Page 189 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

MODULE 12 : DTH system

LESSON 108 - 117 : DTH system

Objectives

At the end of this lesson you shall be able to:
• state the working principle of DTH
• state the advantages & disadvantages of DTH system.

DTH system

Satellite communication is transporting information from one place to another using a communication satellite
in orbit around the Earth. Watching the English Premier League every weekend with your friends would have
been impossible without this. A communication satellite is an artificial satellite that transmits the signal via a
transponder by creating a channel between the transmitter and the receiver at different Earth locations.
Telephone, radio, television, internet, and military applications use satellite communications. Believe it or not,
more than 2000 artificial satellites are hurtling around in space above your heads.

Satellite Communication Block Diagram

Advantages of Satellite Communication
• The following are the advantages of satellite communication:
• Installments of circuits are easy.
• The elasticity of these circuits is excellent.

• With the help of satellite communication, every corner of the earth can be covered.
• The user fully controls the network.
Disadvantages of Satellite Communication
• The following are the disadvantages of satellite communication:
• Initial expenditure is expensive.
• There are chances of blockage of frequencies.
• Propagation and interference.
Applications of Satellite Communication

• Telephone
• Television
• Digital cinema
• Radio broadcasting

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