发明名称 HEAD END DEVICE
摘要 PROBLEM TO BE SOLVED: To provide a head end device capable of distributing a television broadcast signal of a desired level to the terminal side, if the number of television broadcast signal channels increases, in a CATV system for optical transmission of multichannel television broadcast signals.SOLUTION: To an optical transmitter 10 which is the head end device, a CATV signal including a terrestrial television broadcast signal and television broadcast signals (BS, CS signals) from a broadcast satellite and a communication satellite are input. In the optical transmitter 10, a splitter 12 splits the input signals into the CATV signal and the BS, CS signals. After amplifiers 14, 15 amplify each split signal to a predetermined level, E/O converters 16, 18 convert the signal into an optical signal, so that the optical signal is transmitted to a subscriber residence through transmission optical fibers 22, 24 and optical splitters 26, 28.
申请公布号 JP2015070510(A) 申请公布日期 2015.04.13
申请号 JP20130204461 申请日期 2013.09.30
申请人 MASPRO DENKOH CORP 发明人 HIRAOKA YUICHI;WATANABE TATSUYA;NARUSE MASAHIRO
分类号 H04N21/61;H04B10/2575;H04H20/69;H04H20/79 主分类号 H04N21/61
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