| 摘要 |
<p>PURPOSE:To omit manual channel switching operation to speak with an optimum transmission output by automatically monitoring the presence or the absence of reception signals of plural preliminarily set channels and automatically tuning radio equipment to the channel where the reception signal is detected. CONSTITUTION:A reception detecting part 1 monitors the presence or the absence of the input signal of each of plural preliminarily set reception channels; and when detecting the input signal, the reception detecting part 1 sends its channel information to a frequency control part 2 and sends reception input level information to a transmission output control part 3. The frequency control part 2 tunes a reception part 4 and a transmission part 5 to the channel in accordance with inputted channel information, and the tuning input is demodulated by the reception part 4 and the demodulated signal is outputted to a reception part 6. When a user starts transmission from a transmission part 7 for the purpose of responding, the transmission output is started by the transmission output control part 3 and the transmission output level is adjusted in accordance with reception level information, and the output of the transmission part 5 is supplied to an antenna 9 through an antenna multicoupler part 8.</p> |
