I have had this detector for Christmas and so far the all metals setting seems to work fine, I cant get my head around the notch or auto notch though. It just seems to bleep at random times in these settings.

__________________
Thanks to Yahoo! Answers

The detector has two distinct systems:
1. ALL METAL No-Motion Mode: In this setting, detected targets will cause the detector to sound off for as long as the target is under the searchcoil—motion is not required to detect a target. When operating in the ALL METAL Mode, adjust GND BAL(GROUND BALANCE) to ensure proper mineral elimination. It is required to push GND TRAC several times after adjusting GND BAL. All targets will be detected with a medium tone.
2. Motion DISC (DISCRIMINATION), NOTCH and AUTO NOTCH Modes: Operates with three-tone audio target identification. GND TRAC does not apply in these modes. User can adjust DISC and NOTCH to reject any trash item. Motion is now required to make a detection. Items will be tuned out if coil is not in motion.

Do not attempt to test unit by placing a coin or metal objects onto a floor. Most floors contain metal which interfere with the detector’s operation.

__________________
Yahoo! Answers