Re: [10GBT] Transmit power levels
Sanjay,
Yes we are proposing 2Vpp launch voltage.
Joseph N. Babanezhad
Plato Labs.
----- Original Message -----
From: "Sanjay Kasturia" <SKasturia@TERANETICS.COM>
To: <STDS-802-3-10GBT@LISTSERV.IEEE.ORG>
Sent: Thursday, May 13, 2004 3:11 PM
Subject: [SPAM] Re: [10GBT] Transmit power levels
> Joseph,
>
> Are you still proposing 2v peak to peak?
>
> Thanks,
>
>
> Sanjay
>
> sanjay@teranetics.com
> cell (650) 704-7686
> office (408) 653-2235
>
> -----Original Message-----
> From: stds-802-3-10gbt@IEEE.ORG [mailto:stds-802-3-10gbt@IEEE.ORG] On
> Behalf Of Joseph Babanezhad
> Sent: Thursday, May 13, 2004 2:43 PM
> To: STDS-802-3-10GBT@LISTSERV.IEEE.ORG
> Subject: Re: [10GBT] Transmit power levels
>
> Sanjay,
>
> According to Solarflare's Nov. 2002 tutorial presentation (pg.17) their
> proposed launch power is 10-12dBm. During his Jan. 2003 presentation
>
> http://www.ieee802.org/3/10GBT/public/jan03/jones_1_0103.pdf
>
> Bill Jones mentions 9.5 dBm launch power (pg.5). After Jan. 2003 meeting
> Bill sent the following e-mail to the reflector and provided detailed
> analysis for coming up with their peak-to-peak launch voltage. That is
> where I got the 3.134Vpp launch voltage number for Solarflare.
>
> Joseph N. Babanezhad
> Plato Labs.
> ////////////////////////////////////////////////////////////////////////
> ////
> /////////////////////////////////////////////////////
> Date: Mon, 13 Jan 2003 14:13:18 -0800
> From: "William Jones" <wjones@solarflare.com>
> To: <stds-802-3-10gbt@ieee.org>
> Subject: [10GBASE-T] clarification on voltage level All headers
>
> In response to some questions at last weeks meeting (and to
> stimulate some reflector activity), I wanted to clarify the launch
> voltage level
>
> For 10 dBm, ideal PAM10 (random data and PSD ~sinc^2) and 100 ohm
> load
>
> Vrms = sqrt(P*R) = 1 V
>
> Vpeak = Vrms*sqrt(3*(M-1)/(M+1)) where M is the number of PAM
> levels
> = 1.57 V
>
> Vpp = 2*Vpeak = 3.13 V
>
> For 9.5 dBm
>
> Vrms = .944 V
>
> Vpeak = 1.48 V
>
> Vpp = 2.96 V
>
> Note: this is based on an ideal PAM signal, any filtering in the
> transmit path will change the PAR and peak voltages.
>
> regards
> Bill
>
> William W. Jones, Ph.D.
> Director of Systems Engineering
> SolarFlare Communications, Inc.
> 949-581-6830, ext. 2550
> mobile: 619-405-2445
> fax: 949-581-4695
> wjones@solarflare.com
>
>
> ////////////////////////////////////////////////////////////////////////
> ////
> /////////////////////////////////////////////////////////////////////
> ----- Original Message -----
> From: "Sanjay Kasturia" <SKasturia@TERANETICS.COM>
> To: <STDS-802-3-10GBT@listserv.ieee.org>
> Sent: Thursday, May 13, 2004 2:08 PM
> Subject: [SPAM] Re: [10GBT] Transmit power levels
>
>
> > George,
> >
> > Thanks.
> >
> > Sanjay
> >
> > sanjay@teranetics.com
> > cell (650) 704-7686
> > office (408) 653-2235
> >
> > -----Original Message-----
> > From: stds-802-3-10gbt@IEEE.ORG [mailto:stds-802-3-10gbt@IEEE.ORG] On
> > Behalf Of George A. Zimmerman
> > Sent: Thursday, May 13, 2004 2:07 PM
> > To: STDS-802-3-10GBT@LISTSERV.IEEE.ORG
> > Subject: Re: [10GBT] Transmit power levels
> >
> > No , at the time of Joseph's presentation we noted it was not
> correct.
> > I can't answer in detail now (I'm on my mobile ), but we will at the
>
> > meeting or before.
> >
> > George A. Zimmerman
> > cell: 310 920 3860
> > (sent from my mobile)
> >
> > -----Original Message-----
> > From: "Sanjay Kasturia"<SKasturia@TERANETICS.COM>
> > Sent: 5/13/04 1:46:33 PM
> > To:
> >
> "STDS-802-3-10GBT@LISTSERV.IEEE.ORG"<STDS-802-3-10GBT@LISTSERV.IEEE.ORG>
> > Subject: [10GBT] Transmit power levels
> > A quick scan through past presentations reveals a few different
> > proposals for transmit power levels.
> >
> > http://www.ieee802.org/3/10GBT/public/mar03/babanezhad_1_0303.pdf
> > , a
> > March 2003 presentation by Joseph Babanezhad of Plato Labs,
> > proposes 2v
> > peak to peak and also has a table on slide 16 that lists other
> prior
> > proposals: 2v peak to peak from a proposal from Cicada and 3.134v
> > peak
> > to peak for a proposal from Solarflare.
> >
> > A subsequent presentation from George Zimmerman of Solarflare,
> > gives a
> > range of TX power, > 6dBm to <10dBm though there is no mention of
> > actual peak to peak voltages. If I assume that the 3.134v peak to
> > peak
> > corresponds to 10dBm then the 6dBm number will be about 2v peak to
>
> > peak.
> >
> > Joseph, Vivek (Cicada) and George - is my interpretation of each
> > of your
> > proposals correct? Were there any other proposals on transmit
> power?
> >
> > Thanks,
> >
> >
> > Sanjay
> >
> > sanjay@teranetics.com
> > cell (650) 704-7686
> > office (408) 653-2235
> >
>