if you put the radio on the data channel, you should see ids on the screen.
if not, you are either out of range or have it programmed to the wrong edacs system.
how strong is the data channel? if its noisy, the 780 probably wont decode it. to solve that problem, you can buy anexternal antenna or upgrade to a bc796- it has a better decoder in it for fringe areas.
also, make sure you have the channels in the correct order and not locked out.
hope this gives a clue
bill simpson
n1jbs