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RDS Applications Supported
The following is an alphabetical listing of RDS applications that are fully supported by the
SmartGen Mini. The standardized RDS application abbreviation is followed by an expansion of
the application name and a short explanation of the function.
AF
List of Alternative Frequencies: A network broadcaster, or one with low-power rebroadcast
transmitters (translators) to fill holes in his coverage area, can include a list of all frequencies where
the identical program can be heard simultaneously. The RDS receiver (particularly the upscale car
radio) constantly searches for the best signal that carries the very same program. When a better
signal is found, the radio re-tunes with no noticeable interruption. The principal utility of this RDS
function is with European radio networks and US stations with 'translators.'
CT
Clock Time and date: Time and date codes should use Coordinated Universal Time (UTC) and
Modified Julian Day (MJD). If MJD = 0 the receiver should not be updated. The listener, however,
will not use this information directly and the conversion to local time and date will be made in
the receiver's circuitry. CT is used as time stamp by various RDS applications and thus it must be
accurate.
DI
Decoder Information: This is one of several 'flags' that convey yes/no or other very basic data.
This particular flag tells the receiver whether the broadcast is monaural, or is being transmitted in
any of several methods of stereo or binaural broadcasting. As many as 16 encoding options may
be accommodated! This is a rather esoteric function and, thus far, remains unused both in Europe
and in the US.
ECC
Extended Country Code: RDS uses its own country codes. The first most significant bits of
the PI code carry the RDS country code. The four bit coding structure only permits the definition
of 15 different codes, 1 to F (hex). Since there are much more countries to be identified, some
countries have to share the same code which does not permit unique identification. Hence there is
the need to use the Extended Country Code which is transmitted in Variant 0 of Block 3 in type 1A
groups and together with the country identification in bits b15 to b12 of the PI code render a unique
combination. The ECC consists of eight bits.
65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: +359 56 820027, Fax: +359 56 836700
E-mail: office@devabroadcast.com ,Web: www.devabroadcast.com
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