RE: [10GBASE-CX4] Re: Terminology
All,
I thought adjustments at the Rx end were referred to as "adaptive or active
equalization" and not pre/de-emphasis?
Regards,
Gary
-----Original Message-----
From: larry rennie [mailto:Larry.Rennie@nsc.com]
Sent: Wednesday, February 05, 2003 9:17 AM
To: Howard A. Baumer
Cc: Zev Roth; 10GBASE-CX4 (E-mail)
Subject: [10GBASE-CX4] Re: Terminology
Thanks for the reply Howard. I just wanted to make sure that in our
definition that neither term implied that it is a function of the TX or RX
exclusively, i.e., you can have pre-empahsis or de-emphasis at the TX or RX
end.
Regards,
Larry
"Howard A. Baumer" wrote:
> Larry,
> I thought at one point along the way we desided to call it
> de-emphasis. I know this hasn't caught on that well as even us here at
> Broadcom call it pre-emphasis at times. I don't think this nomenclature
> is that big of a deal. The more important definition is how the
> emphasis is computed and then communicated to the group. On this point
> the group desided to always speak in terms of (1-Vlow/Vhigh), where Vlow
> is the low value of the step response and Vhigh is the value of the
> peak.
>
> Howard
>
> larry rennie wrote:
>
> > Howard and Zev,
> >
> > In looking at some Dec 2002 presentations, I notice that the 2-tap
> > filter Broadcom calls a tx "de-emphasis" filter is called a tx
> > "pre-empahsis" filter by Mysticom (slide 5 of
> > MysticomCX4_Dec0602:6.pdf). What is the terminology we have decided
> > upon?
> >
> > Regards,
> >
> > Larry