Design And Implementation Of Measure And Analyse System For Radio Electromagnetic Environment Managing

Measure and test of radio signals are the important task for radio managing station. The data from measure or test will be treated, and the conclusion will be drawn. Sometimes there are a mass of data need to be treated. Obviously, the way of treating the data quickly and clearly is very necessary. Today, the instrument is more and more compact and the methods to operation are more smarter. But there are some disadvantage. Sometimes we need more special way to some purpose. Some operation are complex too. The instrument's setting must be changed when there are some component such as a antenna or a transmission line replaced. The correction factors of a antenna or a transmission are mass but the instrument can not save it., so it is very labouredly that the factors are keyed in. A lot of task of the radio managing station are disposed on the field, it means that saving time is very important. The test data in the past maybe useful, and how to save data for analysis in the future is a matter we will deal with.In this dissertation the author proposed a "virtual instrument" which is based on a computer and a E7405A analyzer. The "virtual instrument" predigest the operation of E7405A to adapt the instrument to the demands of the radio managing station. The functions of the E7405 are grouped again according to the need of task. A method of detecting the intermodulation interference which are produced by paging transmitters is proposed in this dissertation too. In this dissertation, the hardware structure is presented at first, and the concept of virtual instrument, the layer's architecture of virtual instrument standard are described too. Secondly, some questions about intermodulation interference are presented and discussed. The spectrum model of intermodulation interference which are generated by paging transmitters are shown and derived. Finally, the software of the system, which is called "Measure and analyse system for radio electromagnetic environment managing", is described in this dissertation and the result of one test is shown.