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As the menus and features vary from one make of set-top box to another, which brand and model of satellite receiver do you have? E.g. if you live in the US, is it a DirecTV receiver, Dish Network receiver, etc.?
A lot of proprietary receivers don't work well for tuning channels outside what they are intended to pick up and generally cannot be unlocked to give the functionality of a dedicated free-to-air satellite receiver. For example, very few proprietary receivers work (if at all) with satellites other than the one (or group) they are intended to work with.