Output device of different sources of frequencies

Abstract

The invention discloses an output device of different sources of frequencies, and aims at providing the frequency source device of fast switching, high reliability and accuracy and high length stability. Two paths of satellite second signals, of different sources, are processed by a locking unit to generate two paths of phase-locked standard frequency signals, the two paths of standard frequency signals are output to an amplification output unit A and an amplification output unit B, one path of the signals is provided for a rubidium clock connected, in parallel, between a two-of-three switch and a first analog phase-locked loop PLL_A for frequency calibration, a rubidium clock clean up unit generates one path of standard frequency signals and transmits the path of signals to an amplification output unit c, two clean up oscillators in parallel connection lock signals of themselves in signals which take rubidium clock frequency signals as reference, output signals of the rubidium clock clean up is transmitted to the amplification output unit c, and thus, three paths of standard frequency signals of different sources are output.

Description

technical field [0001] The present invention relates to a frequency source, and more specifically, the present invention relates to a high-performance frequency generating device for receiving satellite signals. Background technique [0002] Traditional frequency standard equipment uses atomic clocks to generate various standard frequency signals. Because it must be connected to external reference signals, it must be fixed and installed, thus limiting its scope of application; and atomic clocks are high in cost, large in size, and affected by the environment. Large and low reliability; in addition, an external second signal must be connected to calibrate the frequency, so its structure is complex, its function is single, and its scope of application is limited; the short-term stability of atomic clocks is poor, and it takes a long time to stabilize to achieve a better index, which is quite inconvenient in actual use. If only a small crystal oscillator is used, although the s...

AI Technical Summary

Problems solved by technology

[0002] Traditional frequency standard equipment uses atomic clocks to generate various standard frequency signals. Because it must be connected to external reference signals, it must be fixed and installed, thus limiting its scope of application; and atomic clocks are high in cost, large in size, and affected by the environment. Large, low reliability; in addition, it must be connected to an external second signal to calibrate the frequency, so its structure is complex, the function is single, and the scope of application is limited; the short-term stability of the atomic clock is poor, and it takes a long time to stabilize to achieve a better index, which is quite inconvenient in actual use

If only a small crystal oscillator is used, although the short-term stability is good, the long-term stability is poor, easy to age, and the accuracy is low

If the satellite time service is used, although it is convenient, when the satellite signal is not good, the whole equipment will be in a paralyzed state, so its reliability is poor

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