Model: 72MHz Analog Clock
When a clock is first powered on, it automatically initializes its set up and searches for a signal to receive its time. The transmit (broadcast) schedule of the main Transmitter also determines when a clock will receive a signal.
Analog Clock signal search frequency:
At six pre-scheduled times a day, at 2:01 AM/PM, 6:01 AM/PM, and 10:01 AM/PM clock time (not the actual time of the day), a clock's receiver turns on to search for a Transmitter signal to receive a time update, starting with the previously stored channel number. If a signal is not received from the first channel, the clock scans all channels to search for a signal.
The type of antenna determines a Transmitter's broadcast transmit schedule, which should be taken into consideration when installing new system devices. System devices receive a time update during its scheduled signal search or when powered on from a broadcasting Transmitter.
1 Watt Transmitter with an internal antenna: Transmits (broadcasts) a time signal continuously, 24 hours a day.
Transmitter with an external antenna: transmits (broadcasts) synchronized time to the system clocks and devices from the 39th to the 6th minute of the next hour and changes to a standby mode during the 7th to the 38th minute of the hour (standard broadcast schedule). During initial power-up, the Transmitter transmits a signal for 8 consecutive hours. After the 8 hour power-up period, the Transmitter reverts to its timed transmit schedule. Power-cycling a Transmitter will set it into an 8 hour continuous transmit schedule.
In the event of a facility-wide power outage, a Transmitter with an External Antenna will broadcast for 8 hours upon the restoration of power. This will synchronize all devices. In the event power to a Transmitter is shut off and turned back on (power cycle), the Transmitter will broadcast continuously for 8 hours. Power cycling the Transmitter can be used to set/reset system devices.
Do not power cycle a Transmitter when it's in an error status - red LED is flashing; refer to the troubleshooting topics to resolve the error status.
Clock install considerations: Transmitter with external antenna
If installing clocks after the initial Transmitter 8 hour power-up transmission, there are three options.
Install clocks between 39 minutes past the hour and 6 minutes after the next hour. They will set right away.
Install the clocks at any time of the day. They will set their time at the next 39 minutes after the hour.
Power cycle the Transmitter. It will then broadcast for 8 consecutive hours and clocks will set immediately on power-up.