| 摘要 |
PURPOSE:To use two frequencies but not use a repeater station to make calls between optional required stations out of plural stations possible by locking each station to a transmission frequency in the holding state for transmission and reception. CONSTITUTION:A transceiver in each station having two frequencies F1 and F2 is locked to the frequency F1 in the holding state for transmission and reception. When a station A transmits a signal with the frequency F1, the receiving frequency of the station A is automatically locked to the frequency F2 for a certain time. When a station B receives the signal of the frequency F1 from the station A, the station B has the transmission frequency locked automatically to the frequency F2 for a certain time. Consequently, a simultaneous speaking line due to two frequencies is set between stations A and B. Stations A and B are set to the holding state a certain time after the communication between stations A and B based on these operations is terminated; and when a station which wants to communicate starts transmission, said operations are performed to make the communication between this station and a proper optional station possible. |
