentations
a) Summary of existing standards simulating field environment - John Dallesasse (document name LRM080404)
GR-63-CORE summary; describes office environment vibration tests at 'constant acceleration' (0.1G & 1G) from Hz . Constant acceleration implies vibration amplitude ~ 1/f2 .
IEC summary: max frequency 55Hz
b) Measurement of time variance in MMF - Robert Coenen
Robert gave a verbal summary of the proposed measurement technique to determine relationship of perturbation spectrum to modal noise spectrum. A written summary is being finalized and will be shared in a few days.
c) Summary of planned modeling of link and source temperature dependence - Petre Popescu (document name 'channel_temperature')
Petre summarized the content of his planned modeling work. Fibre effects are expected to be small based on the temperature coefficient of silica; a summary of laser temperature effects for various types was posted to the reflector by Andre Van Schyndel.
13 Aug 2004
IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise

5. 3) Other business 4) Next meeting
Discussion on how to relate connector loss vs offset (for determining max connector loss for 'standard link')
David Cunningham had provided data on connector offset vs OFL loss for 62.5micron MMF. There was discussion on the practical methods used to measure connector loss. It was agreed that connector loss vs offset for an equilibrium mode distribution would be more representative, with a maximum of 0.5dB loss due to lateral offset representative of a worst case connector (this method used for 50micron MMF connectors). David offered to recalculate connector loss vs offset in this way.
It was pointed out that agreeing the standard link as soon as possible would be necessary to move forward modeling and experimental work of task 2
4) Next meeting
Wednesday 18th August 9am PCT, 5pm UK
13 Aug 2004
IEEE802.3aq Channel model ad hoc Task 2: Time-varying study & modal noise