| 摘要 |
PURPOSE:To attain effective utilization of a radio wave by decreasing a transmission output of a control signal to a value of nearly the same degree or smaller than the transmission output of a voice signal to receive surely the voice signal at a location receiving the control signal. CONSTITUTION:The frequency of a synthesizer 9 is controlled to be a control channel by a control circuit 11 of a radio equipment adopting the transmission power control system and an output of a power amplifier in the inside of a transmission section 10 is controlled to be a prescribed output. In transmitting a radio signal on a voice channel, the circuit 11 controls the synthesizer 9 to a voice channel frequency and also the transmission section 10 controls the output of the voice channel mode to be a prescribed output and applies the result to an antenna common use device 15. Then the control signal service area 5 of a radio equipment C is set slightly smaller than the voice service area 6, the control service area 7 of the radio equipment D is set slightly smaller than the voice service area 8, the transmission range of an unnecessary radio wave is narrowered and the radio wave is utilized effectively. |
