On Oct 4, 7:24 am, SFTV_troy wrote:
RHF wrote:
On Oct 2, 4:26 am, wrote:

Digital Radio Mondiale *is* IBOC. (Like HD Radio, it sits right
next to the AM signal, widening the channel by a few more kilohertz)

DOH ! - You had beeter go back and re-do your
DRM 101 and IBOC 101 Classes again. ~ RHF

Digital Radio Mondiale (DRM)
http://en.wikipedia.org/wiki/Digital_Radio_Mondiale
-
- You had "beeter" try reading the wikipedia article you site. Read
- it. Quote: "A full 10 kHz channel for AM, plus a 5 kHz half-
channel
- sideband for DRM."
-
- That's in-band on-channel mode.
-
- IBOC.
-
- duh

DOH ! - When you 'sight' a spelling mistake and choose
to 'cite' it; make sure you do not 'site' it instead. ~ RHF

SFTV -aka- "Hybrid Digital" Man,

If you continue to argue that DRM 'is' IBOC : Then clearly some
people on this Shortwave Radio Newsgroup are going to call to
question your educational claims and technical expertise as
an "EE".

One Again Please Read :

Note- The 'operative word here is 'may'.

DRM 'may' have the Analog "AM" Signal along-side
'Adjacent-To {as an Adjunct to} the Digital Signal.
{Two Unque and Separate Functions}
-NOTE- This uses up even more Bandwidth then DRM
alone and DRM alone uses up more Bandwidth then
Analog "AM" alone.
PLUS - The DRM Digital Signal Level Must be 'reduced'
so that it will not Interfere with the Simulcast of the
Analog "AM" Signal.
-IMHO- The better approach for DRM would be to
have the separate Digial and Analog "Simulcast"
Signals 'spaced' 50 kHz apart so that each of the
two independant Broadcast Signal would have no
chance of interferring with each other; and the DRM
Signal could be Transmitted at Full Power.
-Remember- DRM is a single Mode of Transmission.
-Also Note- DRM Radio/Receivers are Manual
Single Mode Operation and you would have to Tune to
each of the DRM or Analog "AM" Signals independly.

BY-DESIGN - IBOC has the Analog "AM" Signal
'nested' in-between the Two Outer Digital Side-Bands
and is Always 100% of the time Bi-Modal.
{Always Functions in Tandem : Analog and Digital}
-Remember- IBOC is a Dual Transmission Mode.
-Also Note- IBOC Radio/Receivers are Automatic
Dual Mode Operation; allowing you to Tune to a Single
Frequency and Receive either the Digital or Analog
when available. {True IBOC and not just a Simulcast}

Please refer to the DRM Manual -wrt- IBOC
www.drm.org/pdfs/Broadcast_Manual.pdf
Pages 19, 43 and 58 apply.

Wikipedia is 'Readers Digest' version of "What DRM Is"
http://en.wikipedia.org/wiki/Digital_Radio_Mondiale

IBOC is a Single Frequency Broadcasting "Technology"
http://en.wikipedia.org/wiki/IBOC
In-Band On-Channel (IBOC)

Simulcast is a Dual Frequency Broadcasting "Concept"
http://en.wikipedia.org/wiki/Simulcast

The Bottom Line : DRM -Ain't- IBOC