It will also depend on how the cable is run. Hopefully you have separate runs starting from a splitter outside that run directly to each inside location. You can't easily split satellite like you do cable.
For the Dish Network receiver in our bedroom, I've got 100 feet of RG-6 going from the dish mounted on the patio cover to the cable TV junction box, and then another 50 feet of RG-59 in the walls of the house, and another 50 feet of RG-59 from the wall to the TV. We've never had a problem with the signal or switch operation, even though we're way over the recommended limits and not using the best available cable.
It's safer to go with RG-6, but if you already have RG-59 in your walls and can't easily pull RG-6, you'll probably find that what you've got will work perfectly fine, as long as there are no splitters inside the walls. People that claim DBS systems will not work with RG-59 are usually not speaking from actual experience, but just repeating what they heard from another misinformed person.
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