AT Pro Manual
Table Of Contents
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14
Garrett Metal Detectors AT Pro™
15
•COINS Mode
Designed to find most types of coins, jewelry, etc.,
while eliminating trash items such as iron and foil.
High-Res Iron Discrimination level has been preset
to 35 to exclude most iron targets. In addition,
one pixel of foil and two pixels in the pulltab range
have been excluded. Be aware that most pulltabs
and pieces of tabs have not been eliminated from
detection as these trash items have conductivities
similar to small coins and jewelry.
•CUSTOMMode
This mode can be customized by the operator and
the AT Pro will retain the changes when the detector
is switched off. The factory preset for the CUSTOM
Mode is the same as the COINS Mode (see above).
Begin with this discrimination pattern and then
use IRON DISC and NOTCH DISC pushbuttons to
customize the discrimination settings.
Note: Changes made to the ZERO or COINS modes
will not be retained after the detector is switched
off.
(For information on the use of IRON DISC and NOTCH
DISC, see pages 22–26.)
PRO DETECTION MODES
Zero, Coins or Custom have the same discrimination
patterns as in STD Mode. In PRO Mode, however, the AT Pro
utilizes its Pro Audio functions—including Proportional Audio
and Tone Roll Audio—to offer more target information.
The Pro Mode audio provides more target information and
faster recovery speed for separating adjacent targets. This
is especially important in areas where good targets may be
scattered amongst iron trash.
Pro Mode audio by its nature creates more audible chatter
than Standard Mode. This is normal because of the additional
sensitivity of Pro Mode. The audio depth can exceed Target ID
depth in Pro Mode so it is possible to hear deep targets that
do not register a Target ID.
Proportional Audio (Pro Mode)
Proportional audio response means that the loudness
of the target's response is proportional to a target's signal
strength. This allows the user to hear subtle changes in a
target’s response. Proportional audio response also allows
the user to better judge a target’s size, shape and depth
and has the additional benefit of faster recovery time for
separating adjacent targets.