6
Reactivity
The Reactivity is a key parameter for adjusting the depth capability of the machine.
At a low level of Reactivity:
• It achieves optimal depth performance.
• It cancels out electromagnetic interference (EMI) and small targets.
• It slows down the machine’s response speed and increases the length of the signal.
• It reduces noise caused by shaking effects and coil movement, especially when
using a low ground effect adjustment (<85).
SENSITIVITY
MENU
90
Determines the device’s sensitivity level from 0 to 99.
The most commonly used sensitivity levels range from 70 to 90. Reduce the level
in trashy areas or close to power lines, fences, radio-relay stations, etc.
Do not test your device indoors as there is considerable electromagnetic and metal
interference in urban environments (EMI).
Sensitivity
The IAR discrimination method (Iron Amplitude Rejection) allows rejection of
ferrous items according to their distance from the coils.
OFF = no rejection 3 = Shallow Ferrous rejection 5 = Shallow and deeper Ferrous
rejection.
The XTREM HUNTER naturally ignores small ferrous objects such as nails,
bottle caps, etc. For moderately sized ferrous objects like anchors, hammers,
IAR Discrimination
horseshoes, you can discriminate them using the DISCRI IAR setting, which will result in a low-pitched tone.
The background Iron Rejection processing operates in motion mode, which means you need to be in
This feature is used to set the amplitude of the background sound threshold (HUM).
The Threshold can be increased to mask low sound variations and can act as a
form of sensitivity by drowning out the noise in the threshold hum.
However, it’s important to note that faint signals and deep targets may also be
masked by the threshold, so it should be used in moderation.
Threshold
DISCRI IAR
THRESHOLD
DISCRI IAR
MENU
1
THRESHOLD
REACTIVITY
Ferrous signal example
with Discri IAR: ON
MENU
motion to receive the low-toned response from ferrous targets. If you stop on a
target, the Iron Rejection will not be effective, and the audio will produce a mid-tone
response, indicating a non-ferrous target.
The graphical target display will show ferrous (of moderate size) in shades of gray.
Be cautious if the ground is filled with ferrous objects Iron Rejection may mask
larger and deeper targets. In such highly contaminated areas, it is recommended
to raise the XTREM HUNTER from the ground using the handle’s height adjustment
feature or by directly holding the aluminum frame to further distance it from the
ground. This will maintain excellent performance and significantly improves stability.
THRESHOLD
MENU
2
REACTIVITY
AUTO TUNE
REACTIVITY
MENU
1
AUTO TUNE
FREQ. SHIFT
At a high level of Reactivity:
• It helps to pinpoint the target’s position more precisely due to the faster response speed.
• It produces shorter audio signals.
• It enhances target differentiation in environments with a lot of trash and clutter.
• Do not change this setting frequently if you want to accurately gauge the target on the LCD graphic indicator.
• The lower you set the Reactivity, the slower your walking pace should be.
