FAA L-864 Medium Intensity Obstruction Light
Universal AC & Universal DC Models
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Optional GPS Synchronization
Avlite has utilized the latest advancements in GPS technology to develop an internal
synchronization system that can be incorporated into the lights. Using overhead satellites,
multiple obstruction lights set to the same flash pattern will flash in unison.
No additional power supplies, aerials or control systems are required, and with its
microprocessor- based system, the GPS option is specifically designed to provide
maximum reliability and performance over a wide range of environmental conditions.
Operating Principle
Each light operates independently and requires no operator intervention. A minimum
of 4 satellites need to be in view for the built-in GPS receiver to collect time data. At
dusk, the light sensor will turn the light on. If time data is available, the light will come on
synchronized to every other light with the same selected flash code.
Synchronization is achieved using an internal algorithm based on the highly accurate
time base and time data received from the satellites. The satellite data is provided from a
number of earth stations using atomic clocks as the time base. Continuous self-checking
ensures that the light will continue to run in synchronization.
Light Activation
At power-up the microprocessor checks that the internal GPS module is programmed
correctly and is able to provide valid time base and time data.
Once outside with a clear view of the sky, valid data should become available within 20
minutes.
Daylight Operation
During daylight hours, the microprocessor is in idle mode to reduce power consumption.
Time data continues to be updated once per second. The microprocessor will automatically
exit the idle mode as soon as dark conditions are detected.
