Re: DRM -Ain't- IBOC

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Article #496

#496

From: Frank Dresser
Date: Mon, 15 Oct 2007 16:32

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"SFTV_troy" <SFTV_troy@yahoo.com> wrote in message
news:1192458019.445135.155400@q3g2000prf.googlegroups.com...
>
> Don Pearce wrote:
> > On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
> > >"SFTV_troy"
> > >>
> > >>
> > >> I still don't see the difference.  Both standards are using
> > >> sidebands, adjacent to the analog AM signal.
> > >
> > >DRM is not using a sideband; to do analog and digital requires a
separate
> > >transmitter for each on a separate carrier frequency. HD is a combined
> > >analog and digital signal on the same carrier frequency. DRM is digital
> > >only... if you want analog, you have to have a separate channel, close
to or
> > >not to the DRM one.
> > >
> >
> > Exactly. DRM is a separate signal that can go wherever the operator
> > chooses. ..... It is not a sideband of the AM.
> > HD, on the other hand is an actual sideband of the AM carrier.
>
>
>
>
> I see your point, but that seems a trivial difference.  Especially
> since HD also uses a separate signal (exciter), separate from the
> analog signal.  "As with AM, FM stations may use separate exciters to
> modulate the very different signals." - wikipedia.
>
> Sounds like simulcast of two signals.
>
> Not just one.
>

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From: "Frank Dresser" <analogdial@worldnet.att.net>
Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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Subject: Re: DRM -Ain't- IBOC
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