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Beschikbare talen
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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 transmitter.
Program Type (PTY)
This code gives the receiver information about the type of the transmitted programme (e.g. sports, classic,
news etc.). The listener can select his favourite programme purposefully.
A national disaster alarm can also be prepared this way. However, not all the radio stations offer the
PTY service.
Clock time (CT)
Many stations transmit the current time in the RDS data. If a radio receives this signal, it sets the in-built
clock automatically.
Therefore, when you leave the transmission area, the RDS system has the advantage that it switches to
a similar transmitter station that can be better received. However, it only changes when it finds a better
transmitter station with the same programme.
Short signal attenuations due to the reception cannot be eliminated by the RDS system either, since this
would mean that the car radios permanently switches back and forth. The listener would feel much more
disturbed by this than by short-term reception problems.
Another advantage of the RDS system is that the station name is displayed. The station name of an RDS
station is displayed in the car radio.
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