The technical standard of the multi-channel PCM sound broadcasting system using communication satellite was decided in January 1990, based on the similar system for broadcasting satellite service which had been developed by NHK and confirmed by experimental transmission using BS-2 satellite. Many important technical parameters were decided to be consistent with those in the broadcasting satellite system, for example, modulation method, transmission biterate, sound coding and signal format. The prototype common indoor receiving unit for both Systems has been developed. The characteristics of the receiving unit and results of laboratories tests are described in this paper.
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