Eye for testing the quality of digital transmission channel. Since the transmission band limit superimposed noise makes the difference between 1 and 0 becomes smaller. At decision point receiver, the 1 and 0 differences with the eye eyes to represent the size of the opening, the image is very intuitive and practical. First generate a random binary sequence of square wave, filtered through a raised cosine filter, filter out high frequency components of the square wave after drawn eye. Data variables in the program formed in the Workspace in D. By instruction sim ( eye ) workspace data D fed to the eye instrument EyeDiagram, get eye instrument display eye diagrams (right).

基带传输系统的特性用眼图测量\eyee.mdl
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基带传输系统的特性用眼图测量

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