I'm trying to get everything calibrated. Got my Rat Shack SPL meter on a tripod and all is dandy. I want to calibrate to 85db using Avia, but the only way to get to the "set channel levels" screen on the 3803 is to let the receiver play it's OWN tones. Is there a way to turn the tones off, but still be able to adjust the channels? Currently, I'm calibrated to 75db (78db on the sub ) using the 3803's tones. I want to do it right and use Avia though. Help.