A Shortwave Prognostic Selector Control System

Abstract

The invention relates to a control system for short-wave preselector, which includes a single-chip microcomputer control circuit, a transceiver conversion circuit, a band conversion circuit, a frequency hopping filter, a decoder, a broadband low-noise amplifier and a receiver protection circuit; the single-chip microcomputer control circuit is electrically connected to the The main control circuit of the external short-wave radio station, the transceiver conversion circuit, the band conversion circuit, the frequency hopping filter and the decoder; the transceiver conversion circuit includes the first, second, third and fourth transceiver conversion circuits; the band conversion circuit includes the first and the second band conversion circuit; the frequency hopping filter includes the first and the second frequency hopping filter; the decoder is electrically connected to the single chip microcomputer control circuit and is respectively connected to the first and the second frequency hopping filter through the relay; the protection circuit is electrically connected It is connected to the radio frequency input end of the preselector, and is electrically connected to the third transceiver conversion circuit at the same time. The invention has simple structural design, stable use, strong anti-interference ability, simple control, fast frequency hopping speed, low power consumption and low 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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