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Synchronized time schedule overview

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The OneVue Sync 72MHz system provides synchronized time over the 72MHz wireless radio frequency. The main Transmitter transmits (broadcasts) a time signal that is received by the system Clocks and Repeater Transmitters. Both the Transmitters and Clocks have a time sync schedule that varies by model.

The following details the Transmitter and Clock schedules.

Transmitter time transmit (broadcast) schedule

The type of antenna determines when a Transmitter transmits synchronized time updates, which should be taken into consideration when installing new devices.

  • 1 Watt Transmitter with an internal antenna: Transmits (broadcasts) a time signal continuously, 24 hours a day.

    A Repeater Transmitter transmits the time received from the main Transmitter, which is then received by clocks within its range.

  • 1, 5, or 30 Watt Transmitter with an external antenna: Transmits a time signal 24 hours a day ONLY between the 39th to the 6th minute of each hour, and changes to a standby mode and does NOT transmit a time signal during the 7th to the 38th minute of each hour (per FCC requirements). This transmit schedule can only be adjusted by Primex when necessary for additional compliance with FCC/ISED requirements.

Note

In the event of a facility wide power outage or a Transmitter is power-cycled, a Transmitter with an external antenna will transmit continuously for 8 hours upon restoration of power. Power-cycling a Transmitter can be used to set/reset the system devices synchronized time.

Do not power-cycle a Transmitter when its Caution yellow LED or Error red LED indicator is illuminated - be sure to resolve the issue before power-cycling.

Clock install considerations: Transmitter with external antenna

If installing devices after a Transmitter's initial 8 hour power-on, there are three options to ensure a device receives a time update during installation.

  • Install devices between 39 minutes past the hour and 6 minutes after the next hour and devices receive a time update when powered on. For example, between 9:40 AM and 10:05 AM.

  • Install the devices at any time of the day. Devices will receive a time update at the next 39 minutes after the hour.

  • Power-cycle the Transmitter. It will then transmit for 8 consecutive hours and devices receive a time update when powered on.

Clock time sync schedule

Each clock model has a schedule, which is when the clock's receiver turns on to search for time signal from a Transmitter. When a clock receives a time signal, it synchronizes its time to the time received from a Transmitter. When a clock is first-powered on or is powered on and off, it automatically searches for a time signal to set its time.

  • Analog Clocks: 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),

  • Digital Clocks/Timers: every 10 minutes on the 5's (5, 15, 25, 35, 45, 55 minutes) of the hour.

Clock loss of time signal (visual indicators)

When a clock has not received a valid time signal from a Transmitter for three consecutive days, it displays a visual signal loss indicator. Although the clock may display the correct time, it's not synchronized and its time may drift.

  • Analog Clock: its second-hand advances and pauses continuously (stepping)

  • Digital Clock/Timer: its colons flash (between the time and hour)

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