sistem jaringan dan komunikasi data
DESCRIPTION
Sistem Jaringan dan Komunikasi Data. #3. Overview. guided - wire / optical fibre unguided - wireless characteristics and quality determined by medium and signal in unguided media - bandwidth produced by the antenna is more important in guided media - medium is more important - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/1.jpg)
Sistem Jaringan dan Komunikasi Data#3
![Page 2: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/2.jpg)
Overview guided - wire / optical fibre unguided - wireless characteristics and quality determined
by medium and signal in unguided media - bandwidth produced
by the antenna is more important in guided media - medium is more
important key concerns are data rate and distance
![Page 3: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/3.jpg)
Design Factors bandwidth
higher bandwidth gives higher data rate transmission impairments
eg. attenuation interference number of receivers in guided media
more receivers introduces more attenuation
![Page 4: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/4.jpg)
Electromagnetic Spectrum
![Page 5: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/5.jpg)
Guided Media Twisted Pair Coaxial cable Optical Fiber
![Page 6: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/6.jpg)
Twisted Pair
![Page 7: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/7.jpg)
Twisted Pair - Transmission Characteristics analog
needs amplifiers every 5km to 6km digital
can use either analog or digital signals needs a repeater every 2-3km
limited distance limited bandwidth (1MHz) limited data rate (100Mbps) susceptible to interference and noise
![Page 8: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/8.jpg)
Unshielded vs Shielded TP unshielded Twisted Pair (UTP)
ordinary telephone wire cheapest easiest to install suffers from external EM interference
shielded Twisted Pair (STP) metal braid or sheathing that reduces interference more expensive harder to handle (thick, heavy)
in a variety of categories - see EIA-568
![Page 9: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/9.jpg)
UTP CategoriesCategory 3
Class CCategory 5
Class DCategory 5E Category 6
Class ECategory 7
Class F
Bandwidth 16 MHz 100 MHz 100 MHz 200 MHz 600 MHz
Cable Type UTP UTP/FTP UTP/FTP UTP/FTP SSTP
Link Cost(Cat 5 =1)
0.7 1 1.2 1.5 2.2
![Page 10: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/10.jpg)
Coaxial Cable
![Page 11: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/11.jpg)
Coaxial Cable - Transmission Characteristics
superior frequency characteristics to TP performance limited by attenuation & noise analog signals
amplifiers every few km closer if higher frequency up to 500MHz
digital signals repeater every 1km closer for higher data rates
![Page 12: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/12.jpg)
Optical Fiber
![Page 13: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/13.jpg)
Optical Fiber - Benefits greater capacity
data rates of hundreds of Gbps smaller size & weight lower attenuation electromagnetic isolation greater repeater spacing
10s of km at least
![Page 14: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/14.jpg)
Optical Fiber Transmission Modes
![Page 15: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/15.jpg)
Wireless Transmission Frequencies 2GHz to 40GHz
microwave highly directional point to point satellite
30MHz to 1GHz omnidirectional broadcast radio
3 x 1011 to 2 x 1014
infrared local
![Page 16: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/16.jpg)
Antennas electrical conductor used to radiate or collect
electromagnetic energy transmission antenna
radio frequency energy from transmitter converted to electromagnetic energy by antenna radiated into surrounding environment
reception antenna electromagnetic energy impinging on antenna converted to radio frequency electrical energy fed to receiver
same antenna is often used for both purposes
![Page 17: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/17.jpg)
Radiation Pattern power radiated in all directions not same performance in all directions
as seen in a radiation pattern diagram an isotropic antenna is a (theoretical)
point in space radiates in all directions equally with a spherical radiation pattern
![Page 18: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/18.jpg)
Antenna Gain measure of directionality of antenna power output in particular direction
verses that produced by an isotropic antenna
measured in decibels (dB) results in loss in power in another
direction effective area relates to size and shape
related to gain
![Page 19: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/19.jpg)
Terrestrial Microwaveused for long haul telecommunicationsand short point-to-point linksrequires fewer repeaters but line of sightuse a parabolic dish to focus a narrow beam
onto a receiver antenna1-40GHz frequencieshigher frequencies give higher data ratesmain source of loss is attenuation
distance, rainfallalso interference
![Page 20: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/20.jpg)
Satellite Microwave satellite is relay station receives on one frequency, amplifies or repeats
signal and transmits on another frequency eg. uplink 5.925-6.425 GHz & downlink 3.7-4.2 GHz
typically requires geo-stationary orbit height of 35,784km spaced at least 3-4° apart
typical uses television long distance telephone private business networks global positioning
![Page 21: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/21.jpg)
Satellite Point to Point Link
![Page 22: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/22.jpg)
Satellite Broadcast Link
![Page 23: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/23.jpg)
Broadcast Radio radio is 3kHz to 300GHz use broadcast radio, 30MHz - 1GHz, for:
FM radio UHF and VHF television
is omnidirectional still need line of sight suffers from multipath interference
reflections from land, water, other objects
![Page 24: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/24.jpg)
Infrared modulate noncoherent infrared light end line of sight (or reflection) are blocked by walls no licenses required typical uses
TV remote control IRD port
![Page 25: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/25.jpg)
Wireless PropagationGround Wave
![Page 26: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/26.jpg)
Wireless PropagationSky Wave
![Page 27: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/27.jpg)
Wireless PropagationLine of Sight
![Page 28: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/28.jpg)
Line of Sight Transmission Free space loss
loss of signal with distance Atmospheric Absorption
from water vapour and oxygen absorption Multipath
multiple interfering signals from reflections
Refraction bending signal away from receiver
![Page 29: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/29.jpg)
Multipath Interference
![Page 30: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/30.jpg)
Data Com Components Message Transmitter Receiver Medium Protocol
![Page 31: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/31.jpg)
A Communications Model
![Page 32: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/32.jpg)
Communications TasksTransmission system utilization Addressing
Interfacing Routing
Signal generation Recovery
Synchronization Message formatting
Exchange management Security
Error detection and correction Network management
Flow control
![Page 33: Sistem Jaringan dan Komunikasi Data](https://reader036.vdocument.in/reader036/viewer/2022062410/5681627b550346895dd2eaf6/html5/thumbnails/33.jpg)
Data Communications Model