Rack Mount GPS Matser Clocks.
AE2412R-427A and AE26R-427A.
The AE Series, GPS Master Clock constantly analyzes the data from selected NMEA sentences for signal quality, and to be sure it has locked on to at least three satellites. It then extracts UTC from these data for use by the AEXX-427A. A ?Locked On? indication is provided by illuminating the decimal point on the sixth digit. This may take several minutes the first time the unit is powered on, since it will not have any history of satellite locations for your location in its memory. Time is then updated each minute at the 30th second.

A programmable, time zone offset is entered to provide local time for any world time zone. This offset is added to the Hours of the UTC. The RS232 serial data output provides local time, date, Julian date, and day of the week data that can be displayed on unlimited numbers of AE Series, or CC2000 Series Remote Displays. For analog clock correction and bell ringing applications, this output can be connected to an MC Series Master Clock with the RS232 I/O Option installed. MC Series Master Clocks provided clock correction outputs such as 59TH Minute correction for three-wire, synchronous, analog secondary clocks, and bell circuit outputs.

During power outages, the AEXX-427A Master Clock will not display or transmit its time to the remote clocks. However, it will keep time using a 0.005% crystal for up to four hours on a rechargeable battery backup system. In addition the GPS-427A Antenna/Receiver will keep time and memory for up to six months. Upon the return of power, the system will display the backup time of the AEXX-427A until the next update at the 30th second of the minute. It will then display the backup time of the GPS-427A Antenna/Receiver until the system locks on again, typically within 60 seconds of the return of power to the system.