| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical reception system capable of turning a coaxial cable connecting an optical receiver and a television receiver and an announcement broadcast receiver into a single line without being accompanied by modification of the optical receiver or loss of signals, and to provide a switcher for the optical reception system. <P>SOLUTION: In an optical reception system 1 comprising an optical receiver 10 for converting optical signals transmitted through an optical transmission line to RF signals or FM signals and outputting them, an announcement broadcast receiver 20 for receiving the RF signals or the FM signals converted in the optical receiver 10, and a television receiver 30 for receiving the RF signals converted in the optical receiver 10, a switcher 40 is disposed between the optical receiver 10 and the announcement broadcast receiver 20 and the television receiver 30 and comprises an RF input terminal for receiving input of the RF signals, an FM input terminal for receiving input of the FM signals, an output terminal for outputting the RF signals or the FM signals to the announcement broadcast receiver 20 and the television receiver 30, and a changeover switch for selectively switching one of the RF input terminal and the FM input terminal and connecting it to the output terminal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
