| 摘要 |
PURPOSE: A system for distributing satellite broadcasts for households use is provided to prevent a signal distortion caused by noises in processing of distributing/transmitting the satellite broadcasts, and to simplify a circuit design. CONSTITUTION: A system for distributing satellite broadcasts for households use comprises a satellite tuner and many satellite broadcasting receivers. The satellite tuner has one satellite antenna and the satellite broadcasting receivers are connected to the satellite tuner through a cable. The satellite tuner comprises an I/Q satellite broadcasting signal generator, a demodulator(104), and a transmission interface unit(106). The generator converts a Ku-band satellite broadcasting signal received through a satellite antenna into tens of MHz intermediate frequency, and generates satellite broadcasting signals of the modulated I/Q signal. The demodulator demodulates the satellite broadcasting signals to original signals, and generates transport streams of digital. The transmission interface unit interfaces the transport streams in serial with a high speed, and distributing/transmitting to the satellite broadcasting receivers through the cable. Each satellite broadcasting receiver comprises a receiving interface block(202), a tuning performer(204), and a supplier.
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