Satellite signal propagation delay test device
AssigneeViavi Solution Inc.
InventorsDavid ROYLE, Mikhail CHARNY, Joseph Gomez, Roland Stooss
Life of this patent
Estimating the term…
Abstract
A test device determines a Global Navigation Satellite System (GNSS) signal propagation delay in a GNSS signal distribution system (GSDS) for a radio access network, and can further perform long-term tests on a GSDS without having access to a GNSS satellite. The test device includes a GNSS receiver and a clock that can be re-tuned to accommodate performing tests on the GSDS.
Claims18
1-13. (canceled)
A test device operable to generate timing and synchronization signals based on Global Navigation Satellite System (GNSS) signals, comprising:
- a GNSS receiver to:
- connect to a timing signal source;
- enter a survey mode to determine a position of the GNSS receiver;
- enter a timing mode to generate a one pulse per second (1 PPS) signal based on first GNSS signals and the timing signal source;
- a clock tunable to a phase and a frequency of the 1 PPS signal when placing the GNSS receiver in a holdover mode;
- a data storage to store the phase of the 1PPS signal;
- and
- a processor to place the clock in a frequency-only tuning mode to re-tune the clock to a frequency of a frequency source when the GNSS receiver is connected to the frequency source.
A method for controlling a clock of a test device having a GNSS receiver, the method comprising:
- generating, by the GNSS receiver, a one pulse per second (1PPS) signal based on first GNSS signals received from a timing signal source;
- placing the GNSS receiver in holdover mode to tune a clock of the test device to the 1PPS signal;
- storing a phase of the 1PPS signal in a data storage device of the test device;
- and
- placing the clock in a frequency-only tuning mode to re-tune a frequency of the clock to a frequency source.
Dependencies are inferred from the claim text.