While researching MoCA networks I found a reviewer who had the exact same situation where he was using an OTA Wanted to turn on antenna TV Signal mixed into the same coaxial cable that carries the internet signal. Without this duplexer, the signals interfere with each other and the network becomes unstable. This 100% solved my problem and allowed me to continue using my DVR to record and rebroadcast local TV shows while still having full gigabit connectivity throughout my house over the entire existing coax network!
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