My DFX came back from Whites and took it out for a walk, Scored a 1940 quarter and a 1940 Wheat. Question, I notice the sound lingers a little longer then the XLT after it goes over a target. Does this sound right?? I know my XLT and this is what I noticed right away using the DFX. its right on for ID and pinpointing is right on also, just seems to sound off a little longer going over a target