I am in the Baltimore area.
Tonight I used the HDHome Run Config (GUI) to look at channels. I got to 39, and I have 54% signal strength, 75% signal quality, and 100% symbol quality. However, the "view" button is greyed out.
I went to my LG TV, and used manual tuning to go to real CH 39. It showed usable strength and quality, but said "no signal".
WMJF has a CP to cover a digital station on RF 39. Am I seeing the testing of that, with a signal being sent, but no video content to display?