15
Audio mode
Digital radio mode* (DAB, DAB+ and DMB-
Audio) Operation
Fig. 12 DAB radio
mode
Some units are equipped with an additional DAB radio receiver. DAB is a
digital broadcasting standard for the terrestrial reception of radio programs.
The DAB radio receiver supports the DAB, DAB+ and DMB-Audio broadcast-
ing standards.
In Europe, digital radio is transmitted via Band III (174 MHz to 240 MHz)
and the L Band (1452 MHz to 1492 MHz) frequencies.
The frequencies of the two bands are referred to as “channels” and one
each has a suitable channel name (e.g. 8A).
Several DAB stations are combined in a channel with the additional services
available in a station “ensemble”.
The main view of DAB radio mode shows the name of the channel and the
channel's international ID, which appears above the station name in the
centre of the display.
DAB is currently not available in all areas . When in DAB radio mode in areas
with no DAB reception, it displays: . DAB announcements
DAB announcements are additional DAB services that are also broadcast on
the radio (e.g. News, sports news, weather, warnings, etc.).
Note
The channel name, an indication that appears above the station's name,
varies depending on the country, for example “FU-E”, but not the channel's
international ID, for example “11B” ⇒ Fig. 12.
Automatic station tracking
DAB programme tracking
Some DAB stations are broadcast in different regional ensembles.
If the current station is no longer available in your location, the unit may al-
so switch to a corresponding partner station.
DAB programme tracking can be switched off in DAB settings ⇒ table on
page 30, SFO
since it is not always required; i.e. when the vehicle is pass-
ing through a tunnel, the loss of reception is only momentary and in these
cases the automatic station switching is not required. The radio will be mut-
ed if reception is too weak.
Change from DAB to FM
Under DAB setup, the unit can be configured to switch to the FM ⇒ table on
page 30, FML
frequency band when required for automatic station track-
ing.
If reception of the currently selected DAB station is lost (e.g. no DAB availa-
ble), the unit attempts to find the station on the FM frequency band and
tune to it. Automatic station tracking between frequency bands only works if
the DAB station and the FM station transmit the same station identifier or
the DAB signal indicates a corresponding station on the FM frequency band.
