Optical fiber communication experiment: Topic significance: In digital communication, digital signals are transformed for a certain purpose in order to improve the efficiency of transmission. Through the experiment, master the basic code type transformation method in optical fiber communication. Requirements: Combined with relevant optical fiber communication courses, complete the items listed in the experimental content and write an experimental report. Experimental purpose: Understand the code type used in optical fiber communication, master the characteristics of CMI code, and understand the encoding and decoding implementation method of CMI. Experimental principle: CMI encoding is to alternately represent \"1\" with \"00\" and \"11\", while \"0\" is fixedly represented by \"01\". The decoding process is: when the clock and the signal code are aligned, if the input is \"11\" or \"00\", the output is \"1\", and if the input is \"01\", the output is \"0\". Experimental instruments and equipment: (1) Optical fiber communication experimental table (produced by Nanjing Institute of Communication Engineering). (2) Oscilloscope.
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