The official market launch of DSR was in 1989 and was significantly influenced by the German Sponsored by the Federal Post Office. The transmission took place via the Copernicus satellite or the signal was also fed digitally via the cable network. Other providers of such devices were, for example, the companies Telefunken and Tech nisat. However, DSR broadcasting did not catch on and was too expensive and time-consuming. DSR was used exclusively for audio transmission - there was no transmission of image signals. At the same time as the introduction of DSR, digital radio for terrestrial reception (DAB) has already been developed. Above all, Grundig was significantly involved in the development of DAB reception and end devices. Together with Telefunken , Grundig was also one of the pioneers in the development of DSR end devices and also one of the first providers of end devices. There were hardly any non-European providers for DSR reception. Already at the end of the nineties (1999), the broadcasting of DSR programs was stopped. Since that time the DSR devices are UNUSABLE! They cannot be used for any existing transmission formats (VHF, DVB, DAB2). There are only a few combination devices (e.g. Grundig ST 303) which additionally contain an analog VHF receiver.