How Does Satellite Telivision Works?

 How Does Satellite Telivision Works?

How Does Satellite Telivision Works?

  Satellites have revolutionized the way that we humans live.  Towards the end of the post, we will also explain the interesting reason why there is no buffering of your TV broadcast in the way that internet videos are buffered.

 To comprehend satellite TV broadcasting appropriately, we first need to have some essential information about the pieces of a satellite and how a satellite moves.


Satellite At Space

 As you know, the Earth rearound the sun in an elliptical orbit, and the Earth also turns on it's own axis.

 You can see that this axis of rotation is not perpendicular to the elliptical orbit surface but slightly inclined.

 For satellite TV to work, the satellite should not move relative to your house. This implies the satellite ought to turn at a similar speed as that of the  means earth.Which, it will take 24hours to complete one cycle.


Force Balence Equation

 Let's work out the force balance equation of the gravitational and centrifugal forces at this point using this speed information. You can see that the orbital radius required to achieve the no relative motion condition, for the satellite, is exactly 42,164 kilometers.

ASA Geostationary Orbit

 This orbit is known asa geostationary orbit. All satellites used forsatellite TV purposes should be parked in this orbit and this visual shows how crowded the geostationary belt has become nowadays. Now, let's find out a few thingsabout the satellite itself.


How Much Energy Request for Satellite

 The energy required for a satellite mostly comes from it's solar panels. However, if the satellite is not facing the sun, a battery pack helps to continue it's operations.

How Does Satellite Telivision Works?


Engines Of Satellite

 It is interesting to note that satellites have small engines called thrusters. The gravitational field experienced by a satellite is not uniform due to irregularitieson the Earth's surface and the presence of the Moon and the Sun.


Working of Thrusters

 The engine creates a very minute measure of power to keep the direction and positionof the satellite right.

 The most important part of a satellite for communication purposes is the transponder.

Transponders

 The transponder's receives signals from the base station at one frequency, amplifythe power of the signal, remove any noise andtransmit it back to earth at a different frequency.

 The uplink frequency is always higher than the downlink frequency. You can see antennas of different frequency bands.


Which Band is Used in D2H?

 For D2H, the Ku Band frequency you is generally used. These Ku Band Signals have good power, which allows a smallersize receiver antenna.

 Before, C Band signals, which have lower vitality, were utilized for TV interchanges and that is the reason enormous radio wires were utilized in those previous days.However, Ku Band signal's are affected by rain. So, scientist's have hadto overcome this issue with improvements in satellite technology.

 Now that we have some basic information, let's see how hundreds of TV channels reach to your home via the satellite TV technology. 

How All Satellites are Managed?

They have a video creation office and continue delivering content for mass survey, all day, every day. 

This station needs to beavailable simultaneously on many satellite TV telecasters systems. 

To accomplish this, CNN just beams their sign to their leased transponder init's geostationary circle. 

It ought to be noticed that before sending the video flags, the program source inserts advertisements as reasonable focuses and this is the first source of salary for the channel.

CNN Signals

 Now the CNN signal is commonlyav ailable at one point, and any DBS provider can access the signal once they have made a business agreement with the program source. Correspondingly, the DBS provider collects signals from numerous such channels or program sources.

After that, the DBS provider beams the signal to their rented transponder in a satellite. A DBS provider rents manytransponders to handle the huge amount of datathey have to transmit.

 Along these lines around 300-400 channels will be accessible on a solitary DBS supplier satellite.

Presently the last stage in signal transmission the transmission of the signals to the end client. 

Here, the end client has toangle their dish reception apparatus towards the DBS suppliers satellite.

 You might have seen thatfor different DBS providers, there are different angles for the dishes. Even if the dishes areall in the same location.

 This is because the different providers might be using different satellites for transmitting their signals.

How we get Signals on Dish?

 The signals received by your dish are encrypted to prevent piracy, and only a dedicatedcard in the set top box will be able to decrypt it back.

 Do you know that the live events you are watching on your satellite television are actually delayed by a few seconds?

 The signal leaving the broadcast center has to travel a huge distance via two satellites before it reaches you. Even though the signals else at the speed of light, such a huge distance will cause a delay of around 0.5 seconds.

 Moreover, a live broadcaster may also add a specific profanity delay on top of the normal delay. Presently for the intriguing correlation between web recordings and satellite TV. 

Both of the televisionand web innovations send information in a digital format, as zeros and ones. 

Why would that be no buffering on your TV, in the way that you see it on YouTube or Facebook recordings? 

On satellite television,the telecaster offers just 300 to 400 stations or video transfers and the client needs to choose only one from this little assortment.

However, on the internet,the demands of each user are very different. There are millions of videoson the internet to choose from.

 This means that the volume of traffic handled by TV broadcasters is no where close to the level of internet traffic, and it is this huge level of traffic on the internet which made may sometimescause traffic congestion and buffering.

 To understand how satelliteshelp your GPS to work, please check our post in this series. Thank you. 

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