一种铷原子钟双钟热备相位无扰切换系统的设计

A design of dual rubidium clock hot standby system with a switching method of no-phase-perturbation

为了满足时间统一系统中主钟与备份钟的时间、频率信号在切换时的连续性要求,提出并实现了一种铷原子钟双钟热备相位无扰切换系统的技术方案,阐述了双钟间频率与相位同步和信号无扰切换的方案原理,给出了系统组成与主要控制程序的框图及测试结果。采用本方案可使主钟与备份钟输出信号的时差小于±0.55 ns,并实现了信号的无扰切换,满足了工程应用的要求。

A design of dual rubidium clock hot standby system with a no-phase-perturbation switching method is proposed and realized in order to meet the continuity requirement of the time/frequency signals in the timing system. The method of the frequency and phase synchronization and the n0-phase-perturbation switching between the master clock and the slave clock are described. The system composition, the key control program and the test result are given. By adopting this proposed design the time difference between the output signal of the master clock and that of the slave clock is within±0.55 ns, and the signal switching without phase perturbation is realized, meeting the requirements of engineering application.