Method for controlling VSAT satellite communication L-band down converter

Abstract

A method for controlling a VSAT (Very Small Aperture Terminal) satellite communication L-band down converter, comprising the following steps of: step 1, system initialization; step 2, entering the waiting state; and if an input command is detected in the waiting state, starting step 3; step 3, command determination, and if the determination is true, starting step 4, otherwise, returning to the step 2; step 4, command processing; and step 5, control event processing, and returning to the step 2 if the operation on the down converter is finished. The control event processing in the step 5 comprises processing of the following events: preselector setting, medium-frequency bandwidth setting, AGC / MGC (Automatic Gain Control / Manual Gain Control) control, first local oscillator frequency control and second local oscillator frequency control. With the method for controlling the VSAT satellite communication L-band down converter provided by the invention, smart control is realized for receiving of the input instruction, automatic control of related modules of the down converter, and corresponding parameter adjustment; real-time operation is realized for the input instructions; the parameter adjustment time is shortened; and the operation reliability and keenness of the down converter are enhanced.

Description

technical field [0001] The invention belongs to the field of satellite communication, and relates to a control method of a VSAT satellite communication L-band down converter. Background technique [0002] VSAT (Very Small Aperture Terminal, Very Small Aperture Antenna Earth Station) for satellite communication has the characteristics of strong flexibility, high reliability, convenient use, and small stations can be directly installed on the user end. Using VSAT user terminals can be directly connected to the computer network, Complete communication tasks such as data transfer, file exchange, and image transmission, thus getting rid of the problem of long-distance communication ground interruption stations. So it is a good choice to use VSAT as a dedicated long-distance communication system. The so-called small aperture specifically refers to the small aperture of the satellite signal receiving antenna, usually only 1.2 to 2.4 meters. [0003] In VSAT satellite communicatio...

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Problems solved by technology

[0004] At present, the use of satellite communication has been widely used as a means of radio and television transmission coverage in China. According to the IEEE 521-2002 standard, the L-band refers to the radio wave band with a frequency of 1-2 GHz. The down-converter of the satellite communication L-band is used to receive satellite transmissions. The L-band signal is down-converted to the commonly used intermediate frequency band to achieve better demodulation and transmission effects. If the operation and control of the down-converter all rely on manual control, it is time-consuming, laborious and error-prone.

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