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4.3.4
TP (Traffic Program)
This is a flag to indicate that the tuned program carries traffic announcements. The TP flag should only be set on programs which dynamically
switch on the TA identification during traffic announcements. The flag shall be taken into account during automatic search tuning.
4.3.5
MS (Music/Speech)
This is a two-state signal to provide information on whether music or speech is being broadcast. The signal would permit receivers to be
equipped with two separate volume controls, one for music and one for speech, so that the listener could adjust the balance between them to
suit his individual listening habits.
4.3.6
AF (Alternative Frequencies)
The Alternative Frequencies are used to tell receivers what frequencies they can receive the radio station on. This facility is particularly useful
in the case of car and portable radios. For this to work, each transmitter must have RDS with the same PI code.
Important note: If second PI digit is set to zero (x0xx), this indicates that the station has only one transmitter and the AF list is ignored on most
receivers.
For further RDS service description visit the Website, section Support.