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LX1NW > SWL 15.06.03 10:20l 53 Lines 2259 Bytes #999 (0) @ WW
BID : F6DLX0PAC009
Read: DC3RJ GUEST DB0FHN DG1ASH DK5RAS F4VSJ
Subj: RTL DRM on 6095 kHz
Path: DB0FHN<DB0RGB<DB0FSG<DB0ZKA<DB0KFB<DB0CZ<DB0GE<LX0PAC
Sent: 030615/1158z @:LX0PAC.LUX.EU [Bourscheid JN39AV] bcm1.43l
From: LX1NW @ LX0PAC.LUX.EU (Michel)
To: SWL @ WW
Reply-To: LX1NW @ LX0PRG.LUX.EU
X-Info: No login password
Hi,
June 16th, 2003 will be the date of a new broadcast era on short-, medium-
and long-wave. June 16th, 2003 will be the starting date for "Digital Radio
Mondiale" (DRM), the new digital broadcast standard for frequencies below 30
MHz. DRM is a multicarrier COFDM modulation able to cope with severe
multipath propagation and offering FM-like audio quality while using the same
bandwidth as traditional AM transmissions. Explanations and sound examples
can be found at http://www.drm.org .
After successfull tests earlier this year, RTL Group
(http://www.rtlgroup.com) joins DRM's inaugural broadcasts on June 16th, 2003.
The special broadcasts will be transmitted from Junglinster on short wave,
6095 Khz, by RTL Group’s technical division BCE (Broadcasting Center Europe:
<http://www.bce.lu> ).
The program is a multilingual mix of music and announcements compiled by a
selection of RTL Group ( http://radio.rtlgroup.com/ ) radio stations.
Broadcasts will start at 6:00 UTC with a 5 minute AM announcement repeated
every hour.
Transmission start:
6:00 UTC (AM transmission)
6:05 UTC (DRM transmission)
Transmission end:
18:00 UTC or 20:00 UTC
(depending on propagation)
Transmitter power will be 35kW, antenna is non-directional.
You may post your reception reports here or send an email to "drm@rtl.com".
In order to receive DRM broadcasts, you need to feed a 12kHz IF signal from
your SW-receiver to the soundcard of your computer. This 12kHz IF signal can
be produced by mixing your normal IF (usually 455kHz) down with a simple
mixer (e.g. SA612A) (http://home.t-online.de/home/sat-service/sat/DRM/DRM.htm).
This 12kHz signal can than be decoded by a DRM software. There are two
softwares available. A professional product can be found at
http://www.drmrx.org for a fee of abt EUR 58.- This software offers
multimedia display and AAC+SBR audio. A freeware software is avaiable for
compilation at
http://www.tu-darmstadt.de/fb/et/uet/fguet/mitarbeiter/vf/DRM/DRM.html. It
has advanced analysis tools but does not offer SBR audio
(http://www.codingtechnologies.com/products/aacPlus.htm).
Have fun,
73 Michel
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