ACTIVE LEARNING ASSIGHMENT ON

DTH (DIRECT TO HOME)

FACULTY:

PRESENTED BY:

BHARGAV DESAI

PRUTHVI GABANI

PARTH CHOVATIYA

BATCH: A2

DEPARTMENT: CE

GANDHUNAGAR INSTITUTE OF TECHNOLOGY

DIRECT TO HOME

(DTH)

TECHNOLOGY

Presented By :-

Bhargav desai

Pruthvi gabani

Parth chovatiya

What we will cover !!!

• Introduction

• Components

• Working Broad casting centre

Receiving dish (working)

Set up box

• Benefits and Limitations

• Features

• Conclusion

INTRODUCTION

DTH stands for Direct-To-Home

The Direct-To-Home (DTH) service is a digital satellite

service that provides television services direct to subscriber.

The installation of a DTH Television consists of :

• A Dish Antenna (60 to 90 cm) in diameter

• A Conventional TV set

• Set top box

• Coaxial Cable between dish and set top box

• Programming Sources are simply the

channel that provides programming for broadcasting.

• Broadcasting Centre is the central hub of the system which transmit the programming channel in wave form

•Satellites which the signals from broadcast station and re- broadcast to them on the earth

•Dish picks up the signal from the satellite and passes it on to the receivers in the viewers house

•Receiver processes the signal and passes it to the standard television

Components For DTH

• First the broad casting centre send the data(programming channel) to the Earth station then change digital data into wave form .

• Then this wave form is transmitted by the earth station to the geostationary satellite in the space .

• Then after the satellite transmit this wave signal back to the earth in a wide range.

• Then a disk with LNB receives the signals and from the satellite and again transmit it to the set up box .

• Setup box convert wave signal in to digital form again and then it gives to the standard television

WORKING OF DTH

Network of DTH

Broadcasting Centre

Data ProgrammingSource

Different Channels

Earth station

Then transmittedTo the geostationary satellite

RECEIVER DISH

The dish at home is simply made of reflecting

material and it is a shape of concave mirror.

At the end of the dish there is a round cylinder shape object called LNB (low noise block down converter which receive wave form and it converts the 12.2 to 12.7 GHz band to 950 to 1450 MHz .

At end of an arm and faces the parabolic reflector(dish) which focuses the signals from a satellite into the feed horn of the LNB.

Low Noise Block-down Converter

(LNB)

The central element in the feed horn is low noise block-down converter.

Block-down convertor (so called because it converts a whole band or ‘block

of frequencies’ to a lower band) i.e. it converts the 12.2 to 12.7 GHz band to

950 to 1450 MHz

An LNB sits on the end of an arm and faces the parabolic reflector(dish)

which focuses the signals from a satellite into the feed horn of the LNB.

SET UP BOX

After the receiving of wave form by LNB of the dish it is pass over to the Set up box

which convert wave signal into digital signal and pass it to the standard television set by a cable

This way television program can be seen on our tv.

Limitations of DTH Technology

• Under unfavourable climatic conditions the service remains

unavailable.

• The service is interrupted in case if the direction of dish is

disturbed.

• Transmission gets interrupted due to sun outage.

Features of DTH Television

Some of the features of DTH service are as following:

• DTH offers better quality picture than Cable TV.

• DTH can reach remote areas where terrestrial transmission and cable TV

have failed to reach.

• DTH also allows for interactive TV services such as movie-on-demand,

and e-mail.

• In DTH, the payments will be made directly by the subscriber to the

satellite company offering the service.

Conclusion

Direct To Home Technology connects urban , rural and

remote areas of the country and provide desire information,

communication, education and entertainment at the click of

button.

Presentation prepared by BHARGAV DESAIPRUTHVI GABANIPARTH CHOVATIYA

CLASS –CE A/A2SEM 1 SUB - EC LAB