teleview and ADTech,
A quick follow-up...
Checked with WRC Engineering who indicated everything was optimal and there were no known issues. This past Sunday, the WRC-TV signal remained solid all day and evening, including at the two other nearby OTA folks having the same problem we saw earlier. Monday the signal was solid at any hour and has been so this morning. What ever the problem was, it appears to have gone away, at our location and the two other OTA installations. Ain't electronics great?
-Rod
(retired SMPTE member)