RDS Codec DMC 01 Coder and decoder in one a bench model or system rackmount DMC 01 represents the third generation of RDS equipment from Rohde & Schwarz. Thanks to the know-how gained over many years and the use of advanced technology, it was possible to produce an extremely compact and favourably priced device. Its range extends from general RDS applications via paging, TMC and EWS functions through to the use as an RDS/VRF system unit in broadband communication / systems and low-power FM transmitters.