I have been hunting with my trusty M6 White's unit ... and doing well. Been thinking about upgrading and the planets finally aligned with the bank. Picked up a gently used VX3 and related items from a buddy who cannot spend time like he once did in the hobby. My issue is that I hear a low hum in the background all the time ..... and of course that is not something I have dealt. Is there a way to adjust the settings to eliminate that irritating distraction? Any tips would be appreciated.