DRMradio

 

 

DRMradio.
DRM modes.
COFDM.
multiplex.
audio.
Journaline.
multimedia.
bandplan.
QSL 1.
QSL 2.
DRM UK.
Beidweiler.
Crystal Palace.
Orfordness.
Ismaning.
Junglinster.
Marnach.
Moosbrunn 1.
Moosbrunn 2.
Rampisham.
S Maria di Galeria.
Taldom.
Sines.
Woofferton.
bit Express.
BR-B5akt.
RTL Radio.
Vatican Radio.
WDR 2 Klassik.
DRMscan 1.
DRMscan 2.
DRM receivers.
DRM Poll.
Links.

RTL  broadcasting DRM on 1440 kHz (208 metres) medium wave with ‘RTL Radio - Die besten Hits mit Gefühl’ from the Marnach transmitter site.

 

RTL reception is shown below, for January the 1st and 2nd 2005. Mode B was used starting at a bitrate of 18.4 kbps (protection level 1).  During the broadcast the protection mode was switched to level 0 (more robust) which improved the reception but reduced the audio quality.

 

RTL switched back to AM at 17:00.

 

 

 

Mode A RTL broadcast for the 3rd January.

 

Mode B RTL broadcast for the 4th January, perfect reception.

 

Mode A RTL reception during the day (240 kW).

 

During the day Mode A is preferred but at night the sky wave signal can be received were the channel’s Impulse Response exceeds Mode A’s guard interval (2.6 mSec) so Mode B is used.

 

[Screen shots using DRMcalc analysis software written by Carsten Knutter, blue graph is audio frames decoded and the red line is signal strength expressed as a SNR]

 

 

 

RTL radio