A multiple antenna system requires a Signal Splitter to connect 2 or more antennas to run down a single cable. A signal splitter can be used as a signal combiner (signal in and out ports reversed). Signal loss is the same for splitting or combining signals. Distribution Preamps are available to overcome and improve splitter loss.
Antenna Distribution Amps
An Antenna Distribution amplifier can be used instead of a splitter / combiner. The amp has gain, not loss, can be mounted outside or inside, but does require power.
 Antennas Direct DAX 4-Output TV Antenna Distribution Amplifier
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 Antennas Direct DAX 8-Output TV Antenna Distribution Amplifier
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Multiple TV Antennas Installation |