[802.3_100GEL] straw poll on backplane objective.
Thank you for the good discussion of the straw polls. Rather than focus on the numbers, it was my intent to focus on the form of the objective. Therefore, I will withdraw straw poll GZ0 (15" or 18" feasibility) at this time, and would like your feedback on understanding to focus on the main choice - what form the objective should take. Just as we are currently avoiding discussion of construction, and just as we want to avoid making decisions on PHY, packaging loss budget and other technical parts of the specification, it was my intent to stay clear of whether a backplane was printed circuit, cabled, hybrid, orthogonal, or other. Again, whatever sense you make of a backplane with economic feasibility and broad market potential and a certain dB loss, use that sense in evaluating what a 'backplane' is here - be equal in looking at the alternatives.
Consider poll GZ1, clarified to show that we would likely pick the length for the first form, just as we would pick the dB loss of the others:
* I prefer an objective of the form:
A: "Define a single-lane 100 Gb/s PHY for operation over electrical backplanes supporting up to at least TBD cm."
B: "Define a single-lane 100 Gb/s PHY for operation over electrical backplanes supporting connection from end to end of at least a 4RU rack-mounted chassis"
C: "Define a single-lane 100 Gb/s PHY for operation over electrical backplanes supporting an insertion loss ≤ TBD dB at 26.6 GHz."
D: "Define a single-lane 100 Gb/s PHY for operation over electrical backplanes consistent with an insertion loss ≤ TBD dB at 26.6 GHz." - with the understanding that this does not define the frequencies over which the channel is to be specified.
It was my intent that form C would be the same as what we considered in January other than the frequency - if there are any differences in form C (other than the frequency), they are by accident.
Please feel free to discuss and I'd be more than happy to get any feedback.
George A. Zimmerman, Ph.D.
President & Principal Consultant
CME Consulting, Inc.
Experts in PHYsical Layer Communications
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