Intelligent Controls Oriented Spectrum Analyzer

In analysis and transaction of signals, spectrum analyzer is a classical and important instrument which is mainly used to analyze the time domain wave, amplitude, spectrum domain wave, demodulating analysis, digital filtering, correlate analysis, transfer function and Coherence Function of signals. And the technology of Virtual Instrument is a new achievement combined by test and instrument technology in the process that the developing hardware, software and bus technology of computer penetrate into other fields. And the intelligent controls-oriented virtual instrument is a fire-new model in development of Virtual Instrument. It bring a fire-new appearance to spectrum analyzer that using the ideal of Intelligent Controls-oriented Virtual Instrument in the manufacture and design of it. The paper introduces the general ideal of Intelligent Controls-oriented Virtual Instrument. What the ideal is that intelligent cells of instrument can compose various instruments, and can show them to user on PC, which are derived from virtual controls by combine virtual control and functions of instruments through functions endowing. The intelligent cells of instrument named intelligent virtual controls is a kind of living virtual part endowed instrument functions, which describe the appearance and the essential of Intelligent Controls-oriented Virtual Instrument.The mode of intelligent virtual controls consists of the dimension, the shape, the color, the structure and the description of intelligent controls. And abstract them as the properties of controls, which can be modified by users externally through the interface provided by system. Then intelligent controls not only have flexible functions, but also have variable appearance. This paper exemplifies Button, Switch and Slider control to demonstrate the design and manufacture of controls. The mode of function controls in intelligent virtual instrument describes the functions inside instrument. The various functions inside the virtual spectrum analyzer introduced in the paper is time domain wave analysis, FFT transfer, IFFT transfer, Cross analysis, and so on, which are all described in function controls.Finally, this paper introduce the assemble of intelligent controls-oriented virtual instrument. And use classical signals and industrial practices to demostrate the accurate of virtual spectrum analyzer.