Does the CTX 3030 have a "Learn function" like the Explorer did where you could press "learn" and run an object under the coil and then it would only identify "like" items? Is there a quick set up for this if it exists? I need to hunt for an item in a few hours. The person has an identical item to the one that I will be looking for. There's lots of nearby metallic objects that are driving my detector crazy. Thank you for any ideas. Jody...