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Unfortunately, radio waves can only travel so far when
emitted from an antenna and are subject to distortion as
objects get in between the two points of communication.
Enter the Satellite
A
satellite is actually any object that orbits a larger
object, such as the Earth. Our Moon is considered a
satellite and, in theory, the Earth would be a satellite
to the Sun. Man-made satellites follow this same
premise. A man-made satellite is placed into position
just over 20,000 miles above the Earth. It is programmed
to orbit the Earth so that the satellite stays in sync
with the Earth’s rotation. This means that a satellite
that is positioned over the United States will stay over
the United States, despite the Earth’s constant
movement.
These man-made satellites are electronic boxes that
contain a communication system, a power source and a
navigational system. Many satellites use rechargeable
batteries as their power source, feeding off the Sun’s
natural energy source via large solar panels. The
communication system is designed to relay information
back and forth through those same radio waves that the
traditional broadcasting system uses but at 20,000 miles
over the Earth, satellites have a much better range than
a regular antenna and aren’t as affected by trees,
buildings and other objects that might obstruct a
traditional antenna’s path. Satellite, Meet My TV
With its capabilities well established, it was only a
matter of time before the media industry began pondering
the satellite’s potential in television. Like
traditional broadcasting antennas, satellite television
works with radio waves as well but with a much broader
range. The older, larger dishes transmitted analog
signals that rarely required decoding. Today’s smaller
dish systems send digital signals, which produce a
higher quality of sound and video. This digital signal
is encoded into MPEG-2 format – the same format as your
DVD’s - and transmitted to your receiver box where it is
decoded and translated into an analog signal that is
then fed to your television. Why all the fuss? Digital
produces enhanced video and audio that you just can’t
get from analog. So how does it all work?
In
order to receive satellite programming, you’ll need a
broadcast satellite provider. These providers have
contracted with the various programming providers such
as HBO, Showtime and of course, all your local channels.
The programming providers send their programming to the
satellite providers who in turn send it back out via
satellite to your dish. It is then transmitted from the
dish to your receiver box where it is decrypted and
shown on your television.
Satellite television gives us the ability to have a
seemingly endless supply of programming without bulky
equipment or a multitude of unique connections. And
because satellite technology is wireless, you have the
freedom to move your entertainment system as much as
you’d like.
About The Author,
Gary Davis - Kate Ivy >>>
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