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CATV presentation mungmingmungming

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Ramita Pinsuwannakub

on 14 November 2014

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Transcript of CATV presentation mungmingmungming

ECS456 Optical Communication
Cable Television (CATV)
Group Members:
1. Paponpan Sopajitwattana ID:5422780734
2. Chanya Lueangwattana ID:5422781203
3. Ramita Pinsuwannakub ID:5422781914
4. Natthida Thaweewong ID:5422790683

What is 'CATV' ?
1. Coaxial Cable
2. Hybrid Fiber Cable (HFC)
Types of Cables
HFC = coaxial cable + optical fiber
(Radio Frequency over Glass)
RFoG is the passive optical design network which composed of the fiber optic and coaxial cable as same as HFC but in RFoG, fiber optic as higher ratio than coaxial cable.
- RF
- MATV

History
- What is CATV ?
- Component
+ Only coaxial
+ HFC
CATV
( Optical Fiber +coaxial )
HFC
- What is HFC?
- Component of HFC
- The process

Comparison of
coaxial and HFC
In the future
- RFoG
Conclusion
RFoG
History

CATV
HFC
Comparison
CONCLUSION
Outline
- stands for cable television or community antenna television
What is HFC?
Coponents
of HFC Network?
- the distribution system that supports many services such as broadcast television and high speed internet access.
- utilize single mode and multi-mode signal
DTH
(Direct To Home)
The signal is transmitted by the satellite through Ku spectrum band
Head-end parts
1. Antenna
2. Multiband amplifier
3. Channel converter
4. RF modulator
1
2
3
4
Interconnection parts
1. Trunk Amplifier (TA)
2. Extension Amplifier (EA)
3. Splitter
4. Tap-off
RF
( Radio Frequency )
Copper cable
HFC cable
more expensive
but less maintenance cost
cheaper
higher frequency BW
(up to 750 MHz)
frequency BW upto
350 MHz or 450 MHz
more flexibility, can adapt to
new services without changing existing parameter
lighter weight and thinner
thick
can not be cascaded with no
limitation
skill required for installation
easier to install
"HFC" or "hybrid fibre-coaxial" is a communication medium
Fiber Optic
Coaxial cable
The basic signal that be used on TV in condominium or apartment.
There is the only basic channel such as 3,5,7,9, NBT and Thai PBS.
RF signal get from a large antennas on towers and transmit the signal through the cable
MATV
Master Antenna TV
a technology used to service multiple use facilities with a number of television outlets from one antenna system.
The process is same with CATV but MATV can use in shorter distance around 100m to 200m.
In long distance transmitting, the signal is easy to lose
HFC was first used in a TV transmission
in Australia by
"Telstra" and "Optus" in early 1990's.
Using coaxial cable
One way video broadcast
HFC (Hybrid fibre-coaxial)
Using amplifier cascades
One-way video broadcast topology
CATV using HFC
Original CATV Network
Coaxial
Cable
Fiber Optic
Cable
Using fiber optic at the head end replace Coaxial and amplifier
Simple HFC network
Solve the problem about noise and reliability
- adding the optical RING topography
Advanced HFC Network with
Ring Topography
more reliability, support larger bandwidth, and support two-way operation
Full transcript