The atomic clock was first used to explore the essence of the universe, not to be used for time keeping. Until scientists studied the basic characteristics of atoms and nuclei, the technology of magnetic resonance was invented. This technology can measure the natural resonance frequency of atoms, and the natural resonance frequency is very high. It is especially suitable for making high-precision clocks, so the atomic clock has become the development of high precision. The basis of the clock.

In the field of time counting, the clock is a daily tool used by people. There are errors in the accuracy every day. This is enough for people's daily use, but it can not be satisfied in the fields of production and scientific research with higher precision. In order to solve the problem of high accuracy, people made atomic clocks, and then invented cesium atomic clocks, hydrogen atomic clocks and rubidium atomic clocks according to the principle of atomic clocks. The highest accuracy of cesium atomic clocks is often used in GPS Beidou satellite systems.

The cesium atomic clock controls the calibration of electronic oscillators and clocks by using the electromagnetic waves leaped by the internal electrons between two levels. The stability of cesium atomic clock is 20 million seconds. The hydrogen atomic clock controls the calibration of quartz clocks by the electromagnetic wave generated by the jump of atomic level, and its stability changes to 1/1000000000 seconds per day. Rubidium atomic clock is simpler and more compact than other atoms. Rubidium atomic clock can make the output frequency of rubidium oscillator synchronize with the satellite Se Yuanzi Zhong Xinhao, and provide stable frequency signals.

Atomic clocks can be applied to punctuality as well as frequency standards. In terms of punctuality, for example, equipment SYN2136 Beidou NTP network time server, which is built with a time keeping rubidium atomic clock, tame rubidium clock, when the device does not have real-time satellite time signal, the device uses the rubidium atomic clock for punctuality. The SYN3204 GPS Beidou domesticated rubidium atomic frequency standard is a high-precision frequency standard equipment developed by Xi'an, which can be traced to the GPS cesium atomic clock. The output frequency signal has high accuracy and stable output for a long time. The device can provide the cesium clock frequency standard and replace the high cost cesium clock, which is a cost-effective device.

SYN3204 GPS Beidou domesticated rubidium atomic frequency standard, based on satellite signal to provide cesium bell level stable frequency standard. The device has 10MHz sinusoidal signal output, 1PPS pulse signal and RS232 time signal, and 10MHz sinusoidal signal output can also be selected as 5MHz and 1MHz, and the frequency accuracy is less than 1E-12. SYN3204 GPS Beidou domesticated rubidium atomic frequency standard can quickly lock signals, and provide stable and reliable signals, widely used in aerospace, satellite, navigation, time-frequency measurement, synchronous broadcasting, measurement and control, communications, astronomy, meteorology and other industries.