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AR133-20 Ultra High Stability Rubidium Frequency Standard

AR133-20 Image

AccuBeat’s AR133-20 is a compact Rubidium Frequency Standard providing a 10 MHz output and with exceptionally ultra-high stability (ADEV) of less than 5E-12 @ 1 second. This compact unit measures only 1" x 3" x 3" and in addition to the high stability it also provides ultra-low phase noise, improved 1PPS accuracy and low g sensitivity.


As part of the AR133 family of products it also has all the other features of this Rubidium Frequency Standard such as AccuBeat’s 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. The algorithm optimizes the performance vs. external disturbances, improves temperature stability, and enables very fine digital frequency control.

AR133-20 Data Sheet pdf

AR133-20 Data Sheet (please refer to page 2 for the AR133-20 unique specifications)

Key Features

▶ Ultra-high Short  Term Stability (ADEV) :   <5E-12 @ 1s

▶ Ultra-low Phase Noise: -157 dBc/Hz @ 10kHz

▶ Time Accuracy (disciplined to 1PPS): 7ns RMS (typical)
▶ G Sensitivity of internal OCXO:  ±3E-10/g   

▶ Outputs: 10 MHz and 1PPS

▶  Supply voltage: 15 VDC

▶  Steady state power < 8.25W

▶  Power-saving mode  < 1.8W Steady State (option)

▶  Size: 77 x 77 x 25.4 mm (3” x 3” x 1”)


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