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Re: [802.3_100GCU] [Fwd: Recommended channels to use]

mike,
All of the PAM4 channels assume FEC. That is the ones i say are definitely bad are definitely bad with FEC, all the ones i say are near the limit are only near the limit with FEC, of the 2 quaoted as good, one is good only with FEC the other is good even without FEC. 

I could find no channels which looked near the limit for NRZ with FEC.
Maybe i could generate one or two.

charles

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| Charles Moore | Avago Technologies 
|       APD
|       charles.moore@xxxxxxxxxxxxx
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Mike Dudek wrote:

You don't mention any channels that are near the limit with FEC.  As PAM4 is expected to have FEC all the time I'd have thought we'd need channels above and below the limit with FEC.

Looking at what you say about the channels for PAM-2 I see that we potentially have the same issue for those channels as well for use with FEC.
Mike Dudek QLogic Corporation 
Senior Manager Signal Integrity
26650 Aliso Viejo Parkway
Aliso Viejo  CA 92656
949 389 6269 - office.
Mike.Dudek@xxxxxxxxxx


-----Original Message-----
From: Charles Moore [mailto:charles.moore@xxxxxxxxxxxxx] Sent: Thursday, June 14, 2012 3:44 PM 
To: STDS-802-3-100GCU@xxxxxxxxxxxxxxxxx
Subject: [802.3_100GCU] [Fwd: Recommended channels to use]

folks,

    At the June 7 channel model consensus group discussion i agreed to provide recommended channels to use for testing potential channel evaluation methods.  Enclosed is a csv file with my recommendations for
PAM4 channels intended to work with FEC. 
   In the file i list 10 channels,

   2 which qikSN says are definitely bad.  Both are moderately short.

   6 which qikSN says are near the limit without FEC, some
     slightly above the limit, some slightly below.

   2 which qikSN say are definitely good one short one moderately short.

I also include an updated list of NRZ channels as there were a few errors in the last set
                       charles