| The artificial satellite is the important means that radio and television transfers,characteristic having the "lucency transmission". In recent years, our countrybroadcast TV program accepts the illegal signal disturbance many times. This hasbrought forward higher request to the engineers and technicians who works at theearth station right away.It has required that the upkeep personnel improves safetyunceasingly broadcasting an ability, guarantee broad masses of the people listens inthereby regularly to watch broadcast TV program.The main purpose of this paper is to further understand the system parameters,master key link. Research and analysis of the key indicators of the system to enhancethe understanding of influencing factors on system reliability. And improve thetechnical level, the level of knowledge and emergency level of the maintenanceengineers who work at Tianjin satellite earth station. In order to be able to in thefuture a more thorough job of maintenance and repair work on the satellite earthstation.The main part studies method in this paper is to use theoretical analysis andreality measures the way testing result being in progress having a general comparison.First, some systematic important parameter index: Stray, phase noise, three orderinterchange,3dB bandwidth analyses as well as the amplitude-frequencycharacteristic is in progress and studies. Explain its practical meaning, measure laterby applying testing instruments. It will test result carrying out analysis. By the factthat the testing to the index analysing, pointing out whose influencing factor, adjustthe relevance parameter and interpose, observe to the effect testing result. Find out theoptimum system index and relevance parameter ultimately.Based on the index system of theoretical analysis and practical measurement, thesystem parameters are optimized, the system parameters has been further improved,the anti-interference performance of reinforced. Finally the Tianjin TV earth station isto be able to work in very good state of the system. It is to be ensure the safebroadcasting and improve work efficiency. |
