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GPS Network Time Server
SALES: 0118 965 5100
Operating faults
All indicators out indicate that the clock is not powered.
Under normal operating conditions, the clock is synchronized to UTC time via GPS. Under
such condition, the "LOCKED" and "POWER" indicators are green, while the "1pps"
indicator flashes at a one second rate.
If one of the following faults occurs during the starting period, both "LOCKED" and
"POWER" indicator go red:
•
GPS receiver positioning fault;
•
Frequency pilot fault;
•
Frequency division circuit fault;
•
Fault or impedance mismatching of the frequency or synchronization outputs;
•
Synchronization or frequency performance fault*
* The estimated phase shift is greater than 1 ?s or the estimated frequency deviation is greater
than 110-9.
Under such condition, the clock no longer synchronizes with the GPS source. In this case,
contact the Black Box technical support.
In continuous operation, the same faults cause the "POWER" indicator to go red.
Setting out of service
To set the GPS Network Time Server out of service, set the switch to position O and
disconnect the "DC Power" input (J2).