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TIK-3: 
Data, Komunikasi Data
Komunikasi Data 
● Data = ... ? 
● Komponen Komunikasi Data 
● Tipe Transmisi Data 
● Kecepatan & Kapasitas Kanal Transmisi 
● Media Transmisi Data 
● Protokol Transmisi Data 
● Mode Transmisi Data 
● Modulasi Data
Data = ... ? 
● Data adalah.... 
● Data adalah kumpulan fakta 
● Data adalah sesuatu yang belum mempunyai arti 
bagi penerimanya dan masih memerlukan adanya 
suatu pengolahan 
● Data adalah representasi atau hasil rekaman atas 
kejadian, fakta, atau fenomena yang terjadi dalam 
dunia nyata. 
● Data --> Sinyal --> Informasi
Data: Analog Vs Digital 
● Data dikirim berupa signal elektromagnetik 
● Sinyal Analog = Smooth & Continue
Sinyal Digital 
● Sinyal digital = finite & discrete
Sampling & Kuantisasi
Komunikasi Data
Komponen Komunikasi Data 
● Sender : The Sender is the device that sends the data message. It can be a computer, workstation, 
telephone handset, video camera and so on. 
● Receiver : The Receiver is the device that receives the data message. It can be a computer, workstation, 
telephone handset, video camera and so on. 
● Medium : The transmission medium is the physical path by which a message travels from sender to 
receiver. It can consists of twisted pair wire, coaxial cable, FOC, laser or radio waves. 
● Message : The Message is the information to be communicated. It is a combination of text,graphics, image, 
audio and video. 
● Protocol : A protocol is a set of rules that govern data communication. It represents an aggrement between 
the communicating devices. Without a protocol, two devices may be connected but not communicating, just 
as a person speaking in Tamil cannot be understood bya person who speaks only English.
Representasi Data 
● Teks; dikodekan dalam bit (ASCII dan Unicode/UTF) 
● Angka; tidak direpresentasikan dengan ASCII untuk 
menyederhanakan proses 
● Image; dikodekan dalam bit, kumpulan dari matrix 
pixel ( (picture element) 
● Audio (suara atau musik); disampling, dikuantisasi, 
dikodekan secara biner. 
● Video (gambar atau film); identik dengan audio
Demo : Matlab 
● Membaca data gambar --> imread 
● Membaca data suara --> wavread
Tipe Transmisi Data 
● Simplex : Transmisi satu arah: 
Misal: Radio, Televisi 
● Half Duplex : Transmisi dua arah bergantian 
Misal: HT/Walkie talkie 
● Full Duplex 
Misal : Telepon, Voice chat
Media Transmisi (Wired) 
● Twisted pair --> kabel pasangan terpilin 
Unshielded & Shielded 
Contoh: Kabel telepon 
● Kabel Koaxial 
Contoh: Kabel TV 
● Serat Optik 
Contoh : Kabel telefon & Internet
Twisted Pair
Coaxial
Fiber Optic 
1. Core 
2. Cladding 
3. Buffer 
4. Jacket
Wireless 
● Radio wave 
● Infrared 
● Bluetooth 
● Wifi 802.11 b/g/n --> ... GHz 
● Wimax ?? 
3 Khz – 300 GHz 
300 Ghz – 430 GHZ
Kecepatan & Kanal 
● Kecepatan transmisi = baud / bps 
● Kecepatan transmisi bergantung pada kanal 
Jenis Channel Kapasitas Biaya Total Tingkat Kesalahan 
Narrow band 50 – 300 bps Rendah Tinggi 
Voice band 300 – 500 bps Sedang Sedang 
Broad/wide bad s/d 1 jt bps Tinggi Rendah
Protokol Komunikasi 
● TCP/IP (Transfer Control Protocol / Internet Protocol), 
merupakan protokol yang 
Digunakan di internet. Dalam TCP/IP tersedia juga 
beberapa jasa, seperti HTTP (hypertext transfer 
protocol), FTP (file transfer protocol), e-mail, telnet 
(remote login), dll. 
● SPX/IPX, digunakan pada LAN sistem operasi jaringan 
Novel Netware 
● X25, biasa digunakan oleh jaringan perbankan (cabang 
online, ATM, dll).

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Tik 3

  • 2. Komunikasi Data ● Data = ... ? ● Komponen Komunikasi Data ● Tipe Transmisi Data ● Kecepatan & Kapasitas Kanal Transmisi ● Media Transmisi Data ● Protokol Transmisi Data ● Mode Transmisi Data ● Modulasi Data
  • 3. Data = ... ? ● Data adalah.... ● Data adalah kumpulan fakta ● Data adalah sesuatu yang belum mempunyai arti bagi penerimanya dan masih memerlukan adanya suatu pengolahan ● Data adalah representasi atau hasil rekaman atas kejadian, fakta, atau fenomena yang terjadi dalam dunia nyata. ● Data --> Sinyal --> Informasi
  • 4. Data: Analog Vs Digital ● Data dikirim berupa signal elektromagnetik ● Sinyal Analog = Smooth & Continue
  • 5. Sinyal Digital ● Sinyal digital = finite & discrete
  • 8. Komponen Komunikasi Data ● Sender : The Sender is the device that sends the data message. It can be a computer, workstation, telephone handset, video camera and so on. ● Receiver : The Receiver is the device that receives the data message. It can be a computer, workstation, telephone handset, video camera and so on. ● Medium : The transmission medium is the physical path by which a message travels from sender to receiver. It can consists of twisted pair wire, coaxial cable, FOC, laser or radio waves. ● Message : The Message is the information to be communicated. It is a combination of text,graphics, image, audio and video. ● Protocol : A protocol is a set of rules that govern data communication. It represents an aggrement between the communicating devices. Without a protocol, two devices may be connected but not communicating, just as a person speaking in Tamil cannot be understood bya person who speaks only English.
  • 9. Representasi Data ● Teks; dikodekan dalam bit (ASCII dan Unicode/UTF) ● Angka; tidak direpresentasikan dengan ASCII untuk menyederhanakan proses ● Image; dikodekan dalam bit, kumpulan dari matrix pixel ( (picture element) ● Audio (suara atau musik); disampling, dikuantisasi, dikodekan secara biner. ● Video (gambar atau film); identik dengan audio
  • 10. Demo : Matlab ● Membaca data gambar --> imread ● Membaca data suara --> wavread
  • 11. Tipe Transmisi Data ● Simplex : Transmisi satu arah: Misal: Radio, Televisi ● Half Duplex : Transmisi dua arah bergantian Misal: HT/Walkie talkie ● Full Duplex Misal : Telepon, Voice chat
  • 12. Media Transmisi (Wired) ● Twisted pair --> kabel pasangan terpilin Unshielded & Shielded Contoh: Kabel telepon ● Kabel Koaxial Contoh: Kabel TV ● Serat Optik Contoh : Kabel telefon & Internet
  • 15. Fiber Optic 1. Core 2. Cladding 3. Buffer 4. Jacket
  • 16. Wireless ● Radio wave ● Infrared ● Bluetooth ● Wifi 802.11 b/g/n --> ... GHz ● Wimax ?? 3 Khz – 300 GHz 300 Ghz – 430 GHZ
  • 17. Kecepatan & Kanal ● Kecepatan transmisi = baud / bps ● Kecepatan transmisi bergantung pada kanal Jenis Channel Kapasitas Biaya Total Tingkat Kesalahan Narrow band 50 – 300 bps Rendah Tinggi Voice band 300 – 500 bps Sedang Sedang Broad/wide bad s/d 1 jt bps Tinggi Rendah
  • 18. Protokol Komunikasi ● TCP/IP (Transfer Control Protocol / Internet Protocol), merupakan protokol yang Digunakan di internet. Dalam TCP/IP tersedia juga beberapa jasa, seperti HTTP (hypertext transfer protocol), FTP (file transfer protocol), e-mail, telnet (remote login), dll. ● SPX/IPX, digunakan pada LAN sistem operasi jaringan Novel Netware ● X25, biasa digunakan oleh jaringan perbankan (cabang online, ATM, dll).