[opendtv] Re: 20060912 Twang's Tuesday Tribune (Mark's Monday Memo)
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 15 Sep 2006 17:47:01 -0400
> The Gemini chip, with a lagging echo tolerance of 60 usec, is a
> lot better than 8K COFDM at 1/16 GI. I was comparing it to the
> 8K at 1/16 GI.
Obviously, I meant a lot better than *2K* COFDM.
By the way, 1st and 2nd generation COFDM receivers, according to the
French TNT report,
http://www.csa.fr/pdf/Rapport-GT2-Aspects_Radiofrequence_de_la_TNT.pdf
p. 23, were not that great at pre-echo either. So perhaps what echo
there was in those London flats was close-in and mostly lagging. If
that's true, that also suggests that a modern 8-VSB receiver would work
well by comparison.
Bert
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