Development of high quality time synchronous device based on GPS

A new time synchronous device based on GPS(Global Positioning System)is introduced.Its principle and characteristics are discussed.By using accurate frequency multiplication,OCXO(Oven Con trolled Crystals Oscillator),and real-time error compensation,this time synchronous device has high accuracy and high reliability.It maintains the high accuracy output pulses when GPS is out of work and provides the powerful foundation for the accurate and reliable real-time state monitoring in power system and all high accuracy synchronous sampling systems.