said by WayneF:
There are a few exceptions, but it is very common that my overnight recordings, 1 to 3 AM time frame, are interrupted, and become two partial files with a small time gap. Why is that? It is not power, there is a UPS on it now.
It is likely am emergency broadcast system test of some sort. This will always stop the recording and start it up when the system is released by the originator of the test. Not this is not done by Verizon.