Compensation Processing And Tame Maintenance Technology Of Rubidium Atomic Clock

Temperature and aging drift make output frequency of the rubidium atomic clockunstable, and affect the accuracy and stability of rubidium atomic clock.A mathematical model was established after analyzing the temperature feature ofrubidium atomic clock. MCU controlled the DDS to compensate the temperature ofrubidium atomic clock. In addition, with the analysis of aging feature of rubidiumatomic clock, we researched the drift compensate algorithm and founded the model ofcompensation. And then, the feasibility of aging drift compensation of rubidium atomicclock was proved.With the time-frequency signal production and maintenance system compensatingthe10MHz signal of reference output, digital high-resolution DDS corrected the outputreference signal according to the feedback information, to reduce the aging drift andambient temperature and other factors effect on the frequency source. Digital PLLlocked crystal oscillator to rubidium atomic clock, keeping the better phase noise levelof crystal oscillator in the free-running state, and improving the original proximal phasenoise level of rubidium atomic clock. Finally, system got out the high stability and lowphase noise10.23MHz signal.