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 also transmitted by radio
(e.g. News, sports information, 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
⇒
page 30 if
you do not want automatic station switching because only brief reception
losses are occurring due to the vehicle passing through tunnels, for exam-
ple. The radio will be muted if reception is too weak.
Change from DAB to FM
Under DAB setup
, the unit can be configured to switch to the FM frequency
band when required for automatic station tracking
⇒
page 30.
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.
If the reception of the selected DAB station is lost and the station cannot be
found on the FM frequency band, the radio will be muted.
