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Build Your Own Free-to-Air (FTA) Satellite TV System by Dennis C. Brewer

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CHAPTER 7Getting the Signals: Aim and Synchronize the Dish

Think about it: you’re pointing a parabola-shaped dish toward the sky, hoping to align the center of the dish with a small satellite floating in space about 23,000 miles above the equator. It seems like a nearly impossible undertaking. Fortunately, communications satellites that relay television signals back to Earth are maintained in an orbit position relative to the Earth that does not change much. This path is called a geostationary orbit. To receive the signals from any one satellite, you need to aim the dish as close as possible in the direction of the stationary satellite.

If you are standing anywhere in the Northern Hemisphere, facing the North Pole, the sun appears to rise up ...

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