| 摘要 |
PURPOSE:To turn off a power source and to decrease energy consumption until the transmission of next present station information by detecting electric field deterioration by means of the electric field level of a received signal. CONSTITUTION:As soon as the signal is received by a receiving part 1, the electric field level of the received signal is detected by an electric field detecting part 2, on the other hand, a station information deciding part 3 checks whether or not slave station information indicated by the received signal is that to its own station. When it is recognized to be the information to its own station, the power source is turned off for a prescribed time. When it is not recognized to be the information to its own station, whether or not the detected electric field is a reference value or below is checked. When it is the reference value or below, a power source 4 of the receiving part 1 is turned off for the prescribed time. |
