[802.3_RTPGE] Channel model inputs for PHY designers

[George Zimmerman <gzimmerman11@xxxxxxx>]

To help Chris write his letter, I thought I’d get some parameters onto the reflector and others can add things they think we need to know from a PHY perspective.

Please reply and add as needed

-george

George Zimmerman

CME Consulting

 

Some parameters needed for PHY –

 

For known, economically feasible cabling:

 

Insertion loss over as much frequency as possible of a single pair

-          New (what a lab demo might show)

-          Aged, under temperature extreme

Return loss over same

Pair-to-Pair power-sum crosstalk transfer functions over same & common installation practices

near-end crosstalk for multi-pair cables

far-end crosstalk for multi-pair cables

Power sum Alien crosstalk (6-around-1 pair-to-pair for single-pair cables) as above

                Near end

                Far end

External noise sources typical

                Stationary (including frequency content)

                Time variable (things that come and go)

                Impulse noise – pulse width distribution, pulse count, and any frequency data

                RF ingress – tones? Modulated signals (e.g., cell phones)?