| 摘要 |
PURPOSE: To simplify the system constitution by preparing plural signal switches each having plural input and output terminals and connecting an output terminal of each signal switch to an input terminal of another signal switch respectively. CONSTITUTION: The signal switches 30 and 31 have plural input and output terminals respectively. Then an output terminal 2 of the switch 30 is connected to an input terminal 1 of the switch 31, and an output terminal 1 of the switch 31 is connected to an input terminal 4 of the switch 30. Therefore, one of input signals 1 to 3 which are inputted to the switch 30 is selected and outputted to the terminal 2 through the switching. Thus this output signal can be inputted to the terminal 1 of the switch 31. On the other hand, the switch 31 is controlled to select the input signal 1 and to send it to the terminal 2. Thus a monitor 53 can select and reproduce the signals 1 to 3 which are inputted to the switch 30 and also can select and reproduce one of input signals 2 to 4 which are inputted to the switch 31. As a result, the monitor 53 can reproduce six input signals in all. |
