| 摘要 |
PURPOSE:To know the accuracy of the displayed time by providing a means of displaying that the time is normalized by radio waves. CONSTITUTION:When an announcement of time is detected, the second counter of an hour-minute-second counter 5 is reset by a detection signal 3a and integrated second errors are made zero. On the other hand, the detection signal 3a is also inputted to a month-data memory 10 and the contents of a month-data- day of the week counter 6 are stored. When a switch 11 is turned on, the latest data normallized by radio waves in place of the today's month and data is displayed 8. It is equally well to display this by marks in place of the data normallized by radio waves. |
