| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately correct a time, even in an installation position where a reception condition of a radio wave for correcting a radio-controlled time piece is worse. <P>SOLUTION: A sales data processor is provided with a clock circuit 25 for clocking the time. A radio-controlled clock circuit 29 receives a radio wave including a time data for correcting the time, and measures radio wave intensity. A CPU 20 transmits the time data obtained by receiving the radio wave in the radio-controlled clock circuit 29, and a radio wave intensity data indicating the radio wave intensity, to other device through a communication control part 28. The CPU 20 receives also a time data and a radio wave intensity data transmitted from the other device, compares the intensity indicated by this radio wave intensity data with he reception intensity of the radio wave received by own device, and corrects the time of the clock circuit 25, based on the time data obtained from the other device, when the reception intensity of the radio wave in the other device is higher. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
