DRMradio

 

 

DRMradio.

DRM modes.

COFDM.

multiplex.

SFN.

FAC.

MSC.

SDC.

EPG.

AFS.

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