Re: DRM -Ain't- IBOC

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Article #504

#504

From: dxAce
Date: Sat, 13 Oct 2007 18:14

48 lines
3450 bytes


David Eduardo wrote:

> "SFTV_troy" <SFTV_troy@yahoo.com> wrote in message
> news:1192292013.097961.57070@e9g2000prf.googlegroups.com...
> >
> > RHF wrote:
> >> On Oct 12, 8:52 am, SFTV_troy <SFTV_t...@yahoo.com> wrote:
> >> > RHF wrote:
> >> > > > On Oct 11, 5:48 am, SFTV_troy
> >> >
> >> > > > - There's no real difference between DRM's version
> >> > > > - (sitting next-to the AM signal) and HD's version
> >> > > > - (also sitting next-to the AM signal).
> >> >
> >> > > IBOC AM/MW "HD" Radio - Hybrid Mode
> >> > >http://www.dallas.net/~jvpoll/rfi/AM620_KMKI/AM_IBOC_Mask10.gif
> >> > > - Lower Digital Sidebands {Co-SideBand}
> >> > > * Analog Host Signal (Mono) {Nested}
> >> > > + Upper Digital Sidebands {Co-SideBand}
> >>
> >> - Thanks for proving my point.  HD sits *next to* the AM signal (+/-
> >>
> >> - 10 kHz).  Same as DRM sits *next to* the AM signal  (+/- 10 kHz).
> >>
> >>
> >>
> >> DRM = Simulcast without Specification {Sans-Mask}
> >> x x x Does Not Equal x x x
> >> IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands
> >
> >
> >
> > 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.

Both = QRM

dxAce
Michigan
USA

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From: dxAce <dxAce@milestones.com>
Newsgroups: rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
Subject: Re: DRM -Ain't- IBOC
Date: Sat, 13 Oct 2007 14:14:49 -0400
Organization: "The Listener at The Gates of Dawn"
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