From Radio World:










Proposed Alaska test of Digital Radio Mondiale on three shortwave
frequencies inFCC application from Digital Aurora Radio Technologies for
experimental authorization. The DoD-funded test would use Continental
transmitters designed for an Over-the-Horizon radar transmitting system and
a digital signal generator operating from the Delta Junction area.

“Compared to an ordinary analog shortwave signal, the DRM signal can
operate with the same coverage reliably … in a 10 kHz channel using a
transmitter power level approximately one-fifth of that needed for the
analog signal,” states Digital Aurora in the application, which remains
pending at the commission.

The company hopes to determine the “impact of high-latitude
ionospheric propagation in the shortwave bands on digital audio modulation
using the DRM system,” as well as determine what transmission power levels
will produce a reliable signal that can be received on DRM radios. Digital
Aurora also hopes to determine an antenna specification to deliver a signal
statewide.

Judging from the application, the two-year test proposal appears
notable because it would be the first time DRM has been tested in the U.S.
at such high latitudes, and because the company is proposing to broadcast
using digital shortwave technology to an entire state.

Digital Aurora believes it can contain most of the signal within
Alaska with little spillover into Canada. To avoid causing interference it
plans to stay at least two adjacent channels away from any channels used by
international broadcasters into western Canada.

David Eduardo wrote:

From Radio World:

Proposed Alaska test of Digital Radio Mondiale on three shortwave
frequencies inFCC application from Digital Aurora Radio Technologies for
experimental authorization. The DoD-funded test would use Continental
transmitters designed for an Over-the-Horizon radar transmitting system and
a digital signal generator operating from the Delta Junction area.

“Compared to an ordinary analog shortwave signal, the DRM signal can
operate with the same coverage reliably … in a 10 kHz channel using a
transmitter power level approximately one-fifth of that needed for the
analog signal,” states Digital Aurora in the application, which remains
pending at the commission.

The company hopes to determine the “impact of high-latitude
ionospheric propagation in the shortwave bands on digital audio modulation
using the DRM system,” as well as determine what transmission power levels
will produce a reliable signal that can be received on DRM radios. Digital
Aurora also hopes to determine an antenna specification to deliver a signal
statewide.

Judging from the application, the two-year test proposal appears
notable because it would be the first time DRM has been tested in the U.S.
at such high latitudes, and because the company is proposing to broadcast
using digital shortwave technology to an entire state.

Digital Aurora believes it can contain most of the signal within
Alaska with little spillover into Canada. To avoid causing interference it
plans to stay at least two adjacent channels away from any channels used by
international broadcasters into western Canada.

More QRM.

"dxAce" wrote in message
...



More QRM.



On the other hand, if this works, it could become a revitalizing force for
SW to cover sparsely populated and remote areas of the world and even
reverse the decline in SW station numbers.

David Eduardo wrote:

"dxAce" wrote in message
...



More QRM.



On the other hand, if this works, it could become a revitalizing force for
SW to cover sparsely populated and remote areas of the world and even
reverse the decline in SW station numbers.

Like your stupid IBOC works?

Pay attention, 'Eduardo', it will only mean more QRM.

dxAce wrote:


David Eduardo wrote:


"dxAce" wrote in message
...



More QRM.



On the other hand, if this works, it could become a revitalizing force for
SW to cover sparsely populated and remote areas of the world and even
reverse the decline in SW station numbers.


Like your stupid IBOC works?

Pay attention, 'Eduardo', it will only mean more QRM.



I do not have the luxury of living in a radio quiet area; I battle
monumental QRN and RFI from hosts of consumer and industrial devices.
I for one, would welcome a reliable modulation method that punches
through that mess, and if a digital scheme on SW that respects
known adjacent channels will do this, I am interested.

Michael

msg wrote:

dxAce wrote:


David Eduardo wrote:


"dxAce" wrote in message
...



More QRM.



On the other hand, if this works, it could become a revitalizing force for
SW to cover sparsely populated and remote areas of the world and even
reverse the decline in SW station numbers.


Like your stupid IBOC works?

Pay attention, 'Eduardo', it will only mean more QRM.



I do not have the luxury of living in a radio quiet area; I battle
monumental QRN and RFI from hosts of consumer and industrial devices.
I for one, would welcome a reliable modulation method that punches
through that mess, and if a digital scheme on SW that respects
known adjacent channels will do this, I am interested.

Forget it. DRM = QRM.

"dxAce" wrote in message
...


David Eduardo wrote:

"dxAce" wrote in message
...



More QRM.



On the other hand, if this works, it could become a revitalizing force
for
SW to cover sparsely populated and remote areas of the world and even
reverse the decline in SW station numbers.

Like your stupid IBOC works?

Pay attention, 'Eduardo', it will only mean more QRM.

.... on an otherwise empty band if trends continue as they have been.

On May 8, 11:25*am, "David Eduardo" wrote:
"dxAce" wrote in message

...


- - More QRM.

- On the other hand, if this works, it could become a
- revitalizing force for SW to cover sparsely populated
- and remote areas of the world and even reverse the
- decline in SW station numbers.

d'Eduardo,

So they would be using the Digital Radio Mondiale (DRM)
Signal as a intra-continental Domestic Broadcast System
with a Range out to 900~1200 Miles.

Much like the Tropical Bands {5 MHz and below} are used
for Domestic Shortwave Radio Broadcasting to serve Nations
like : Russia, China, Brazil, Australia, Indonesia, India, etc.

Digital Radio Mondiale (DRM) can work within {intra} Europe,
Russia, China, India, Brazil, Australia, Indonesia, Alaska,
Canada, Large Nations requiring a Nation-Wide Domestic
Broadcast System covering the Rual and Remote Areas;
where the Local AM and FM Radio Stations can not get.
http://groups.google.com/group/rec.r...ed7bc429af3132
Question - Is there a Place for Digital Radio Mondiale (DRM)
in the Scheme-of-Things for the USA . . . only time will tell.

Digital Radio Mondiale (DRM) Welcomes Go-Ahead for
“Tropical Band” DRM Broadcasts
http://blogs.rnw.nl/medianetwork/drm...and-broadcasts

Again for Digital Radio Mondiale (DRM) to be 'effective' the
Band Plan for any and all Tropical {Domestic} and Shortwave
{International} has to be Redefined from 5~10kHz Channel
Spacing to 20~25 kHz to Reduce the Potential for Adjacent
Channel Interference.

Since these would be 'fixed' {un-changing} Domestic Broadcast
Frequencies that should in the long term not represent a
problem for the In-Country National Broadcasters; provided
that approprite Digital Radio Mondiale (DRM) Power Levels
are used along with the properly 'configured' Antenna System
to cover their Nation within it's Borders.

The Tropical Bands and National {Domestic} Broadcastion
is about servive the Needs of the Radio Listeners within a
Country consistant with their National need for the Distribution
of Information -translation- DXer's Be Damned.

On-the-Plus-Side - The State of Alaska has enough Money
from Oil Revenues to Buy Every Citizen and Household a
new All Alaska AM/FM/DRM Radio to "Make-the-System"
HAPPEN !