| 摘要 |
PROBLEM TO BE SOLVED: To reduce a reception ratio in intermittent reception and to reduce power consumption by realizing the non-operation state of a synchronizing code detecting part after establishment of synchronization and immediately stopping the operation of a radio demodulating part at the time of judging the absence of the address of its own frame or the absence of pull-out during a code word receiving operation. SOLUTION: When judgement information indicating transition to a pre-ample detection mode is transmitted from a mode judging part 22, an intermittent receiving timing generating part 23 outputs a power source ON/OFF signal (b) for turning ON the power source of an RF part during 16 bits with the point of time as start. Then, when information indicating transition to a synchronizing code detection mode is communicated from the mode judging part 22, the power source of the RF part is turned ON during the maximum 576 bits from the point of time as start. When a synchronizing code is detected, transition to the synchronizing mode is realized, and when any condition of pull-out is not established, and its own address is not present, the power source of the RF part is turned OFF. |
