Re: [BP] channel loss difference
Charles,
Is that number SE or differential?
John
-----Original Message-----
From: Charles Moore [mailto:charles.moore@AVAGOTECH.COM]
Sent: Thursday, January 26, 2006 3:26 PM
To: STDS-802-3-BLADE@listserv.ieee.org
Subject: Re: [BP] channel loss difference
shannon,
Yes you are right. I forgot that we are including the Rx board in
"withCoupler"
channel and s23 and s41 start to make a difference. Here is yet another
channel,
this one really has sdd21=23.1dB at Nyquist.
charles
Sawyer, Shannon wrote:
> Charles,
>
> The difference (no pun intended) shows up in the differential vs
> single ended S-Parameters. I plotted SDD21 and S21 for
> modITTC23withCoupler.s4p, and there is 1.428dB difference at 5.160GHz.
> See attached.
>
> Sorry I had to be at another meeting at noon, but I like the idea of
> going to a 20dB channel. In my opinion that's the lever big enough to
> get a real system working. Unfortunately several (8 Molex, 4 Tyco, 3
> Intel) channels violate that SDD21 up to 5GHz. See attached.
>
> -Shannon
>
--
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