Patent ID: 7031696

Claim:
A method of setting a timekeeper to the correct time by radiosynchronization, comprising the steps of: searching for the transmission signal of a frequency modulation transmitter whose spectrum contains RDS data; receiving a first transmission signal containing RDS data from a first frequency modulation transmitter; rejecting baseband audio spectrum received from said first transmitter except for the band of frequencies containing the RDS data; demodulating the RDS data and decoding first local time data from said first signal; comparing the internal time of said timekeeper to the decoded first local time data; in the event of any discrepancy between the first local time data and the internal time, receiving at least a second transmission signal containing RDS data from a second frequency modulation transmitter; rejecting baseband audio spectrum received from said second transmitter except for the band of frequencies containing the RDS data; demodulating and decoding second local time data from said second transmission signal; comparing the second local time data to the first local time data; setting the time of said timekeeper to cancel said discrepancy only if the first local time data is equal to the second local time data; and said timekeeper being adapted to be worn during use.