The AR133-03 is a ruggedized version of the AR133 Rubidium Frequency Standard, specifically designed for extreme airborne applications. A vibration isolator included in the AR133-03 enables the unit to maintain high frequency stability and accuracy under vibration as may be experienced in severe environments such as airborne platforms. AR133-03 operates successfully at vibration levels of up to 9 g RMS and up to 17 g RMS non-operational
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AR133-03 features very fast warm-up and can be disciplined to an external 1PPS source from GPS/GNSS or other sources. It is one of the smallest, high performance disciplined rubidium frequency standards available today. The AR133 family of Rubidium oscillators is comprised of a unique DFLL (Digital Frequency Lock Loop) where a high performance crystal oscillator is locked to the rubidium atomic line using an embedded microprocessor and a special patented algorithm.