I received a call-back from the chief engineer for the local NBC station on Tuesday. He informed me that he had talked to DirecTV and that DTV had rebooted a piece of their equipment. He asked me to monitor the NBC broadcasts and report back to him if I were to see any more signal issues. Unfortunately, I had one issue on Wednesday evening, and three issues on Thursday evening. For the Thursday incidents, I verified that the picture dropouts occurred at the same time on the OTA broadcast, which I was also recording. Needless to say, whatever actions DTV took did not resolve the issue.
I still don't understand how the issue could be DTV's fault if it occurs on the OTA signal as well. Can anyone explain this?