Patent ID: 7738322

Claim:
A radio-wave receiver comprising: counting means for counting time; receiving means for receiving a transmitted standard radio wave that includes time data modulated in units of a frame; time correcting means for correcting the time being counted by the counting means based on the time data of the standard radio wave received by the receiving means; error range calculating means for calculating a range of an error involving the time being counted by the counting means based on a designed time-counting accuracy of the time counting means and a time elapsed from a previous time correction by the time correcting means to the time being counted by the counting means; first determining means for determining whether the range of the error calculated by the error range calculating means is within 5 seconds; reception starting means for, when it is determined that the calculated range of the error is within 5 seconds, causing the receiving means to receive the standard radio wave; identification data detecting means for detecting a particular one of items of identification data disposed at time intervals of 10 seconds in the frame of the standard radio wave received by the receiving means; and second determining means for, when the particular one of items of the identification data is detected, determining whether a numeral of a units digit of a “seconds” part of the time being counted by the counting means is in a range of 5 through 9 or in a range of 0 through 4, wherein the time correcting means comprises digit numeral correcting means for, when it is determined that the numeral of the units digit is in the range of 5 through 9, incrementing a numeral of a tens digit of the “seconds” part by one and changing the numeral of the units digit to 0, one second after the particular one of items of the identification data is detected, and when it is determined that the numeral of the units digit is in the range of 0 through 4, changing the numeral of the units digit to 0 without incrementing the numeral of the tens digit, one second after the particular one of items of the identification data is detected.