A variety of standard frequency signal frequency source equipment

Abstract

The invention discloses frequency source equipment for outputting various standard frequency signals, and aims to provide frequency source equipment with high reliability, good length stability and a wide application range. The frequency source equipment for outputting various standard frequency signals, which is disclosed by the invention, is implemented by the following technical scheme that: a receiving switching unit transmits two paths of selected satellite second signals from different sources to a locking unit, two paths of satellite second signals from different sources are processed by two independently working analog phase-locked loops, a crystal oscillator and an distributor in the locking unit to generate two paths of phase-locked standard frequency signals, and two paths of phase-locked standard frequency signals are respectively output to a signal processing unit A and a signal processing unit B; and one path of phase-locked standard frequency signal is subjected to frequency correction by a rubidium clock connected in parallel between a three-selection two-open device and a first analog phase-locked loop PLL_A, a rubidium clock phase locking unit generates a path of standard frequency signal, the standard frequency signal is transmitted to a signal processing unit c by a frequency phase locking unit formed by a parallel loop comprising two single-pole double-throw switches, so that three standard frequency signals from different sources are output.

Description

technical field [0001] The present invention relates to a frequency source device that provides signal sources for various electronic devices, and more specifically, the present invention relates to a portable multifunctional high-stable 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 ...

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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