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Re: [802.3_SPEP2P] Your question about 8B6T+PR and minimum distance

Thank you, Brian. We will retry and get back to you later.

 

Thanks for the reponse.

 

Best Regards,

 

Yan

 

From: Murray, Brian <Brian.Murray@xxxxxxxxxx>
Sent: Thursday, May 23, 2024 10:15 PM
To: STDS-802-3-SPEP2P@xxxxxxxxxxxxxxxxx
Subject: [802.3_SPEP2P] Your question about 8B6T+PR and minimum distance

 

Yan

 

With regard to your question on the 8B6T+PR and minimum distance and the quick simulation you did.

 

In your example in Excel you have a problem with the initial conditions. Your first transmit ternary 6T symbol is as follows:

 

TX 6T sequence with disparity                         

An    Bn    Cn    Dn    En    Fn

-1    0     0     1     -1    1

 

And your first Rx Quinary 6T symbol is as follows:

 

RX Quinary sequence with 1+D channel                              

An    Bn    Cn    Dn    En    Fn

-1    -1    0     1     0     0

 

So you have assumed that the value of the TX 6T Fn at time before 0, e.g. (time -1) is 0. However, the previous symbol cannot end in zero. So the value of An for your first Rx Quinary 6T symbol must be 0 or -2. Not -1.

 

Brian

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