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Your points about and why everyone believe LRM modules require DDJ compliance but somehow limiting link
don't care puzzles me too! Attach 802.3ae and 802.3aq link simulation shows both DDJ and DDPWS impact the
TDP/TWDP, my observation are DDPWS has more linear relationship to the penalty but in the case of TDP
it is pretty resilient to DDJ to some point then you start seeing hockey stick penalty. May the reason DDJ is
discarded for limiting link is it's insensitivity at low DDJ values?
If the output eye has significant closure and jitter it will impact both DDJ and TWDP. I have also added Norm
as he was involved heavily with LRM and might be able to shed some more light on this subject.
(Just remember TDP results are based on 300 m per definition of 802.3ae with 55 ps FIR filter).
Brian Misek wrote:
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