GPS based networked time synchronised unit

摘要

GPS referenced signals are generated by equipment at a plurality of locations and are used to provide synchronisation of a common time reference over a network. The output signal will be either a frequency or a 1 pulse per second (1PPS) signal where the offset between the signals may be calculated and used as the synchronisation signal. There are three modes of operation: single mode where the unit acts as a GPS Disciplined Oscillator (GPSDO); two and multiple modes where one unit acts as a master unit and the others as slave units.