With the development of science and technology, people's demand for time accuracy is higher and higher. Therefore, some simple mechanical clocks will be replaced by higher precision clocks. In order to achieve higher time accuracy, the timing and type of clock need to be changed, such as Beidou school server, CDMA clock server and GPS clock server.Among them, the Beidou school server device refers to the time server that receives the China Beidou satellite navigation system and provides time service.

The Beidou school server device takes Beidou satellite signal as the standard time source. When the Beidou school server is equipped with a built-in satellite receiver, it can receive the satellite time signal, then transmit the satellite signal through the network to the terminal equipment, and calibrate the time of the terminal equipment, so as to synchronize the time between the terminal equipment in the local area network and the Beidou time server device and reach the terminal set. The timing is consistent with that of the satellite. In the Beidou school, the server has a high precision constant temperature crystal oscillator. The constant temperature crystal oscillator has a time keeping function. When the satellite is out of lock or the time server is power-off, it does not need to worry about the time error, and ensures the precise time in the premises. The working principle of the Beidou school server is as follows: after receiving the satellite signal, the time transmitting antenna is transmitted to the time server by coaxial cable. After receiving the satellite signal, the time server transfers the satellite time to the terminal equipment through the output of the network port.

At present, Xi'an synchronous Electronic Technology Co., Ltd. produces Beidou time server, such as SYN2151 NTP time synchronization server, built-in GPS Beidou satellite signal receiver, timing accuracy is less than 30ns, tracking sensitivity is less than -160dBm. The time synchronization server network output is 10M/100M/1000M adaptive and the network timing accuracy is 0.5-10ms. Support Web management software monitoring and management. SYN2151NTP time synchronization server also has, firewall protection SYN-flood defense, software and hardware watchdog design, QoS function, Chinese and English selection function, monitoring NTP network timing operation state, network diagnosis and other functions, can be used for various industries to meet various customer needs.

At present, there are many suppliers in the market of the Beidou school server device, but for the function of the server device in Beidou University, the general time service function can be satisfied, but under special requirements or functions, some suppliers can not be satisfied. The Beidou time server device of Xi'an synchronous Electronic Technology Co., Ltd. has added other functions and many options, such as antenna amplifier, antenna feeder arrester, high precision timing receiver, dual power supply, rubidium atomic clock, tamed constant temperature crystal oscillator module, tame rubidium clock module, etc., for different needs of customers, Beidou school server device can give schools, hospitals, standards. Time service in areas such as sites, aerospace, stations and research institutes.

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