Hi all, new 100B user - very happy thus far but i have a question... has anyone had any problems using audio from the xlrs while the camera was running on the power supply (not the battery)? When I try to use audio into either of the inputs while being plugged in I get a steady hum, I attribute it to interference but I'm not sure if thats a regular thing with the panny's or if its a glitch in mine... any advise would be helpful... thanx:nads: