Hi Ragnar,
Thank you for sharing the results.
Just quick questions to make sure that we are on same page in terms understanding the number you have shown in the table because I hate guessing them ;-)
·
The AFE noise you considered for calculation is dBm/Hz or dB/Hz?
·
You mentioned ‘EC Connector Cancellation [%] = 100%’, is that corresponds to 5dB EC cancellation you assumed?
·
-40dB micro-reflection is after echo cancellation or before cancellation?
Kind regards,
Sujan
From: Ragnar Jonsson [mailto:rjonsson@xxxxxxxxxxx]
Sent: Wednesday, October 28, 2020 5:33 PM
To: STDS-802-3-B10GAUTO@xxxxxxxxxxxxxxxxx
Subject: [802.3_B10GAUTO] Question Follow-up - IL limit to achieve 25Gbps over 11m
All,
As a follow-up on today’s question about the limit line if we want to achieve 25Gbps over 11 meters, it would depend on the modulation (line code) used. I have enclosed an example for the PAM-4 modulation similar to 802.3ch. In this particular
example I chose to use about 3dB margin. With different modulation (line code) and different margin assumptions we will get slightly different insertion loss requirements. So what I have included in this email, should be considered an example. This is
NOT a formal proposal for what the IL target should be.
Ragnar
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