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DISCrIMINATION MODeS
• DISC Modes Overview
The AT Gold includes two Discrimination Modes: DISC
1 and DISC 2. These modes are used to eliminate trash
metal items (e.g. foil, pull tabs, nails) from detection. The
two Discrimination Modes provide more Tone ID information
than the All MeTAl Mode. Changes made to the Iron
Discrimination settings will be retained when the detector
is switched off. Discrimination filters are introduced in these
two modes, which can make them less sensitive to small and
deep targets than the All MeTAl Mode.
• Tone ID in DISC Modes
In either the DISC 1 or DISC 2 Mode, the Tone ID feature
produces up to three distinct audible tones based on a target's
metal type and conductivity. All targets are reported with
either a Medium- or High-Tone ID in the Discrimination Modes.
The operator can, however, choose to hear discriminated iron
targets with a low-Tone ID when Iron Discrimination has been
set and the Iron Audio feature is in use. (See "Iron Audio"
section, pp. 30–33 for details.)
low-Tone:
Ferrous targets such as nails, iron, steel, etc.
(The low-Tone is only heard during the use
of the Iron Audio feature to indicate
discriminated iron targets.)
Medium-Tone: Non-ferrous targets with low to medium
conductivity, including small jewelry, small
coins, foil, thin targets, etc., and ferrous
targets that ID above the Iron Disc setting.
High Tone:
Non-ferrous targets with medium to high
conductivity, including larger coins and
jewelry.
26 Garrett Metal Detectors
• Audio Characteristics of DISC Modes
The AT Gold provides more audio target information when it
is operated in one of its Discrimination Modes, as compared
to the All MeTAl Mode.
The additional audio features offered in either the DISC 1 or
DISC 2 Mode are those of the multiple Tone ID and Tone Roll
Audio. In its Discrimination Modes, the AT Gold's Tone roll
Audio provides the user with more target information to help
identify targets, particularly flat iron objects, such as bottle
caps and washers. Tone roll Audio provides a variance of
target tones as the searchcoil approaches and passes over
the target. These varying tones of audio provide better overall
target information and identification.
• DISC 1 Mode (Zero Discrimination Pattern)
This Discrimination Mode has a similar pattern to the All
MeTAl Mode—all 12 discrimination pixels are switched on
and Iron Discrimination is set to 0 (zero). Some ground
response has been filtered out in the DISC 1 Mode, but the
AT Gold will respond to all types of metal.
use DISC 1 to search for international coins (including
bronze, gold, silver, and copper), jewelry, relics, caches,
27
AT Gold
™
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