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The Satellite Television

System

In earlier times, a few individuals that had expensive dishes used them to discover new programs which weren’t intended for the general public. Foreign stations and NASA activities were among many things you could see using satellite dishes. Nowadays, this technology is accessible to everyone. Some people still get this kind of programming, however the majority of people use the service of a DBS also known as direct broadcast satellite, like DirecTV or Comcast. These providers gather many TV stations and deliver them to customers in packages. The number of TV stations in a package is determined by the competition in the market. The main competitor of DBS providers is cable TV. The provider's broadcast nowadays is entirely digital, meaning it is likely to have a better sound as well as picture quality. A DLP TV utilizes a digital micro mirror device also known as a DMD chip that’s composed of over 1M pixels. LCD displays are created from 3 polarized glass panels, the first one being red, the second blue and the last one green. Liquid crystallized molecules run between these panels. The DLP television is better in case you wish to enjoy high-speed scenes such as sports & action movies. LCD television offers better colors however the person is required to look straight-on at the TV screen. Early satellite TV used radio signals within the 3.7Ghz - 6.4GHz range called the C-band radio. Now DBS is able to transmit programming in Ku frequency mode (i.e.,11.7 and 14.5 GHz). The elements The principal components that are included in a DTH satellite system comprise: the broadcast center, the source of programming, the satellite, the dish & finally the receiver. Programming sources can be basically TV stations such as HBO and Fox. They pay the providers for broadcasting their content thru satellite. Now, there are 2 primary satellite TV providers of subscription based service in the US: DISH Network & the DirecTV. Thus, a provider is similar to a middleman among the consumer & the programming companies. Cable services work on an identical principle. A broadcasting center is where a provider gets the signal from sources & emits those signals to orbiting satellites around the Earth. These signals are then re-emitted to earth by the satellites. The satellite accepts the signal from a broadcast center and sends them back to earth, where satellite dishes receive these signals. Satellite signals are pretty “big” because they contain high-quality data. So it's hard to send them without compression. Compression is a process in which unnecessary repetitive data is cut out before transmission. The signal is put back together after it’s sent to the receiver in the customer's house. The role of the customer's dish is to pick up TV signals from satellites and pass those signals to the receiver. The signal is then processed and passed onto the Television screen. Back in the day, people who could use satellite dishes used to catch wild syndicated program feeds at no cost. But these signal had to be hunted down – they hardly get previewed similar to the modern broadcast programs. Such signals are available even today.
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