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About DAB
With this unit you can receive and listen to Digital
Audio Broadcast (DAB) programmes. DAB uses digital,
not analogue signals, resulting in near CD-quality
audio with virtually interference-free reception. Along
with superior quality audio, DAB can also deliver
additional audio channels and text. In the future,
computer data and images are also possible.
Digital radio is broadcast as groups of data called
Ensembles or Multiplexes. Each Ensemble can contain
a number of stations (services) and each station
contains a primary service and can contain secondary
services as illustrated in the following diagram.
Each Ensemble is transmitted in a set frequency range
and received by this unit for decoding. You can receive
Ensembles broadcast in the 174-240 MHz (Band III) or
1453-1490 MHz (L-band) frequency band and store
the services in each Ensemble for you to access. The
number of Ensembles you receive depend on your
location. Channels used in the UK are in the range
10A to 12D, and for international 5A to 13F. For L-
band the channels of LA to LW are available.
Ensembles and stations have labels (names) that are
used to identify them. Instead of needing to know the
particular frequency of your favourite broadcast, you
can simply select the station name. Secondary services
and additional data such as text or Ensemble
information are also available.
DAB SIGNAL
BBC
National
1
1
2
3+
1
2
3
4+
ENSEMBLE
DAB
STATIONS
BBC Radio 4
(PRIMARY
SERVICES)
SECONDARY
Parliament
SERVICES
50