All three are setup in the same closet as my cable modem and router, moving them further away never seemed to help.
With no attenuation installed in line, uploads from my cable modem destroy the cable TV signal for both new devices, but not the original one.
I've replaced the cable modem once in this time frame with no perceived difference.
Wireless activity has no effect.
All coax cables were ran new from the curb in my current house 6-7 years ago.
A small TV hooked to this line seems to perform properly, holding signal, but I haven't tested this much, as my main TV has no tuner.
Problems with signal always follow the device (swapping ethernet/power/cable of new HDHR with HDHR3 always works)
Never had issues with the cable modem/internet unless putting the modem behind an attenuator or something
Tried several different software DVRs, no difference. Most testing, I just use the HDhomerun app.
99% of TV watching is to a wired PC that otherwise works fine. (Windows 10 + NextPVR to Kodi right now)
Obviously every HDHR being sold now isn't garbage, they have to be working for someone or they would be out of business, but why won't they work in my configuration?
I'm probably forgetting something I've tried in the past 6 or so years here, but any suggestions toward fixing this is greatly appreciated.
Current setup if formatting doesn't destroy this (HDHR3 works, HDHR5 is a pixelated picture dropping mess)
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line in | Two way splitter | | Cable modem Two way splitter | | HDHR3 HDHR5