QUESTION:
What is IRIG-B? what is it used for?
ANSWER:
IRIG-B is serial time signal used to synchronize one clock to another through a coaxially cable. The signal contains a full calendar time encoded by amplitude modulation on a 1kHz sine wave carrier. Along with the data message are periodic sync marks which allows the recipient to align its clock to the sender. IRIG-B and other standard serial time codes were developed by the US military decades ago, and are still the most popular means for transferring time from device to another in the military, aerospace and power utilities industries.
Some applications include synchronizing measurement equipment at a missile test range, finding faults in power grids by triangulating from voltage spike detectors in the power grid, and synchronizing clock displays to a GPS timing receiver.
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