The FLO TV engineers can also keep an eye on the state of the remote transmitters in more detail back in the operations center. The map shows transmitters that haven't been powered up yet, like in Milwaukee and Cleveland, new transmitters that are installed but not yet broadcasting, like in New Jersey and Miami; and the live transmitters, which are marked as fully working or with a warning if there’s a known problem.

Qualcomm doesn’t put up any new TV masts on which to mount its transmitters as they’re all on existing towers. The number of individual transmitters in each area varies depending on the topography of the area and how high the masts are. One transmitter can cover 18 to almost 25 miles if there are no mountains in the way. So Kansas only needs two transmitter sites but San Diego has 12.