Transmission Media Electromagnetic Spectrum Twisted Pair Cable ...
Transmission Media Electromagnetic Spectrum Twisted Pair Cable ...
Transmission Media Electromagnetic Spectrum Twisted Pair Cable ...
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<strong>Electromagnetic</strong> <strong>Spectrum</strong><strong>Transmission</strong> <strong>Media</strong>Visible light430-750 THzดร. อนันต ผลเพิ่มAnan Phonphoem, Ph.D.anan@cpe.ku.ac.thhttp://www.cpe.ku.ac.th/~ananComputer Engineering DepartmentKasetsart University, Bangkok, ThailandPower,VoiceRadio communicationRadio, microwave, satelliteInfraredLight0 3000 Hz 300 GHzUltra-VioletLightX, gamma,Cosmic rays12<strong>Transmission</strong><strong>Media</strong><strong>Twisted</strong> <strong>Pair</strong> <strong>Cable</strong>Guided <strong>Media</strong>Unguided <strong>Media</strong>100 Hz 5 MHz<strong>Twisted</strong>-<strong>Pair</strong><strong>Cable</strong>Coaxial<strong>Cable</strong>Fiber-Optic<strong>Cable</strong>Radio Microwave SatelliteOuter Insulator(PVC)Solid CopperConductors4Effect of Noise on Parallel LinesNoise SourceNoise on <strong>Twisted</strong>-<strong>Pair</strong> LinesNoise SourceSenderNoise Effect = 10 unitsNoise Effect = 7 unitsReceiver107Total Effect= 10-7= 3Sender5 5 5 5Receiver3 3 3 316Total Effect= 16-16= 016561
Unshielded <strong>Twisted</strong> <strong>Pair</strong> <strong>Cable</strong>Shielded <strong>Twisted</strong>-<strong>Pair</strong> <strong>Cable</strong>Plastic Cover<strong>Twisted</strong> pairs(5 pairs)Plastic CoverMetal ShieldInsulationCopper78Coaxial <strong>Cable</strong>Fiber <strong>Cable</strong>100 KHz 500 MHzInsulatorOuter JacketBufferPlastic CoverOuter Conductor(Shield)Inner ConductorFiber(Core and Cladding)910Fiber-Optic<strong>Cable</strong>RefractionMultimodeSingle-ModeStep-IndexGraded-IndexFrom less dense tomore dense mediumFrom more dense toless dense medium122
Critical AngleReflection1314Multimode Step-IndexMultimode Graded-Index1516Single Mode173
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