Noob question. I found an old Sony PVM-14m2u in the garage. Trying to hook it up and can't seem to figure this out. Do I plug the bnc sdi into the a or b bnc in's? That's what I've done but I can't figure out what button combination to press on the monitor to see the signal. I can send the signal out of after effects sd 8 or 10 bit. Works like a charm on my JVC HD monitor... Sorry I've tried all combinations.