[B-R-I] UnID Ch.s 60-61?

[Kaimbridge M. GoldChild]

For the past few months I've noted a strange signal/static on Ch.s 
60-61.  I figured it may be just some local interference, but the 
other day I was up at the donation/thrift shop at Endicott Plaza in 
Danvers and there was a couple of working, portable, analog TVs, so I 
checked and——sure enough——Ch.s 60-61 had the same signal.
Could this be "Broadband over Power Lines" or some other "white space 
spectrum" signal testing (it doesn't look like "MediaFLO" on Ch.55)?

      ~Kaimbridge~

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