It is normal, and appropriate, to have to turn off the power switch, which removes power from the antenna amplifier, when hooked to cable. The cable is normally far weaker, especially in campgrounds with many splitters, than the output of the amplified TV antenna, and thus gets shut out. At home, or a place with strong cable, the cable MIGHT get through, but it is not expected to with the amplifier switch on.
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Marty and Martha
2015 Z-1 211RD
2012 Nissan Titan
Dalzell SC
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