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Audio Type
Changing the Audio
Response of Target Signals
The Audio Type function replaces the Boost switch
on the GP series detectors. There are four options to
choose from. Each setting changes the way that the
detector interprets a signal and how that signal is
produced as an audio response.
Quiet
This setting gives the most reduction of both ground
noise and interference. The signal response is slightly
quieter compared to the other Audio Types. Quiet
should only be used in the most extreme situations.
Normal
This may be used for general detecting conditions.
Normal provides the best compromise for signal
response and Threshold stability.
Deep
This setting is the preferred Audio Type when
searching for larger targets at depth. It works well in
combination with the slower Motion options where
target signals come through loud and clear, but
noises from the ground and electrical interference
are somewhat filtered out.
Boost
This is a more aggressive Audio Type. Boost will
provide very sharp target signals but will also
increase any signal caused by ground noises or
electrical interference. It is best used in milder soils
and well away from electrical interference.
Note: Each Audio Type will have a different optimum
Rx Gain setting so you should check the level of Rx Gain
if you make changes to Audio Type.
Range
Quiet, Normal, Deep, Boost
Audio 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 to adjust
the Audio Tone to suit the type of target you are
searching for.
A high Audio Tone setting may help identify small
targets from ground signals, but a low Audio Tone
setting may allow deep target signals to stand out.
You may find that you hear targets better in a
particular range of Audio Tone. To produce the most
audible target signal for your hearing try using a
large and small target to adjust the Audio Tone.
Audio Tone
Adjusting the Pitch
of the Threshold
Range
1–100
Summary of Contents for GPX-4500
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