主从同步“松耦合”锁相技术

摘要

结合主从时间同步跨入纳秒级精度的趋势，本文分析了主从同步中偏差和噪声类型，描述了采用“松耦合”锁相技术对同步偏差进行修正并抑制传输噪声．“松耦合”锁相技术在实验室测试和实际工程应用中都得到了较好的效果，实验室测试主从相对频率偏差优于±5 E-14/天（单槽恒温晶体钟）；工程应用中（铷原子钟）时间间隔偏差优于±20 ns/7天，相对频率偏差优于±3．3 E-14/7天．%Combined with the trend of the master-slave synchronization in the nanosecond precision ,this paper analyzes the deviation and noise type in the master-slave synchronization ,describes how to use the“Loose Coupling”Phase Lock Technique to rectify deviation and restrain noise .”Loose Coupling”Phase Lock Technology has achieved better result in the laboratory test and practical project application ,master-slave relative frequency deviation in the laboratory test is better than ± 5E-14 a day (single slot thermostatic crystal clock );the time interval deviation in project application is better than ± 20ns 7 days(rubidium atomic clock ) , the relative frequency deviation is better than ± 3 .3E-14 7 days(rubidium atomic clock) .