With the rapid development of science and technology, time and frequency devices are also progressing to meet the needs of all fields. Time and frequency equipment is not only simple timing, but also has the functions of safety protection, relay alarm, unified time and so on. In some industries that require relatively simple time service, ordinary time and frequency devices can be satisfied, but in military, electric power, scientific research institutions, aviation, aerospace and other fields, high precision clock equipment, built-in rubidium atomic clock, and time information provided by rubidium atomic clock are used as the benchmark.

The rubidium atomic clock has high precision. The rubidium atomic clock is composed of a rubidium quantum part and a voltage controlled crystal oscillator. The error signal is sent back to the voltage controlled crystal oscillator, and the frequency is adjusted to lock the specific energy level of the rubidium atom to the corresponding frequency. Rubidium atomic clock is composed of single chip microcomputer, servo circuit, microwave frequency multiplication circuit, frequency modulation and frequency multiplier integrated circuit. The basic working principle of rubidium clock is similar to that of cesium clock, and the resonance frequency of energy level transition is used as the benchmark. Atoms absorb or release electromagnetic energy around the energy difference of different electronic layers around the nucleus. When atoms move from a high energy state to a low energy state, they release electromagnetic waves. The characteristic frequency of the electromagnetic wave is fixed, which is what people call the resonance frequency. By using this resonant frequency as a metronome, atomic clocks can be used to determine time.

In the use of time-frequency devices, it is necessary to receive satellite signals and conduct real-time matching to ensure the accuracy of time. However, some time frequency devices are not able to receive satellite signals all the time because of restrictions on the use of premises. However, if the satellite signals are not received, there will be some errors in time, which will lead to inaccurate time. The device is internally equipped with a temperature compensated crystal oscillator, a constant temperature crystal oscillator, a rubidium atomic clock, and so on. When the satellite signal is not received, the equipment is punctuality based on the information provided by the rubidium atomic clock.    

With the development of science and technology, rubidium atomic clock has been widely used in some high-precision equipment. In order to meet the market demand, China began to develop rubidium atomic frequency standard in 1970s. The previous rubidium atomic clock has a large volume. After 90s, with the rapid development of information technology, there was a miniaturization demand for rubidium atomic frequency standard. Therefore, China will focus on the development of small rubidium atomic oscillations. Device. In recent years, with the needs of national defense construction, rubidium atomic clock needs to meet the requirements and requirements in aviation, aerospace, military equipment, radar and other fields. This has raised high requirements for the performance and accuracy of rubidium atomic clocks, and is also conducive to promoting and developing the rubidium atomic clock in China, so that we have our own technology and do not rely on foreign imports no longer be restricted.

At present, a high performance rubidium atomic oscillator developed by Xi'an synchronous Electronic Technology Co., Ltd. with a research institute, SYN010B low cost rubidium atomic clock, which uses the ruby atom "0-0" hyperfine level transition frequency 6834.6875MHz, locks the quartz voltage controlled crystal oscillator VCXO, and outputs an accurate and stable 10MHz standard. It is an ideal product to replace the small volume atomic clock abroad. 。 This product is widely used in power, telecommunications, aviation, aerospace, broadcasting and television, and time management.Metrological calibration Radar wireless base stations, RF test equipment and other fields requiring high performance rubidium oscillators.

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