Channel selector shows three "50.1 pbs" OTA channels for Los Angeles. When view TV is selected, only the 50.1 pbs HD brings up a signal. As no signal can be found for the others, they have been "unselected" in the list. When we go to program out TIVO Roamio to record the NewsHour, the 50.1 pbs HD channel is not shown as an option. For the last two nights, the TIVO has failed to record the PBS NewsHour. We believe that is a result of it being programmed to record from a channel without a signal, but we're not given the option of selecting the channel with the signal.