| 摘要 |
A radio-controlled timepiece can adjust the time with a short reception process while also reducing the likelihood of incorrect adjustment. The radio-controlled timepiece has a reception control means 31 , time information updating means 32 , time adjustment storage means 33 , and time display means. The reception control means 31 has a simple time adjustment means 330 that is driven within a predetermined time of the last successful signal reception, and a normal time adjustment means 320 that is driven when this predetermined time has passed. The simple time adjustment means 330 has a pulse timing detection unit 331 , a offset calculation unit 332 , a offset evaluation unit 333 , and a seconds information adjustment unit 334 . The pulse timing detection unit 331 detects the reference timing, which is the timing of the rising edge or falling edge of rectangular wave pulses in the received time code. The offset calculation unit 332 calculates the difference between this reference timing and the timing of the seconds unit in the internally kept time. The offset evaluation unit 333 determines if this offset is within a tolerance range. The seconds information adjustment unit 334 adjusts the seconds unit of the internal time based on the offset if the offset is within the tolerance range. |
