Re: [802.3_10SPE] Objective - BER

[Geoff Thompson <thompson@xxxxxxxx>]

George-

I don't know.  I see two interpretations.

#1

Maintain a bit error ratio (BER) at the MAC/PLS service interface of less than or equal to 10^-10 on link segments up to at least 15m.
Maintain a bit error ratio (BER) at the MAC/PLS service interface of less than or equal to 10^-9 on all link segments up to at least 1km.

(which to my eyes would imply but not require two PHYs)

#2

Maintain a bit error ratio (BER) at the MAC/PLS service interface of less than or equal to:
10^-10 on link segments up to at least 15m, and
10^-9 on all link segments greater than 15m up to at least 1km

(which to my eyes would imply a single PHY)

...but would be clearer wording.

 

Which is it?

Geoff

On Oct 28, 2016, at 11:46 AMPDT, George Zimmerman <george@xxxxxxxxxxxxxxxxxxxx> wrote:

We have had some round-abouts on how to write the BER objective.  Ludwig had proposed a nice split, where the short-reach/automotive PHYs had a 10^-10 BER objective and the longer reach ones had a 10^-9 BER objective.  With that in mind, I propose the following objective for discussion:

 

Maintain a bit error ratio (BER) at the MAC/PLS service interface of less than or equal to:

10^-10 on link segments up to at least 15m, and

10^-9 on all link segments up to at least 1km

 

 

Do we have consensus?

 

George Zimmerman, Ph.D.

President & Principal

CME Consulting, Inc.

Experts in Advanced PHYsical Communications

george@xxxxxxxxxxxxxxxxxxxx

310-920-3860