A GPS time server is probably the most secure, accurate and reliable method of receiving a UTC time signal (Coordinated Universal Time). However, some problems do occur but fortunately the solutions are relatively straightforward.
One of the most common causes for problems with a GPS time server is in failure to receive a signal. While the GPS transmission is extremely impervious to weather interference and as most GPS time servers can receive a signal from between one and twelve different satellites, the transmission is very robust. If a signal is not being received then the first point of call is the antenna.
A GPS time server antenna needs to have a clear view of the sky this is because the signal from the satellites works by direct line-of-sight. While the signal is robust avoid placing the transmitter near to a satellite dish or other broadcast aerial as this could interfere with the signal. Also be aware of foliage which can creep over the antenna and block the signal. Some GPS antennas can work through a window, however the window must not have any coating on the glass such as E-glass and there must still be a direct line of sight from the window to the satellite.
The cable connecting the antenna can also cause problems. Ensure there are no breaks and that the cable is not too long for the specifications of the antenna. Too much cable and the signal may not have enough strength to make the distance.
A much rarer problem for a GPS time server would be trouble with the receiver. Fortunately most dedicated GPS time servers have a reset and test mode. If you are confident that the antenna is in fully working and operational order then reset the receiver and run the test mode.
If all the above fails it is possible that the unit is faulty and should be returned to your manufacture or supplier.
