L9200 DXO ModuleTame the Crystal Oscillator

Overview

The L9200 disciplined crystal oscillator module consists of a timing-type GPS Beidou satellite module, a logic processing unit, and a high-precision disciplined crystal oscillator. The satellite module is used to receive satellite time and high-precision 1PPS signals, while the disciplined crystal oscillator is used to handle the phase and frequency synchronization of 1PPS and 10MHz sine waves. This device employs a 1PPS phase-locked technology that combines frequency modulation and phase modulation: the 1PPS time information is obtained by dividing the 10MHz signal output by the disciplined crystal oscillator by 10,000,000 and fusing it with the 1PPS generated by the GPS module, resulting in a final 1PPS and 10MHz sine wave with excellent short-term and long-term stability characteristics. The technology combining frequency modulation and phase modulation is used for frequency control, ensuring both frequency accuracy and consistency between the frequency phase and the 1PPS phase. In the event of abnormal satellite signal reception or short-term satellite loss of lock, the disciplined crystal oscillator can still provide 10MHz sine waves and 1PPS signals. This module boasts ultra-low phase noise and excellent autonomous timekeeping capabilities, making it suitable for use in complex and harsh platforms such as vehicular, airborne, and shipborne applications, providing high-precision time and frequency reference signals for the system.

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