Radio Data System (Rds) Demodulator

RADIO DATA SYSTEM (RDS) DEMODULATOR sources: European Broadcasting Union; Philips Components design: J. Bareford After several years of study and practical tests, the Radio Data System (RDS) is currently implemented on all BBC/IBA VHF FM broadcast transmitters in the United Kingdom. Other countries in Europe are following now that all technical and functional specifications of the system have been finalized by the European Broadcasting Union (EBU). The primary aim of the RDS system is to permit the realization of automatic tuning features in car radios. This article provides an introduction to the operation of RDS, and presents a demodulator as a basis for experimental reception of this new service. Most motorists are well aware that reception of VHF FM signals is troublesome in a moving car because of signal reflection, the limited range of the transmitters, and noise induced by the engine and other moving parts. The Radio Data Sys- tem should alleviate some of the plight motoris...