Digiplexer 246 v2.5.x User Manual – 11/2010
Page 91
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APPENDIX C: RDS ACCRONYMS
AF
Alternative Frequency: transmitter frequencies from an encoded station in digital list form. Two
transmission methods are possible: method A (a single list of 25 frequencies) or method B (list of
frequency pairs)
CT
Clock Time. Can synchronize a clock in the receiver or the main clock in a car. Due to
transmission variations, CT can only be accurate within 100ms of UTC.
DI
Decoder Identification: a digital function which enables an RDS receiver’s audio level to be
adjusted according to the type of received audio (mono, stereo ...).
EON
Enhanced Other Network: a digital function which enables an RDS station to broadcast RDS
parameters to other stations. The following EON codes are used nowadays:
▪ EON-PI: broadcasting PI identity from another station.
▪ EON-PS: broadcasting the name from another station.
▪ EON-TP: if the flag is at 1, it indicates that the other station is likely to broadcast traffic
information.
▪ EON-TA: switches RDS receivers onto the local frequency of the other station when it
broadcasts traffic information.
▪ EON-AF: broadcasts the list of alternate network frequencies from the other station.
▪ EON-PIN: broadcasts the time and day of the other station’s program.
▪ EON-PTY: broadcasts the other station’s program types.
EWS
Emergency Warning System: an emergency transmission system for alerting the population
should there be any exceptional events, jeopardizing security (storms, a cyclone, earthquake,
serious industrial accidents ...). This means of alert used exclusively by Civil Security organizations
is developed primarily in geographical areas of high risk (overseas, seismic regions).
IH
InHouse: Transmission of data reserved for broadcasters’ internal needs (urban remote display,
remote monitoring, various controlling...).
M/S
Music/Speech: a digital flag which automatically modifies an RDS receiver’s audio volume level
according to the broadcast program (logical state 1 = musical program, logical state 0 = spoken
program).
ODA
Open Data Application: a system transmitting any data whose format is free and for which a
normalizing procedure is not necessary.
PI
Program Identification: a code identifying the received station
PIN
Program Item Number: a digital code indicating the time and day of broadcast programs.
PS
Program Service name: a station name of 8 characters
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