Communications: electrical – Continuously variable indicating – With meter reading
Patent
1993-08-11
1996-01-02
Bowler, Alyssa H.
Communications: electrical
Continuously variable indicating
With meter reading
34081514, 455 512, G05B 2302, G08B 522, H04B 100, H04B 700
Patent
active
054812585
ABSTRACT:
A clock synchronization system for synchronizing a number of paging stations (24) with a system controller (23). Each paging station has a clock that includes a counter (52) that indicates the current local time and which is sequentially incremented by a counter advance signal applied thereto. A voltage controlled oscillator (58) generates the clocking signal that controls the advancement of the counter. A CPU (50) in the system controller monitors the time indicated by the counter and compares it to timing information received from a system clock. The timing information includes a time mark and a time mark send time. The system clock transmits to each paging system the time mark. At a future time, the system clock transmits the time mark send time which is the precise time at which the time mark was transmitted. The paging stations each measure the time interval between the time at which the time mark arrived and the time at which the time mark was transmitted by the system clock period. By subtracting the time at which the time mark was transmitted by the system clock and the propagation time to each paging station, each paging station can determine and correct the error in its clock.
REFERENCES:
patent: 4177466 (1979-12-01), Reagan
patent: 4607257 (1986-08-01), Noguchi
patent: 4709402 (1987-11-01), Akerberg
patent: 4815110 (1989-03-01), Benson et al.
patent: 4818998 (1989-04-01), Apsell et al.
patent: 4849993 (1989-07-01), Johnson et al.
patent: 4850032 (1989-07-01), Freeburg
patent: 4908629 (1990-03-01), Aspell et al.
patent: 4968966 (1990-11-01), Jasinski et al.
patent: 5023900 (1991-06-01), Tayloe et al.
patent: 5060240 (1991-10-01), Erickson et al.
patent: 5077759 (1991-12-01), Nakahara
patent: 5090025 (1992-02-01), Marshall et al.
patent: 5125009 (1992-06-01), De Vilbiss
patent: 5153874 (1992-10-01), Kohno
patent: 5162790 (1992-11-01), Jasinski
patent: 5220676 (1993-06-01), LoGalbo et al.
patent: 5257404 (1993-10-01), Goreham et al.
patent: 5261118 (1993-11-01), Vanderspool, II et al.
patent: 5280629 (1994-01-01), Lo Galbo et al.
patent: 5327581 (1994-07-01), Goldberg
patent: 5335357 (1994-08-01), Fennell et al.
patent: 5365516 (1994-11-01), Jandrell
Fawcett Glenn S.
Glessner David W.
Witsaman Mark L.
Bowler Alyssa H.
Glenayre Electronics, Inc.
Rinehart Mark H.
LandOfFree
Method and apparatus for coordinating clocks in a simulcast netw does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for coordinating clocks in a simulcast netw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for coordinating clocks in a simulcast netw will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-238444