Minelab GPX-4000 User Manual

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You are more likely to hear a target signal when both
the volume and the tone of the target signal change
upon detection rather than the volume alone.
A target signal on the GPX-4000 is normally a two-
tone signal. A target signal that first falls in pitch and
then rises is normally a deep target. A 'rise and fall' of
the pitch characterises a small target.
The Signal Peak control sets the level of variance
between the high and low pitch of the signal.
Signal Peak
Adjusting the Pitch Variation
of Target Signals
Tone is the pitch of the Threshold emitted by the
detector.
Large, deep targets produce a different response to
small shallow targets. It is important that you adjust
the Tone to suit the type of target you are searching
for.
A high Tone setting may help identify ground signals
from small targets. A low Tone setting may be more
comfortable on your ears.
Tone is also a personal preference. You may find that
you hear targets better in a particular range of Tone.
Try using a large and small target to adjust the Tone
to produce the most audible target signal for your
hearing.
Audio Tone
Adjusting the Pitch
of the Threshold
A high Signal setting
will increase the pitch
variation of the target
signal, however in highly
mineralised ground this
high variance of signal
may make the detector
appear noisy.
A low Signal setting
will decrease the pitch
variation, so target
signals will sound more
monotone.
People who suffer high
frequency hearing loss may
prefer to use a Signal Peak
setting of 10 or less.
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Range
Factory Preset
Range
Factory Preset
Range
Factory Preset
1 to 20
15
Range
Factory Preset
1 to 100
50

Minelab GPX-4000 Specifications

General

Brand	Minelab
Model	GPX-4000
Category	Metal Detector
Language	English