9.2. RBDS and RDS
Radio Broadcast Data System (RBDS) is commonly used for FM broadcast in North America, while the
Radio Data System (RDS) is implemented in Europe. In 1998, the two standards were largely unified.
Both systems are implemented as standard features on Technalogix FM transmitters, including the
control, generator, and interface.
RBDS/RDS uses a subcarrier to embed the FM signal with information. This can be used to transmit
time, station identification, programming information and more.
To control the RBDS/RDS connect to the USB port on the back. This will look like a COM port to your
computer. Drivers should install automatically once you have connected if you have an internet
connection or can be found here:
http://www.ftdichip.com/Drivers/D2XX.htm
To interface with the RBDS/RDS you need to install the Magic RDS software. Magic RDS software is
found here:
http://www.pira.cz/rds/MagicRDS_Setup.exe.
General operating questions are answered here:
http://www.pira.cz/rds/show.asp?art=magic_rds_how_to.
The RBDS/RDS subcarrier level can be adjusted using R88 on the FM Exciter 2.02 circuit board. It should
be set between 1.5 and 10% modulation.
If not needed, disable the RBDS/RDS on the INPUTS screen to give you the maximum available
modulation.
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