dth presentation

67 %
33 %
Information about dth presentation

Published on April 20, 2010

Author: bhavinpatel13

Source: authorstream.com

Presentation on DTH : Presentation on DTH By: bhavin patel Index : Index What is frequency & frequency spectrum? What is audio signal? What is video signal? What is DTH (direct-to-home)? Block diagram of DTH. What are the equipment used in DTH? What is the function of each unit? What is the frequency? : What is the frequency? Frequency : The number of times per second an electromagnetic wave completes one cycle Hertz : The measurement of frequency Frequencies are measured in Hertz 10 Hz = 10 cycles per second1 kHz = 1000 cycles per second 1 MHz= 1,000,000 cycles per second 1 GHz = 1,000,000,000 cycles per second Slide 4: Analog Signal A continuous electromagnetic wave which may vary in amplitude or frequency Digital Signal A signal that is expressed by discrete states, usually 0 and 1 1 sec 1 sec 8-bit Sample Value = 10110101 Signal Types Slide 5: 1 Hz 1,000 Hz(1 kHz) 1,000 kHz(1 MHz) 1,000 MHz(1 GHz) 1,000 GHz(1 THz) HouseholdElectricity AMRadio TV ChannelsFM Radio Microwave Light Signal Fundamentals - Electromagnetic Spectrum Slide 8: Frequency Spectrum CATV for PAL B/G Slide 9: Frequency Spectrum CATV What is audio signal? : What is audio signal? Two types of audio signals: 1. analogue audio 2. digital audio Analog Audio : Microphone works by converting the pressure waves of sound into changes in voltage on a wire and changes in voltage match the pressure waves.  Speaker works like microphone in reverse that it is convert the electric signal into sound wave. Analog Audio Digital Audio : Digital Audio  Sampling rate limits the frequency range of the audio file and must be at least twice the frequency  The higher sampling rate will be to that of the original analog waveform What is video signal? : What is video signal? Video signal can contain the information of the picture, each pixels can contain the important information. Types of video formats : Types of video formats Composite Video Signal S Video RGB Signal Component Video Signal Slide 15: What is DTH? DTH stands for Direct-To-Home television. It is the reception of satellite programmes with a personal dish by viewers for a single connection or for multiple connections in the same premises DTH is the direct mode of transmission between ‘Broadcaster’ and ‘Viewer’. General block diagram of DTH : General block diagram of DTH Slide 17: Tunner : It is select particular channel in the rang from 48 MHz to 860 MHz Demodulator: Selected Channel demodulate and the signal fed to decoder. Decoder: It is the D to A converter. Out put of decoder is audio & video signal. Microcontroller: It is control the all the process perform by each block. Slide 18: Components of DTH Minidish antenna : Minidish antenna It is the parabolic reflector, it is receive the signal from the satellite and fed to LNBF. Low noise block down converter (LNBF) : Low noise block down converter (LNBF) It is receive the signal of ku-band and down convert into RF signal. collects signal from the minidish It amplifies the signal It switches between vertical & horizontal polarities It down converts the incoming frequencies Co-axial Cable : Co-axial Cable Co-axial cable provide the link between the dish and stb. A transmission cable consisting of an outer metal conductor enclosing and insulated from a central conducting core. Connector : Connector Connector is used to connect the LNBF and STB with the cable. Set-top-box (STB) : Set-top-box (STB) Set-top-box can demodulate the signal and than converted into audio and video signal. And it is given to television. Thank you : Thank you

Add a comment

Related presentations

Related pages


DTH-kalender 2016. Die besten Bilder von der diesjährigen Konzertsaison: Insgesamt 14 Mal die Hosen inklusive Cover und Back-Cover, ein hochwertiger ...
Read more

power point presentation on Direct to home (DTH) - Scribd

power point presentation on Direct to home (DTH) - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation ...
Read more

DTH Presentation - pt.scribd.com

Scribd is the world's largest social reading and publishing site.
Read more

PowerPoint Präsentation DTH - Toten Hosen - Die Toten ...

Hallo. Ich mache zur Zeit eine PowerPoint Präsentation über die Toten Hosen und bräuchte noch irgendein gutes DTH Zitat als Einleitung. Entweder ...
Read more

24 TATA SKY DTH PowerPoint PPTs on PowerShow.com

View Tata Sky Dth presentations online, safely and virus-free! Many are downloadable. Learn new and interesting things. Get ideas for your own presentations.
Read more

DTH PPT(Powerpoint) Presentation DTH in India DTH Services ...

DTH PPT(Powerpoint) Presentation DTH in India DTH Services ... Current Rating : Rate It : 13990. Views
Read more

dth by VK BO on Prezi

Invited audience members will follow you as you navigate and present; People invited to a presentation do not need a Prezi account; This link expires 10 ...
Read more

DTH Services Provider, Digital TV, HD Set Top Box in India ...

Now enjoy world-class DTH, Direct to Home services with DishTV. DishTV offers digital TV services, Satellite TV with HD Set Top Box & HD Cannels in India.
Read more