Re: [10GBASE-CX4] Round trip delay (latest CX4 WP)
Hi Chuck,
This was an editorial "whoops" from our last meeting. We discussed this and
decided to spec it with 2m of cable, but
never made the change in the document.
Dan
>Hi, all,
>
>Here is an extract from an email of early January:
>
>---- begin included text ----
><CH>
>I was wondering about the delay constraints on CX4 (clauses
>44.3, 54.8) -- 512 BT round-trip.
>
>If the propagation velocity of the cable is between 0.6 and 0.8 c,
>then I compute the one-way delay for 15m as 625 to 834 Bit Times,
>round-trip is double that. Am I missing something?
></CH>
>
><HAB>
> The 512 BT came from the cut & paste of the similar section
>in Clause
>53. This number, at this time, is meant to solicit feedback for an
>actual measured delay. I haven't done this in our lab yet so thanks
>for
>this first cut correction.
></HAB>
>---- end included text ----
>
>Has anybody made a measurement, to update WP3p1 Table 44-2?
>
>Cheers,
> Chuck Harrison
> Far Field Associates, LLC
>