7. MEDIA TRANSMISI

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7. MEDIA TRANSMISI
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Medium Transmisi dan Lapisan Fisik
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Klasifikasi media transmisi
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3.1 Media terpandu(guided media)

• Kabel Twisted-Pair (Twisted-Pair Cable)
• Kabel Koaksial (Coaxial Cable)
• Kabel Fiber-Optic (Fiber-Optic Cable)

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Kabel Twisted-pair (Twisted-pair cable)
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UTP dan STP

• UTP (Unshielded Twisted-Pair)
• STP (Shielded Twisted-Pair)

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Kategori untuk Unshielded Twisted-Pair
Kategori Bandwidth Data Rate Digital/Analog Penggunaan
1 very low lt 100 kbps Analog Telephone
2 lt 2 MHz 2 Mbps Analog/digital T-1 lines
3 16 MHz 10 Mbps Digital LANs
4 20 MHz 20 Mbps Digital LANs
5 100 MHz 100 Mbps Digital LANs
6 (draft) 200 MHz 200 Mbps Digital LANs
7 (draft) 600 MHz 600 Mbps Digital LANs
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Konektor UTP
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Perfomans UTP
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Kabel Koaksial (Coaxial cable)
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Kategori kabel Koaksial
Category Impedance Use
RG-59 75 W Cable TV
RG-58 50 W Thin Ethernet
RG-11 50 W Thick Ethernet
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Konektor BNC
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Perfomans Kabel Koaksial
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Karakteristik Pembiasan cahaya/sinar (Bending of
light ray)
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Perambatan Cahaya/Sinarpada Fiber-Optis
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Mode-mode Perambatan cahaya
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Mode-mode Perambatan cahaya
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Tipe-tipe Fiber Optis
Tipe Core Cladding Mode
50/125 50 125 Multimode, graded-index
62.5/125 62.5 125 Multimode, graded-index
100/125 100 125 Multimode, graded-index
7/125 7 125 Single-mode
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Konstruksi Fiber Optis
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Tipe-tipe Konektor Kabel FO
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Perfomans Fiber Optis
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7.2 Media Takterpandu(Unguided Media Wireless)

• Radio Waves
• Microwaves
• Infrared

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Spektrum Gelombang Elektromagnetik untuk
komunikasi NirKabel (Electromagnetic spectrum
for wireless communication)
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Metode-metode Perambatan Gelombang (Propagation
methods)
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Pembagian band
Band Range Propagation Application
VLF 330 KHz Ground Long-range radio navigation
LF 30300 KHz Ground Radio beacons andnavigational locators
MF 300 KHz3 MHz Sky AM radio
HF 330 MHz Sky Citizens band (CB),ship/aircraft communication
VHF 30300 MHz Sky andline-of-sight VHF TV, FM radio
UHF 300 MHz3 GHz Line-of-sight UHF TV, cellular phones, paging, satellite
SHF 330 GHz Line-of-sight Satellite communication
EHF 30300 GHz Line-of-sight Long-range radio navigation
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Gelombang Transmisi Nir Kabel (Wireless
transmission waves)
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Antena Omnidirectional (Omnidirectional antennas)
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Antena Unidirectional (Unidirectional antennas)

• Gelombang Radio digunakan untuk komunikasi
  multicast , seperti radio dan televisi, dan
  sistem paging.

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Gelombang Mikro dan Sinyal Inframerah

• Gelombang Mikro (Microwaves) digunakan untuk
  komunikasi unicast, seperti telefon selular
  (cellular telephones), jaringan satelit, dan
  wireless LAN.
• Sinyal inframerah (Infrared signals) dapat
  digunakan untuk komunikasi jarak pendek dengan
  metode perambatan segaris-pandang (line-of-sight).