How Satellite TV Works

How Satellite TV Works

A satellite TV system is a really technical, highly complex system of kit together with
a satellite uplink station, the satellite out in space orbiting in a geosyncronous
orbit 22,300 miles above the earth's equator, the small mini-dish receiving unit
situated on a house or enterprise and final the receiver (black box) that connects to
your tv and means that you can view the satellite programming. Commercial
satellite TV programming has been around because the 1990's and right now it's making
big gains on the cable TV market as more and more Americans are taking advantage
of higher picture and audio quality, decrease month-to-month prices than cable and free
gear and installation that both main U.S. satellite providers, DISH Network and
DIRECTV provide. However just how does satellite TV work? On this article we'll take
an in depth take a look at the varied steps involved alongside the way to producing such a
crystal clear and reliable picture in your tv set.

Satellite TV - The Fundamentals

Satellite TV uses a wireless system of transmitting radio signals to deliver its
tv programming to the viewer's home or business. A radio signal can only
journey in a straight line however. Enter the satellite. By placing an
orbiting satellite at 37,000 km (22,300 miles) above the earth and having it match the earth's rotational speed (7,000 miles per hour) the satellite stays over the same spot above the earth.
This is referred to as being in geosyncronous orbit. These orbits are sometimes
also referred to as Clarke orbits in honor of Arthur C. Clarke who first came up
with the concept in an article he wrote back in 1945 entitled "Extraterrestrial Relays"
printed in Wireless World Magazine. The orbiting satellite then retransmits the
radio broadsolid signal back down to earth to the receiving satellite dish (mini-dish)
situated on your property or business. The signal then travels by way of coaxial cables
from the dish into the receiver that's related to your TV, where the signal is
then descrambled into viewable programming for your loved ones to enjoy.

Uplink Station

Satellite TV programming that you watch at dwelling begins with a transmitting satellite
dish zgemma star 2s (Full Survey) or antenna positioned at what is known as an uplink station. The satellite dish
located in your house is barely 18" in diameter and is tiny compared to the large satellite
dishes used at uplink stations. These satellite dishes could be as large as 9 to 12
meters (30 to 40 toes) in diameter. The good dimension of these satellite dish transmitters
allows for a a lot stronger radio signal and for higher aiming of the signal at the
orbiting satellite. The uplink dish is pointed toward a selected satellite and the uplinked
signals are transmitted inside a particular radio frequency range, in order to be acquired by
one of many transponders tuned to that frequency range aboard that satellite. The
transponder 'retransmits' the signals back to Earth but at a different frequency
band (to keep away from interference with the uplink signal), typically in the C-band (four-8 GHz)
or Ku-band (12-18 GHz) or both. The leg of the satellite signal path that transmits
the signal all the way down to the Earth station is known as the 'downlink'. Satellites can
have up to 32 transponders for Ku-band and up to 24 for C-band only satellites.
Typical transponders each have a bandwidth between 27 MHz and 50 MHz. Geostationary
Kc-band satellites should be spaced no less than 1 degree apart to avoid signal interference.
For C-band satellites the spacing must be no less than 2 degrees.