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GPS Smart Clock Technology The GPS receiver actually learns the behavior of the 10 MHz oscillator over time - discovering the temperature and aging characteristics of the oscillator. In the event of a complete loss of GPS signal the receiver goes into Holdover Mode and the microprocessor will control the oscillator based on what it has learned. The result is an extremely accurate reference even without GPS sync. The typical holdover uncertainty is less than 2 microseconds error during the initial 24 hour period without GPS. |
