The clock is a clock system which is composed of a clock and a clock. Zi Zhong is a device for displaying time. It can be divided into pointer clock, digital clock and LED sub clock. The mother clock is a kind of time service equipment, the master clock is generally called time server, clock server, time synchronization server, clock synchronization server and so on.

The way of combining Zi Zhong and mother clock is called the mother clock system. In general, the timing method of the sub clock system is to transmit the time information through the network, so the time service mode is simple and convenient to use. The time information provided by the clock is the satellite time and transmitted to the sub clock through the network time service. This time information is more accurate.

The application of the sub clock system is usually made up of network sub clock and time server. In the application process, the network sub clock can be selected according to the scene, pointer network sub clock, digital network sub clock, astronomical combat clock, operation room operation room clock and so on. The time server can also be selected according to the different scenarios and environments. GPS Beidou dual satellite timing, or in some industries restricted by GPS satellites, can choose Beidou satellite to give time. The time server can also change the number of network timing devices to gigabytes or megabytes according to the number of time service devices. According to the type of time service, we can increase network port information, serial port information, B code information, PTP information and so on.

The sub clock system can be applied to some industries and places that require precise timing and time service to be unified, such as hospitals, schools, factories, stadiums, toll stations, public security systems, scientific research institutions and so on. With the wide and varied demands, the clock system is also being improved and upgraded. The company time server adds firewall protection, SYN-flood defense, network status query and other functions, and the sub clock has a variety of display content and size, and the sub clock uses acrylic panels, which is bright and beautiful. Therefore, the company's mother clock can be widely used in various places and some special secrecy industries.

The SYN2151 NTP time synchronization server receives the standard time information of the GPS Beidou satellite signal through the GPS timing antenna, receives the GPS and Beidou satellite signals, and transmits the time information through the switch through the network output, and transfers it to the NTP network sub clock SYN6109, the computer system, the monitoring equipment, the weak electronic system, and other needs of the time service. The clock is connected to the clock network management system, which is used to manage and maintain the system, and to synchronize the LAN and the computer to achieve time synchronization. And when the mother clock does not have a satellite signal, it can carry out the time keeping through the internal temperature compensation crystal oscillator, so as to ensure the accuracy of time. The clock source can also choose constant temperature crystal oscillator, rubidium atomic clock, tame rubidium clock module and so on.

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