[ADTech]

The Directv AM21 tuner is limited to only the channels that Directv provides guide data. If they don't send guide data, you cannot tune it with the AM21.

However, all may not be lost as it is sometimes possible to enter an alternate market zip code and pick up subchannel. You would have to tell some kind of useful information, though, like your zip code and what local station carries that sub-channel and what its virtual channel number is.