| 摘要 |
The present invention relates to an electronic timekeeping device capable of decoding a broadcast Radio Data System (RDS) signal and selling an internal clock in response to the decoded RDS signal and to a method of using such a device. The apparatus (1) comprises a processor (18), a receiver (10), a decoder (10), and a clock (20,22). The receiver (10) receives in parallel or sequentially from an RDS broadcast system (6) a plurality of RDS signals (4). The decoder (10) decodes RDS time signals from the received RDS signals (4). The clock (20,22) generates an internal time signal (22). The processor (18) establishes from the distribution of RDS time signals which RDS time signals are reliable and which are not reliable. The arrangement is such that the internal time signal (22) is reset using one or more of the RDS time signals that have been established to be reliable and not using those that have been established as being unreliable. |
