| 摘要 |
PURPOSE:To make calling between slave stations possible by constituting each slave station with a handset part, an operation part such as dial buttons or the like, a slave station control part which controls the whole of the slave station, and a means which inverts the transmission frequency of a transmitting part and the reception frequency of a receiving part. CONSTITUTION:When a slave station 34 calls a slave station 35, an operator switches interlocking switches 48, 49, and 50 to states opposite to those shown in the figure. Then, a filter 41 of 46MHz band which is used as a slave station receiving filter till then is connected to a slave station transmitting amplifier 38, and a filter 37 of 49MHz band which is used as a slave station transmitting filter till then is connected to a slave station receiving amplifier 42. Next, when the operator operates a talk switch after designating the slave station to be called out of plural slave stations by depression of a dial button in one digit, a slave station control part 46 releases muting of the transmitting amplifier 38 and outputs a slave station call signal including the designated slave station number to a slave station modulator 39 and transmits it in 46MHz band. |
