SEMINAR on

DTH (DIRECT TO HOME)

Introduction to DTH

DTH stands for DIRECT-TO-HOME television.

The reception of satellite programmers with a

personal dish in an individual home.

DTH does away with the need for the local cable

operator and puts the broadcaster directly in touch

with consumer .

History of DTH in India

1996 : DTH services were first proposed in India

2000: DTH was allowed with new policy

The operators were required to setup earth stations in

INDIA within 12 month for getting license of broadcasting

whose cost was $2.14 million and will be valid for 10 years.

Basic DTH Network Concepts

Transmission Station•The transmission station also known as earth station is used to uplink the contents.•TV channels would be transmitted from the satellite to a small dish antenna mounted on the window or rooftop of the subscriber's home.

Receive Terminal•Receive type solid offset antenna•Interface cables •Set top box

Receiving Terminal Equipments

Antenna•Antenna size considerations•Antenna mounts•Low Noise Blocker•Polarization•Dish material and constructionSet Top Box•Input voltage range: 90-250V AC•Frequency connectors: 50Hz ± 5%

WORKING OF DTH

Satellite

•Geostationary satellites play an important role for DTH systems.•Geostationary satellites are positioned at an exact height above the earth (about 36000 Km).

•The amount of information depends upon the size of bandwidth.•For DTH system communication channel is air and Band-Width is:

Ku Band Uplink: 13.75 to 14.5 GHz

Ku Band Down links: 10.95 to 11.20 GHz

11.45 to 11.70 GHz

12.50 to 12.75 GHz

Communication Channel & Bandwidth

To view pay & free-to-air TV channels of various DTH platform on your home TV.Doordarshan free-to-air services providing 40 TV channels with no subscription fees is an attractive preposition to people in urban and rural areas. These channels comprises of DD channels and popular channels of news, sports, information, entertainment etc.One can scan the entire globe with a motorized dish using a CI set top box with CAM modules and watch TV channels of several DTH platforms visible to the dish terminals.

DTH Application

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The DTH Category is expected to grow by 680% or so in the next 7 or 8 years.

Cost effective communication, information and entertainment to all.Small size terminals can provide up to 4000 TV channels and 2000 radio channels through a click of a button and thus brings world’s latest information, news, and entertainment to your home.DTH services bypasses mediators and thus content provider comes with customer directly.DTH services are transparent providing digital quality video, audio, radio, and IP to all at equal prices and other benefits with reliability.

DTH Benefits

Conclusion

DTH connects urban, rural and remote areas of the country and provides desire information communication, education and entertainment at the click of a button.

Broad band noise will have negligible effect on GMRT. Observations, as the minimum separation distance is 90 meters with the assumption that there is no DTH system in 100 meter circle from any of the GMRT antennas. Care must be taken for arm antennas.

Thank YouPREPARED BY:-

ANUJ PRABHAKAR LAKRA

07BTECE006B.TECH. ECE 3rd YEAR