Satellite dish have been creating a buzz in the entertainment
industry with its capability to transmit Television Channels and Radio
Broadcast across continents. With a new edition of High Definition
transmission, it has proved to be a great success.
Satellite Dish
is a dish-shaped parabolic antenna designed to receive the transmitted
microwaves from communication satellites. These have a long history and
are of different types which include first; Motor driven dish. It is
mounted on a pole and driven by a servo or a stepper motor that can be
rotated and controlled to face any satellite position in the sky with
three competing standard USAL (Universal Satellites Automatic Location
System), DiSEqC (Digital Satellite Equipment Control) and 36V
positioners. These are among the most popular satellite dishes for HDTV
transmission as they allow more than 10,000 channels to be accessed
worldwide with no monthly charges at all.
Secondly, there are
Multi satellite dish which allows access to multiple satellites without
repositioning the dish. Due to multiple accesses, this dish is larger as
compared to motor driven dish. Then there is Very Small Aperture
Terminal Dish (VSAT); the third type commonly used to transmit
information on radio frequencies and is used to transfer short signals.
Forth
type is Ad Hoc or direct to home designed to receive audio frequencies.
When used in colligation with direct to home dish, the reception of
signal is greatly improved. The fifth type is Automatic tracking
satellites used by people traveling to remote areas which are equipped
with gyroscope to allow positional changes which let them be installed
on moving vehicles as seen in news media and government vehicles. For
the technology to draw in the signal and automatically track the
vehicle, the satellites are equipped with advanced decoders to allow
easy and quick reception.
Then there is sixth and the last type
which is television receive only satellite dish. These dishes are made
to clear the audio and video signal problems with the television set and
receive signal from the fixed type of service satellite. But in order
to receive the signal, dish must be configured in a specific line of
sight and tuned to a particular frequency. All these kind of satellite
dish allows various kind of satellite TV transmission that is Direct
Broadcast via satellite, Television Receive Only and Direct to Home
service.
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