This document discusses direct-to-home (DTH) technology. It describes DTH as involving a broadcasting center, uplink antenna, satellite transponder, mini-dish antenna, and DTH receiver. The main components of a DTH network are the uplink antenna, satellite transponder, mini-dish antenna, and low noise block down converter. A set-top box is then used to demodulate and decode the signal into viewable audio and video. Some advantages of DTH are its cost effectiveness, reliability, and ability to provide thousands of TV and radio channels.

1. DTH TECHNOLOGY
PRESENTED
BY
P.SUDHAKAR
11rk1ao447
ECE

2. 2
CONTENTS
 Introduction
 History of DTH
 Main Components
 DTH Network
 lNBC
 Block diagram
 Settop box
 Advantages
 disadvantages
 Applications
 Conclusion
 References

3. WHAT IS DTH

4. DTH CAN BE DEFINED AS

5. HISTORY

6. MAIN PARAMETERS OF DTH
 BROAD COASTING CENTER
 UP LINK ANTENNA
 SATILLITE TRANPONDER
 MINIDISH ANTENNA
 DTH RECEIVER

7. DTH NETWORK

8. Up link antenna
 Up link satellite dishes are large in size, which
provides accurate aiming and increase signal
strength.
 They are pointed toward specific satellite and the
specific frequency is used.

9. Satellite transponder
 A typically satellite can have 32 transponder for
Ku band, 24 transponder for C band
Ku band range :10 to 18 GHZ
C band range :4 to 8 GHZ
 The satellite retransmitts the signal back to earth in
Ku & C band frequency

10. MINIDISH ANTENNA
 It is a parabolic reflector it receives the signal
and fed to the LNBC
 Which works a receiver for signal transmitted by
satellite
Parabolic reflector
(60 t0 120 cm)
LNBC

11. SIGNAL RECEIVED BY MINIDISH

12. DTH RECEIVING

13. LOW NOISE BLOCK DOWN
CONVERTER(LNBC)
 It collect the signal from minidish
 It receive the signal from ku band and convert radio
frequency signal

14. BLOCK DIAGRAM OF DTH SYSTEM
Low noise
amplifier
Down
Converter
Amplifier
Down
Converter
Tunable
Local
Oscillator
Filter
Demodu
lator
TV SET
Video
baseband
Channel selector
Low noise block
down converter

15. SET TOP BOX
 A set top box can be demodulate the received signal.
 It can convert these signal into audio & video signal.

16. SET TOP BOX Block diagram
TUNER DEMODULATOR DECODER AMPLIFIER
MICROCONTROLLER
DISH
ANTENNA
CAS SYSTEM
A
V

17. FUTURE PROSPECT OF DTH
 The DTH market in INDIA is relatively increasing day
by day and in next 5 years(by 2020) we will be add
another 40 million subscriber.
 In the next 5 years.. We have manage to overtake
JAPAN as the largest DTH market in ASIA.

18. ADVANTAGES
 Cost effective communication
 DTH services provides pure quality of video,audi0.
 Easily design
 Reliability
 It can provide up to 4000 TV channels and 2000 radio
channels
 DTH is more resistive to the weather condition ,IF it
can work any type of environment

19. DISADVANTAGES
 Packet and pricing
 The service is interrupted in case at the direction dish
is distributed.

20. DTH SERVICE PROVIDER

21. CONCLUSION