| 摘要 |
PURPOSE:To attain 2-way communication using a communication signal of a single frequency by avoiding mutual interference between transmission and reception in a same equipment with a prevention means. CONSTITUTION:A communication signal from a transmitter-receiver 20 being a slave set and a bypassed communication signal from a transmission section 14 in the inside are sent to a reception section 16 of a transmitter-receiver 10 being a master set and while a signal from the transmission section 14 is sent, a control circuit 15 stops the reception function of the reception section 16 to inhibit the output of its own transmission signal from the reception section 16. While the communication signal from the transmission section 27 of the transmitter-receiver 20 being the slave set is sent, the control circuit 28 stops a reception function of the reception section 21 to prevent the reception of its own signal. Thus, the transmission and reception in a single frequency are implemented without mutual interference. |
