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c) Radio Mode
Receiving concept RDS
The abbreviation RDS stands for Radio Data System, i.e. inaudible, additional information codes are trans-
mitted by the FM RDS station.
With the BT-RSD-1802K, you have a SD tuner that is able to evaluate these coded data that are transmitted
by most of the radio stations.
The following important data is transmitted:
- Program Identification (PI)
- Traffic Program (TP)
- Traffic Announcement (TA)
- Program Service (PS)
- Alternative Frequencies (AF)
- Program Type (PTY)
- EON Information (enhanced other networks)
- Clock time (CT)
Program Identification (PI)
This information helps the receiver to identify a station. It enables the radio to differentiate between areas
where the same programme is transmitted. The car radio only switches to a stronger station when the
reception grows weaker if the stronger station transmits the same programme identification.
Traffic Programme (TP)
This signal enables the receiver to detect that a station with a traffic programme is being received.
Traffic Announcement (TA)
With this signal the receiver can detect a traffic announcement and interrupt the current playback of a
different audio source.
Program Service (PS)
This information tells the receiver which station it is receiving. It is directly played back in the display of
the car radio, e.g. BAYERN 3.
Alternative Frequencies (AF)
A list of alternative frequencies that send the same programme is transmitted. If the transmitter station
currently received becomes too weak, the receiver detects from the AF signal on which frequencies it must
search for a better station.
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