Digital Radio Sweden will evaluate different transmission test scenarios as follows:
1. Test A: DRM+, 96 kHz bandwidth, standard mode E, in VHF band II.
2. Test B: DRM+, 96 kHz bandwidth, standard mode E, in simulcast with FM, in VHF band II.
3. Test C: DRM30, 20 kHz bandwidth, in VHF band II.
4. Test C: DRM30, 20 kHz bandwidth, in VHF band II, in simulcast with FM (within the FM spectrum mask).
5. Test D: DRM+, 96 kHz bandwidth, standard mode E, in VHF band III.
Test A/D: Konventional broadcasts in mode-E
In conventional DRM+ (mode E) transmission in the VHF band II and band III, we vill test the two
modes indicated below. The first is mode E, 4-QAM, a robust mode for long range broadcasting that
offers a lower bitrate of 60 kb/s. This results in good, FM-like sound quality for normal progarmme
The other is mode E, 16-QAM, having a somewhat shorter range, but offer a higher bitrate of 120 kb/s
reflecting in high CD-like sound quality for normal programme material.
DRM (Digital Radio Mondiale)
DRM (Digital Radio Mondiale) is a universal and open standard for digital broadcasting and the only standard
covering all broadcast frequencies. This means a complete coverage from the lowest practical radio frequencies
to the high VHF band III. This includes long wave, medium wave, short wave VHF band I, VHF band II (FM
band) and VHF band III (DAB band). This makes DRM unique and future-proof.
DRM incorporates the latest start-of-the-art audio codecs for highest attainable sound quality and 5.1 Surround
Sound, Journaline text information, Video Slideshow, EPG-electronic program guide, various types of data
services and emergency warning / alert services.
DRM also incorporates the latest advances in radio modem technology, making DRM one of the most efficient
broadcasting systems in existence, thus preserving scarse RF spectrum for other use.