| 摘要 |
PURPOSE:To avoid the consumption of wasteful electric power due to repeating the operation trying to receive long wave reference wave in the case where reception of the long wave reference wave is unavailable by stopping the receiving operation on the basis of the reception environment and restarting it. CONSTITUTION:A reception circuit 3 starts up by receiving the initiation and termination signals from a CPU1 and obtains a time cord TC in the signal from an antenna 2 to send to the CPU1. A frequency divider circuit 6 counts the signal from an oscillation circuit 5 and keeps on sending the signal M for a minute to a timer counter circuit 7. The counter circuit 7 counts the signal M and corrects the present time data. In the case of bad reception circumstances that the reception is failed for four times in succession (that is, the reception is failed for three hours), the receiving function is stopped and the wave correction process is not executed. If the time data receiver is moved while the wave correction process is stopped, for example a man carried it by hand, the acceleration induced by the movement is detected with an acceleration sensor 10 and the reception is restarted. |
