Originally Posted by jdawg61
I'm especially wondering if I need to have the OTA antenna run to the BOLT on a separate coax cable or if it can be put on the same coax as the MoCA network with splitters, diplexers, etc. All of the coax is run from a junction box on the outside of the house to the various rooms. The internet cable also comes into the junction box before running into the house.
You can definitely put your OTA antenna signals onto the same coax carrying MoCA, or you could have cable TV/Internet signals on the same coax as MoCA; what you can't do, contrary to TiVo's "Antenna with MoCA network" diagram, is have both OTA antenna and cable TV/Internet signals on the same coax lines.
I've replied in detail over on the TiVo Troubleshooting Forum where you'd first posed your question, albeit 3 weeks ago.
'gist: Cleanest solution is to run a 2nd coax line from the junction box to your Den, to provide a dedicated coax line for your MoCA adapter, which you would then connect to a designed-for-MoCA coax distribution amp whose input is connected to your antenna.
If unable to make the 2nd coax run happen, your next plan of attack might be to use an antenna/satellite diplexer as a MoCA-passthrough, of sorts, between the cable TV/Internet and OTA antenna coax segments.
meh, what the heck, here's what I'd posted...
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As for your problem, coincidentally I was thinking about just this sort of problem the other day and diagrammed a possible solution, which is similar to TiVo's above diagram... except you use the SAT port of an antenna/satellite diplexer between the antenna and cable segments of coax (with the VHF/UHF antenna port terminated), in combination with a distribution amp, to ensure the signals don't stray onto each other's lines.
Substituting "JCT" for "Wiring Closet," and "Den" for "Room with Cable Modem," the diagram should demonstrate what you need to do.
Note that the distribution amp is critical in that it is needed to block any cable TV/Internet signals in the 950+ MHz range (which *would* pass through the SAT port of a diplexer) from passing back up to the antenna. (A simple splitter in place of the distribution amp would be problematic.)
Further, ideally the amp would be a designed-for-MoCA amp, with a built-in MoCA filter, as the MoCA filter would then be on the downstream side of the amplifier circuitry, providing a stronger reflection of MoCA signals back onto the outputs. (In which case, then, the separate "PoE" MoCA filter on the input to the amplifier would be unnecessary.)