Introduction This Report describes the essential elements of broadcasting??satellite system design and their relationships. The object of the Report is to assist the system designer@ frequency planner@ and spacecraft and earth??station engineer in their choice of system characteristics. Such choices@ as is the case in the design of systems in general@ are bounded by various constraints: limitations imposed by the state of international agreement and@ most important@ by considerations of system economics. Other relevant information on the systems aspects of the broadcasting satellite service are given in the Recommendations and Reports listed below; - Terminology Recommendation 566 - Television broadcasting systems Recommendation 650@ Reports 1073 and 1074 - Sound broadcasting systems Report 955 - High definition television broadcasting systems Report 1075 - Feeder links Report 952 - Modulation@ multiplexing and coding Recommendation 651@ Reports 632@ 953 and 954 - Transmitting and receiving antennas Recommendation 652@Report 810 - Earth receiving equipment Report 473 - Satellite technologies Report 808 - Interservice frequency sharing Report 634