22
RADIO NAVIGATION SYSTEM
AUDIO OPERATION
Radio operation with RDS
RDS (Radio Data System)
RDS (Radio Data System) is always active for
the radio navigation system.
In addition to their regular programming, an in-
creasing number of radio stations also transmits
RDS information that is picked up and evaluated
by the RDS receiver in coded form.
This information includes the radio station name
and the traffic information status for the radio
station selected.
Alternate frequency
The alternate frequency function ensures that the
system always tunes into the best frequency for
the currently selected radio station.
The radio may briefly switch to mute while sear-
ching for the frequency with the best reception.
If the system is unable to find an alternate fre-
quency for the station selected and it is no lon-
ger possible to pick up this station in satisfactory
quality, please select another station.
Radio operation
TMC (Traffic Message Channel)
In addition to their regular programming, a num-
ber of radio stations also transmits digital traffic
information on the Traffic Message Channel.
These messages are picked up by your naviga-
tion system and can be used for dynamic route
guidance (see
Selecting route options
, page 48
and
Activating the traffic congestion function
,
page 58). If a radio station provides TMC service,
TMC will appear in the status line of the display.
TMC stations can be stored in the TC1 and TC2
memory banks.
RDS Regional
Radio stations sometimes divide their pro-
gramming into regional programming at certain
times of the day.
At first, the system will tune into only those
alternative frequencies for the radio station
selected.
However, if the reception quality deteriorates to
the point that the radio might “lose” the station,
the system will also switch to frequencies used
by a "related" NDR 1 station. Because these
radio stations sometimes broadcast different
contents, this might mean that you will hear a
different programme.
Switching to regionally related stations
As a rule, the system will only switch to other
frequencies for the same station with the same
PI code. However, if the reception deteriorates
beyond a certain point, the system will also au-
tomatically switch to a regionally related broad-
casting network.
Summary of Contents for SatCompass
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Page 2: ...1 RADIO NAVIGATION SYSTEM EQUIPMENT ILLUSTRATION...
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