| 摘要 |
PURPOSE:To reduce current consumption by shortening the operating time of a reception part by saving the power to a reception part at the time of receiving the signal of its own transmission rate when other transmission rate signals and noise signals are received. CONSTITUTION:The time after the power supply to a reception part 2 is started by a control part 11 is counted in a timer part 11. When a fixed time passes, a transmission rate detection part 5 is made to operate, and when it is judged that the transmission rate of a reception signal is not its own transmission rate in the transmission rate detection part 5, the power supply to the reception part 2 is made to interrupt and the power supply time of a battery is shortened. |
