tema _2 grupo unilagoINGLES

8/9/2019 tema _2 grupo unilagoINGLES

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ITEM 2:Media wireless communications for

radio and television

group: Unilago

KATHERINE MARTNEZ PAREERIKA BEDOYA FIGUEROJESSICA AVENDAO


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CONTENTS1. What is broadcasting2. Physical media broadcasting3. Ranges of frequencies used in radio. Explain HF (high frequency) or VHF (Very High

Frequency), UHF (Ultra High Frequency) or SHF (Super High Frequency)4. Explain AM and FM

5. Frequency ranges used in creosote TV6. Ways that the signal can reach the audience7. CATV8. Frequency ranges used in TV cable9. What are Colombia cable television providers10. Difference between baseband and broadband

11. What is cable modem and how it works (images)12. Diagram a modem cable to a home network connection. Indicate usedconnectors and cables .

13. Televisin satelital14. Cables used for TV and radio


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WHAT IS BROADCASTING

It is the transmission of signalsthrough the modulation of electromagnetic waves.As a means of communication,requires a specific transmission form


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Physical mediabroadcasting


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Ranges of frequencies used in radio.


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VHF

Frecuencia muy alta (VHF)

Ciclos por segundo: 30 MHz a 300 MHzLongitud de onda: 10 m a 1 m

VHF is commonly used for transmission of FM radio and television broadcasts.Also it is generally used for terrestrial navigation and radio amadorismosystems.


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SHF

The sper-alta frequency (SHF) is a band radiofrequency (RF) band in the range 3-30 GHz SHFand EHF are known as microwave bands andtheir wavelengths are short enough to bereproduced by directional antennas signup andwave guides.


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AM y FM

A m: moderate extent F M: moderate frequency


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the difference between the modulated amplitude and frequencymodulation.


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Frequency radiated

television

Satellite TV is a method to makebounce in a communicationssatellite signal emitted from apoint on the Earth, so that it canreach other parts of the planet TV

television transmission


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Ways that the signal canreach the audience


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CATV


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D EF INICION D E CATV

CATV (Community A ntenna Television - cable

television) ). Service which offers television tosubscribing homes image transfer leverages TVnetworks by fiber-optic or coaxial cable into adigital or analog line.


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The main elements of a CATV network: header

A CATV NETWORK A R CH ITECTUR E


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Terminal network header

Center of distribution is theoptical signalbecomes again inelectric and splits toapply to distributors


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Frequently in television cable

is a system of television services provided to consumersthrough signal RF transmitting to fixed TVs on the optical orcoaxial cables .


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M A IN SUPPLIER S OF TELEV ISION PER CAB LE


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Difference betweenbaseband and broadband

.

.

banda ancha


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CABLE MODEM AND HOWIT WORKS

A cable modem is aspecial type of modemdesigned for modulardata on infrastructure T V signal cable


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D IAG R A M A NETWORK B ETWEEN D OMESTIC A ND

CAB LE MOD EM


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Satellite TV


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Terrestrial digital TV(TD T)


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TH E AD VA NTAG ES OF TH E(TD T)


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Cables used for TV and radio

Coaxial cable R G -59.Protective roofing A :

plastic B : C: isolator D : corecopper copper mesh

The fibre can be used as a sensor to measurevoltages, temperature pressure as well asother parameters .


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OPTICAL FIBER

They are also used forlocal networks. Opticalfiber consists of a coreof fiber glass or plastic,A deck and a protective

layer .

T ube Holgado isolates external mechanical forcesengaged on cable fiber .

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tema _2 grupo unilagoINGLES