Hi Chaps
Just to clarify, the Ultra is available at 12v, I've got one as I've been doing mainly broadcast work.
I would have ordered 24V if I'd had any sense, but at the time all the rigs that were previously hired to me were 12V so in my rush to go freelance I never considered it. At least I can borrow batteries from my Master for Digital Links or long location days!
I think Joe may have been asking what would happen if you used 12V batteries on a 24V rig.
Only guessing here, but I think 12V would appear on the hard wired 24V pin of the 3pin lemos at rear and front of the stage.
However any output that would normally be regulated at 12V, ie the monitor socket and 4 pin hirose sockets would most probobly be dead. The raw voltage would be below the input threshold of the regulator.
Only guessing of course!
Mike