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).