| 摘要 |
A radio display pager includes an antenna (4) and front end (5) and receives a series of frames from a paging station (1) synchronized to the seconds of the local standard time. Each frame contains a frame synchronizing signal and a frame position signal indicating the position of the frame within the series, each of the frames being synchronized with a local standard time of the paging station. A frame counter (9) increments a count value in synchronism with the reception of each frame synchronizing signal detected by a frame sync. detector (6) and produces an output when the count value reaches a predetermined value. The frame counter is reset to an initial value in response to the reception of a predetermined frame position signal which occurs at 1-minute intervals, as detected by a frame identifier decoder (7). A time-keeping circuit (15) counts locally generated clock pulses from a clock source (18) to display the time of day on a display unit (19). The time-keeping circuit is responsive to the output of the frame counter for calibrating the time of day to the local standard time. <IMAGE> |
