Multi-area radio pager with repeated resynchronizations interpos

Details Multi-area radio pager with repeated resynchronizations interpos Multi-area radio pager with repeated resynchronizations interpos

1998-03-26

2000-05-02

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

455 381, 455343, 379 57, G08B 522

Patent

active

060577835

ABSTRACT:
A multi-area pager includes a scan list table having multiple entries for storing data representing frequencies and area codes and an area information table for storing data representing a frequency and an area code associated with a received paging signal. When an out-of-range indication is given after synchronization sequences are not properly detected, the power-consuming receiver of the pager is briefly deactivated and then controlled according to the frequency data of the area information table to demodulate a paging signal. An area code of the signal is compared with that of the area information table if a synchronization sequence is detected. If that sequence is not detected or if the area codes do not match, the receiver is controlled according to the frequency data of a specified entry of the scan list table to demodulate a paging signal. Again, an area code of the signal is compared with that of the specified entry if a synchronization sequence is detected. If that sequence is not detected or if the area codes do not match again, a subsequent entry of the scan list table is specified, the receiver is again controlled, after a brief turn-off interval, according to the frequency data of the area information table. If there is a match between the area codes, the area information table is updated with the data of the specified entry.

REFERENCES:
patent: 4914649 (1990-04-01), Schwendeman et al.
patent: 5532683 (1996-07-01), Kondo

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