High-stability combined region time service frequency generation equipment

Abstract

The invention discloses high-stability combined region time service frequency generation equipment and aims to provide time service frequency generation equipment with high reliability, high length stability and a wide application range. The invention adopts the technical scheme that a receiving switching unit inputs two paths of selected satellite second signals from different sources into a locking unit to carry out frequency locking, two paths of phase-locked standard frequency signals generated by the locking unit and are respectively output to a signal processing unit A and a signal processing unit B; one path of satellite second signal is also used for carrying out frequency correction on a rubidium clock connected in parallel between a three-selection two-open device and a first analog phase-locked loop PLL_A, and one path of standard frequency signal is generated and transmitted to a signal processing unit C; and the signal processing units carry out signal shaping, amplification, shunting and coding on three paths of standard frequency signals from different sources, the obtained signals are subjected to frequency division, output to a far-end time service unit and are converted into optical signals by an optical-electrical converter, and the optical signals are transmitted to an equipment machine room by one or multiple paths of optical fibers and then are converted into electric signals, and the electric signals are transmitted by an antenna so as to complete a clock time service of a receiving end.

Description

technical field [0001] The present invention relates to a frequency source device that provides signal sources for various electronic devices. More specifically, the present invention relates to a portable multifunctional high-stable frequency generating device capable of receiving satellite signals and providing regional timing. Background technique [0002] With the continuous deepening of electronic construction in various fields, its business processing and scientific management decisions are increasingly dependent on computers. In various fields, various real-time services require accurate, reliable and recognized time, while general computers and interconnected devices have no clear index requirements for the design of time stability, and the clock oscillators of these devices work without proofreading. In the case of free oscillation, a considerable error will occur with UTC time after long-term accumulation, resulting in inconsistent time between devices in the netwo...

AI Technical Summary

Problems solved by technology

[0003] 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

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