Can one see a possible HR (High Resistance) fault in the DLSstats/HG612 graphs,
Only when it has developed into an extremely bad fault . . . then you may see big swings in the SNRM graph (in both positive and negative directions), coupled with a significant and sudden drop in SNRM when the pair is looped (by using the telephone). See
Kitz' thread from the time when she was migrating from
Be to
Plusnet, for a good example.
as I am starting to wonder if my High RFI in the evenings is coming in from an HR fault.
b*cat begins to think that he has provided
too much technical information and kittehs are "clutching at straws".
Yes, if your pair is not operating 100% perfectly in differential mode (and, to date, I have not seen a perfect pair) then there is the potential for common mode ingress of a disturbing signal. If you also have a non-linear element somewhere in the pair that will enhance common mode acceptance . . . of Radio China International, for example.