| 摘要 |
PURPOSE:To eliminate the waste of an expensive coaxial connector and to attain echonomization by using a single input/output sharing terminal respectively for input terminal and output terminal. CONSTITUTION:Switches 5 and 11 are provided which uses one of output terminals 9 from a distributer 7 for an input/output sharing terminal 10, selectively switches an external signal inputted from the input/output sharing terminal 10 and an internal signal generated by a main signal generator 3, and switches and connects a selector 4 sent to the distributor 7 and the input/output sharing terminal 10 to the output of the distributor 7 and the input of the selector 4. Consequently, when the distributor is used for the main device, the input/ output sharing terminal 10 is connected to the distributor 7, and made to function as the output terminal, when it is used for a sub-device, the input/output terminal 10 is connected through an amplifier 2 to the selector 4, and made to function as the input terminal. Thus, the device costs can be reduced, and the device can be miniaturized. |
