Discrimination; Notch Discrimination - Garrett AT Pro INTERNATIONAL Owner's Manual

DISCRIMINATION

Notch Discrimination—The AT Pro's NOTCH DISC
pushbuttons are used in conjunction with the ELIM pushbutton
to eliminate trash objects from detection such as foil or pull-
tabs.
NOTCH DISC
Pushbutton
The AT Pro has 12 pixels or "notches" of discrimination (in
addition to the 40 points of High-Res Iron Discrimination).
Any combination of these pixels can be switched on or off
based upon your preference. There are two primary methods
for modifying the Notch Discrimination Pattern to reject a
specific type of trash or unwanted item.
The first method uses the NOTCH DISC and ELIM
pushbuttons (seen above) to manually modify the Lower
Scale's Notch Discrimination pattern.
Use the (+) or (-) NOTCH DISC pushbuttons to move the
Target ID cursor to the left or right. Next, press the ELIM
pushbutton to eliminate or activate the pixel located on
the Lower Scale, directly below the Target ID cursor. (See
illustrations on next page.)
22 Garrett Metal Detectors
ELIM
Pushbutton
Example: Manual Modification of Notch Discrimination Pattern
Use the NOTCH DISC buttons to position the Target ID Cursor above the pixel
you wish to eliminate (see above illustration). Use the ELIM pushbutton to
delete this pixel from the Lower Scale (see below). This item is now rejected.
The second method of modifying the Notch Discrimination
pattern involves the use of only the ELIM pushbutton. When
an unwanted target is audibly detected while hunting, simply
push the ELIM button to create a notch at that Target ID
Cursor. The next time the AT Pro encounters the same trash
item, it will not produce an audible signal.
The AT Pro's ELIM pushbutton can also be used to find
specific metal items. For example, if an earring has been
lost, scan the matching earring with the AT Pro while in the
ZERO mode. Note where the Target ID cursor appears when
the earring is scanned. Next, use the NOTCH DISC and ELIM
pushbuttons to switch off all the pixels except the one for the
earring.
Note: Depending upon how the lost earring is laying in the
ground, its Target ID may shift a little; therefore, your ability
to find it will be enhanced by turning on an additional pixel
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AT Pro International™