On Oct 4, 7:31 am, wrote:
Hein ten Horn wrote:
wrote

DRM has a hybrid digital/analog mode. See this manual,
page 20. Notice how the DRM sits "in-band on-channel"
same as the HD Radio works.
www.drm.org/pdfs/Broadcast_Manual.pdf

No, the manual does not state
"DRM has a hybrid digital/analog mode".
A simulcast is not necessarily hybrid.


- By that reasoning, HD Radio is not a hybrid format, because
- the digital information sits *next to* the AM signal.

SFTV -aka- "Hybrid Digital" Man,

As and "EE", your above Statement is NOT Correct nor Clear
and it does not represent the Technical Specification {Facts}
of both iBiquity's IBOC and DRM. Please endeavor to be more
Factual and Accurate in your future representaions here.

Now For The Third Time :

iBiquity's IBOC Broadcast System is a Dual Mode Broadcasting
Scheme; with both the Analog AM and Digital Signals 'being'
"Intrinsic" to the Radio Transmission Process.

The Key Word Being : "Intrinsic"
http://www.answers.com/intrinsic&r=67

The DRM Broadcast System was initally designed and implemented
as a Single (1) Mode All Digital Broadcasting Scheme.

Note - Simulcasting and Analog AM Signal along with the Digital is
a 'possibility' but is NOT currently done on the Shortwave Radio
Band.

FWIW - The DRM Digital Signal 'may' be Broadcast along side
of an Analog AM Signal {Co-Channeled} -but- Both Signals are
Broadcast Separately and are 'independent' of each other; they
are NOT "Intrinsic" to each other as part of a Unified Radio
Broadcast System.

Caution - That the DRM Digital Signal has to be 'reduced' when
it is Broadcast along side an Analog AM Signal to prevent any
Interference to the Analog AM Signal.

The-Bottom-Line : Presently in the Shortwave Bands DRM
is Broadcast 'solely' in the 100% Digital Mode; as it was
designed to do.

for the third time or more - keeping it simple and practical ~ RHF