Re: DRM -Ain't- IBOC

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Article #502

#502

From: David Eduardo
Date: Sat, 13 Oct 2007 17:05

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"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.

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From: "David Eduardo" <david@davideduardo.com>
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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