Shortwave prognostic selector control system

Abstract

The invention relates to a shortwave prognostic selector control system. The shortwave prognostic selector control system comprises a single chip microcomputer control circuit, transceiving conversion circuits, band switching circuits, frequency hopping filters, a decoder, a broadband low-noise amplifier and a receiving protection circuit; the single chip microcomputer control circuit is electrically connected to an external short-wave radio station main control circuit, the transceiving conversion circuits, the band switching circuits, the frequency hopping filters and the decoder separately; the transceiving conversion circuits comprise first, second, third and fourth transceiving conversion circuits; the band switching circuits comprise first and second band switching circuits; the frequency hopping filters comprise first and second frequency hopping filters; the decoder is electrically connected to the single chip microcomputer control circuit, and correspondingly connected to the first and second frequency hopping filters separately through a relay; and the receiving protection circuit is electrically connected to the radio-frequency input end of the pre-selector, and electrically connected with the third transceiving conversion circuit at the same time. The shortwave prognostic selector control system disclosed by the invention is simple in structural design, steady to use, high in anti-interference capability, simple to control, rapid in frequency hopping speed, and low in power consumption and bottom noise.

Description

technical field [0001] The invention belongs to the technical field of digital tuning and frequency hopping, and in particular relates to a control system of a short-wave preselector. Background technique [0002] With the development of frequency hopping technology, shortwave preselectors are widely used in military communication systems. It performs matching transmission for frequencies in the passband, and performs reflection attenuation for frequency mismatch in the stopband, thereby realizing signal spectrum filtering. The short-wave preselector is generally connected between the radio antenna switch and the RF amplifier, and is mainly used to improve the selectivity of the receiver. The preselector can effectively suppress out-of-band interference, improve and improve the receiver's electric field radiation sensitivity and other indicators, and ensure The receiver can work normally in complex electromagnetic environment. The short-wave post-selector is generally conne...

AI Technical Summary

Problems solved by technology

[0008] To sum up, the design scheme of the frequency hopping filter circuit leads to cumbersome and repetitive production processes, resulting in an increase in the failure rate of the memory, which affects the reliability of the short-wave pre-selector, which also affects the reliability of the configured communication equipment and changes the prognosis. Selector control circuit design scheme, the method of removing the memory in the frequency hopping filter can greatly improve the reliability of shortwave radio stations

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