Direct tv ?
Answers: The number of satellites depends on your area and what services you want close to HD and locals. You will need at least possible 110 and 119 but probably more. You can call DirecTV and ask them what dish you stipulation for the packages you want, they'll tell you.
Once you own the dish you can use the receiver setup menu to explain to you where to point base upon your zip code. Older receiver won't do all of the things modern receivers will so you may inevitability a new heir to use the new dish. You can ask DirecTV this also.
Bottom column for you is that you are probably going to need local professional suggestion and assistance to get a angelic reliable signal. Try to find a satellite guy who will do it on his own time.
Your receiver should own a setup screen that will make clear to you the correct azimuth and elevation settings based on your fastener code. Check under the Menu.
Your programming wishes will determine the correct dish. You are correct, most systems only have need of an 18" round dish. Some do require a 3 LNB or 5 LNB (HD) for other types of programming.
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