I viewed the installation video for the 5 LNB dish at solidsignal dot com (being new I can't post links)
One of the points stressed in the cabling portion of the install was the new dish uses a much wider frequency band then the older dishes. They stress the RG6cable needs to be solid copper center with compression connectors (not crimped). Further, the ground blocks and wall plates need to be compatible with the broader frequency range.
Evidently some OTA use the same cable as the satellite (multiplexing) to carry their signal. This can also result in interference.
It seems possible with the much wider frequency range, higher voltage and potential for interference of the new systems many of the problems are not actually in the HR20 but in the legacy cabling.
Maybe that could explain some reception issues (e.g. "Searching for Satellite" messages), but you should have some clues about that by checking signal readings on the various satellites/transponders. It's certainly another variable in the equation.
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