Will an A/B switch work in reverse?
I have a single coax line running into my motorhome, which is usually used for satellite. Occasionally, when in an RV park with cable, I will hook up to that rather than setting up the satellite, but...
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Also, watch the diplexer (splitter) you buy. Some don't pass power at all. Some pass power to only one of the legs. Some pass power to both legs. In my diagram above, one of the diplexers passes power on both legs, and one only passes power on one leg so I don't get power backfed into the cable system.
