[SI-LIST] Re: PHY PCS
- From: "Kedar P Apte" <kedar.apte@xxxxxxxxx>
- To: <Ravindra.Johari@xxxxxxxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 2 Feb 2006 14:57:12 +0530
Hello Ravi,
it is related with dc balancing of the transmission medium.
in high speed serial transmission(mostly fiber channel) the dc residuals of
the transmission line becomes a problem for clock recovery and bit run
length also becomes a limiting factor to control that the 8b/10b encoding is
used.
I am not a guru some others Gurus may flash more light on this
Regards,
Kedar
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Ravindra Johari
Sent: Thursday, February 02, 2006 2:39 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] PHY PCS
Hi Gurus,
Have a very generic question about Physical Layer Device.
In the PCS i.e the Physical coding sublayer of the PHY Device why is the
8b/10b encoding/decoding required.
Why not the serial signals received by the MDI directly interfaced with the
MAC without encoding/decoding??
Apologies, if this is not related to Signal Integrity...
Thanks and Regards,
Ravi..
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