Also, be cautioned. My NBC channel always showed 100% and even up to last night. But every recording I did of the .01 channel came out heavily pixelated, hanging and sound lags.
But last night, I had a thought. I have about 3 TV's off the OTA antenna so I was getting a conservative 6 db leg loss. I had an ancient Radio Shack 10db UHF amp (the old square shiny metal box ones) that i should have pitched years ago. Luckily I'm a pack rat.
I dug around, found it and just patched it before the downstairs splitter. End result as of tonight, all recorded shows are pitch perfect and no breakups at all.
So even if it shows 100% that does not exactly mean that it's up to snuff to record the OTA digital stream.