In this case the errors themselves aren't the issue, but are a symptom of a signal issue. Your power levels on downstream and upstream are way off, your receive is 20 and your transmit is 30 and your SNR is a bit low at 34dB. You should been within -10 to 10 on the downstream and ~39-49 on the upstream. SNR 36-41dB(typical seen) I'd say get a tech asap!
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