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Re: [10GBT] Transmit power levels

Hi Sanjay,
 
I assumed 2Vpp signaling using 10-PAM and a "1000BASET-like" pulse-shape and a second-order 400MHz roll-off in the DAC/LineDriver. This results in a transmit signal power of 3.5dBm.
 
Vivek

Vivek Telang
Vitesse Semiconductor
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email: vivek@vitesse.com
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-----Original Message-----
From: Sanjay Kasturia [mailto:SKasturia@TERANETICS.COM]
Sent: Thursday, May 13, 2004 3:47 PM
To: 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
 
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