Time and frequency synchronisations of equipment at different locations
First Claim
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1. Apparatus for providing synchronization of equipment located at a number of mutually remote locations, comprising at each location:
- a disciplined frequency reference;
a satellite navigation system receiver for providing satellite navigation system data; and
processing means for receiving satellite navigation system data from the satellite navigation system receiver, the apparatus being further provided with a network interconnecting the mutually remote locations, characterized in that the respective processing means are operable to exchange satellite navigation system data between themselves over the network, said respective processing means being employed to calculate a common reference time, based upon the satellite navigation system information received from the associated satellite navigation system receiver and from other locations in the network.
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Abstract
Method and apparatus for providing accurately synchronised timing signals at mutually distant locations employs a GPS or similar receiver at each location. These receivers are interconnected by a communications network, and exchange data over the network to agree a common timing reference.
14 Citations
11 Claims
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1. Apparatus for providing synchronization of equipment located at a number of mutually remote locations, comprising at each location:
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a disciplined frequency reference;
a satellite navigation system receiver for providing satellite navigation system data; and
processing means for receiving satellite navigation system data from the satellite navigation system receiver, the apparatus being further provided with a network interconnecting the mutually remote locations, characterized in that the respective processing means are operable to exchange satellite navigation system data between themselves over the network, said respective processing means being employed to calculate a common reference time, based upon the satellite navigation system information received from the associated satellite navigation system receiver and from other locations in the network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for providing synchronized timing signals at mutually remote locations, comprising the steps of:
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providing a satellite navigation system receiver at each location;
providing a frequency reference at each location;
providing a frequency output signal from each frequency reference;
providing control circuitry at each location;
and in the each of a plurality of the mutually remote locations, receiving, in the control circuitry, time data from the corresponding satellite navigation system receiver and further sets of time data from at least one other remote locations over a communications network;
calculating a common reference time based on the received sets of time data; and
applying a delay to the timing signal of at least one of the locations, thereby bringing the frequency output signals into synchronisation synchronization. - View Dependent Claims (10)
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11-12. -12. (canceled)
Specification