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7 7 7 7 7 DAB and RDS
What is DAB?
DAB stands for digital audio broadcasting. It is a new form of radio
that is broadcast digitally. Unlike regular analog broadcasting, digital
radio deteriorates less, and is thus able to provide quality sound
close to that of a CD.
DAB structure
Tuning for DAB differs from the method used for analog radio.
Analog stations all broadcast on different frequencies, even if it is
the same company doing the broadcasting. With DAB however, it is
possible to broadcast a number of services on the same frequency.
So once you have tuned to a station, you can easily switch between
the different services that station offers.
In DAB terminology, this station is called an "ensemble," and the
services provided by it are called, simply, "services."
An example of DAB structure
ENSEMBLE
SERVICE 1
SERVICE 2
Primary service
Secondary service
SUB 1
The broadcaster will have its own names for "ensemble" and "service."
As shown in the chart, a single primary service can contain multiple
secondary services. This means, for example, that commentary on
sports events from different areas can all be broadcast at once.
There are also services that offer data, graphics that can be
processed by computer for example, that you can download and
view. In the example above, you can make use of DATA 1 while
you are listening to SERVICE 4+ (a).
What is RDS?
RDS stands for radio data system. It is extra information that is
attached to an FM broadcast by the broadcaster. This unit can
make use of text and PTY data if provided.
a
SERVICE 4 +
SERVICE 3
SUB 2
DATA 1
Other features and DAB functions available with this unit
DAB use digital broadcasting to provide other useful features. This
unit uses the following functions to make use of them.
Announcement
Periodic broadcast services, for example news and traffic reports.
The announcement function on this unit allows you to program the
unit to switch automatically to these announcements when they
start. You are able to choose the variety and language of the
announcements.
Text display
This unit is can display these types of text:
Ensemble label: the name of the ensemble
Service label: the name of the service
Dynamic label: information about the broadcast
PTY: program type
This text can only be displayed if the broadcaster is providing it.
PTY search
You are able to make a search for a particular type of program if the
broadcaster is providing the signal.
Note
Some characters received as DAB/RDS text can not be dis-
played correctly on this unit.
This unit's RDS functions
Text display
This unit is can display these types of RDS text:
PS: the name of the station
PTY: program type
RT: information about the broadcast (the name of the song, artist,
etc.)
This text can only be displayed if the broadcaster is providing it.
PTY search
This functions the same as the DAB PTY search function.
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