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Re: [10GBT] Digital Transmit Filter for the PAM-8 Proposal


The transmit filter for emissions control can be implemented either in
digital or in analog.

We've studied the transmit filtering scheme proposed in powell_1_0704.pdf as
a potential candidate for the PAM8 system. I'll discuss the tradeoffs of the
transmit filter parameters vs. SNR margin vs. EMI PSD during our interim

Sailesh Rao.

>From: Frank McCarthy <fmccarthy@TERANETICS.COM>
>Reply-To: "IEEE P802.3an" <>
>Subject: [10GBT] Digital Transmit Filter for the PAM-8 Proposal
>Date: Wed, 18 Aug 2004 14:22:52 -0700
>Hi Sailesh,
>     After reviewing Sanjay's latest proposal-details spreadsheet, I
>noticed the PAM-8 proposal still includes a digital transmit filter. The
>symbol rate has been updated to 952.381 MHz. Last month, you indicated
>on the reflector that you were considering "co-opting the fine transmit
>filtering method proposed in powell_1_0704.pdf to use in a PAM8 system -
>I think it's about time I take something from Scott, for a change :-)."
>The PAM-10 proposals have left the digital transmit filter as TBD
>pending more EMI data.
>     Have you made a decision concerning the digital transmit filter for
>your PAM-8 proposal?
>             Regards,
>             Frank McCarthy
>             Principal Engineer
>             Teranetics, Inc

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