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HD TV requires another LNA signals that are different from the regular LNA so TWO cables must come into your switch system SO no a portable will not give you HD. The roof sat has two cables coming down to the receiver so you do get HD with the roof sat system.
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John & Bonnie McClun
2008 F-450 33K "BAT" Big Azz Truck
2011 MS 36TKSB3
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