Radio Data System (RDS)

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Radio Data System (RDS)
RBDS.png
Frequencies 65 MHzMegaHertz (MHz) 10^6 Hz65,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
65,000 kHzKiloHertz (kHz) 10^3 Hz
,108 MHzMegaHertz (MHz) 10^6 Hz108,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
108,000 kHzKiloHertz (kHz) 10^3 Hz
65,000 kHzKiloHertz (kHz) 10^3 Hz
65 MHzMegaHertz (MHz) 10^6 Hz
108,000 kHzKiloHertz (kHz) 10^3 Hz
108 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 65 MHzMegaHertz (MHz) 10^6 Hz65,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
65,000 kHzKiloHertz (kHz) 10^3 Hz
- 108 MHzMegaHertz (MHz) 10^6 Hz108,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
108,000 kHzKiloHertz (kHz) 10^3 Hz
Mode DSBDual Side Band Modulation
Modulation PSKPhase-Shift Keying
ACFAutoCorrelation Function 87.6 msmilliseconds (.001 of a second) (On station ID)
Bandwidth 4000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).kHzKiloHertz (kHz) 10^3 Hz
0.004 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.004 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.004 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description Radio Data System (RDS) and its North American variant, Radio Broadcast Data System (RBDS), are data modes transmitted on subcarriers of commercial FMFrequency Modulation radio station transmissions.
I/Q Raw Recording
Audio Sample
Radio Data System (RDS) and its North American variant, Radio Broadcast Data System (RBDS), are data modes transmitted on subcarriers of commercial FM radio station transmissions. Both RDS and RBDS are identical modulation wise but they have some differences in the format of the data sent. RDS is published worldwide as IEC standard 62106.

The RDS system is Dual Side Band modulated onto the 57 kHzKiloHertz (kHz) 10^3 Hz subcarrier of a commercial FMFrequency Modulation transmitter. The RDS mode transmitted is actually one PSKPhase-Shift Keying signal identically duplicated and mirrored across the 57 kHzKiloHertz (kHz) 10^3 Hz carrier for robustness and redundancy. This individual PSKPhase-Shift Keying signal is about 2.2 kHzKiloHertz (kHz) 10^3 Hz wide, and the combined DSBDual Side Band Modulation modulation of RDS is about 4 kHzKiloHertz (kHz) 10^3 Hz.

The RDS system uses Binary PSKPhase-Shift Keying, with a data rate of 1187.5 bpsBits per second (bps). RDS is used to send data such as time, text data on radio programming, programming type, alternative frequencies, and traffic information.

RDS-2 has been announced and is set to replace RDS.

The RDS subcarrier can be seen at 57 kHzKiloHertz (kHz) 10^3 Hz subcarrier on this multiplex demodulated sideband of a commercial FMFrequency Modulation broadcast.

PrevMPXWFM.jpg


Samples[edit]

Raw USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) sample of the DSBDual Side Band Modulation signal:

Raw RDS
Raw rds.jpg

The USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) portion of the DSBDual Side Band Modulation RDS signal only:


A good example of a mixdown of a FMFrequency Modulation audio to hear the RDS: Mixdown Sample

Decoding Software[edit]

Hobby Level Software

Video Examples[edit]

Additional Links[edit]

Additional Images[edit]