光纤有线电视之讯号量测与障碍分析.PDF

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光纤有线电视之讯号量测与障碍分析

光纖有線電視之訊號量測與 光纖有線電視之訊號量測與 障礙分析 障礙分析 Hai-Han Lu 呂海涵( ) hhlu@ntut.edu.tw National Taipei University of Technology Institute of Electro-Optical Engineering Outline Outline CATV HFC system CATV HFC system Measured instrument Measured instrument Technical regulation Technical regulation Measured technique Measured technique Optics Optics Electrics Electrics Monitor system Monitor system Conclusion Conclusion Broadband - CATV CATV means that use lines to transfer programs CATV means that use lines to transfer programs CATV can compensate for insufficient air channels CATV can compensate for insufficient air channels CATV is a kind of local communications CATV is a kind of local communications Fiber brings a lot of benefits in Data Communication Fiber brings a lot of benefits in Data Communication also in CATV systems also in CATV systems Satellite CATV Head End Processing Path Processing Path Program Provider Frequency Distribution Frequency Distribution Down-stream Up-stream Analog broadcast video Digital video 0 100 200 300 400 500 600 700 800 900 Frequency (MHz) Up-stream 10~40 MHz 6 MHz Down-stream …. Analog 50~550 MHz 170 180 190 200

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