TIME SYNCHRONIZATION SYSTEM

摘要

PURPOSE:To allow the system to synchronize a time of a slave set with a time of a master set accurately even in the case of changeover of transmission lines by correcting a delay time of a transmission line interconnecting the master set and the slave set so as to synchronize the time of the slave set with the time of the master set. CONSTITUTION:A reference time signal 6 from a reference time generating section 3 of a master set 1 is sent to a slave set 2. The slave set 2 returns the received signal 6 to the master set 1. A time interval measuring device 5 of the master set 1 measures a time difference between the sent signal 6 and the returned signal 6 and sends a half of the difference to the slave set 2 as time information A. A time interval measuring device 14 of the slave set 1 measures a time difference between the signal 6 from the master set 1 and a reference time signal 17 outputted from a reference oscillator 13 in the slave set 2 and uses the result as time information B. A time information arithmetic section 15 obtains a difference between the time information sets A and B and sends the result as time information C to a time information correction section 16. The correction section 16 subtracts a correction value from the information C as control information 21 and sends it to a phase control section 12. The control section 12 applies phase control of the signal 17 based on the information 21 to generate a synchronizing time signal 28 synchronously with the time of the master set 1.