Manual Sensitivity - Minelab GPX 6000 User Manual

Manual Procedures and Settings
Go beyond the factory default Automatic settings to gain even greater control of
your GPX 6000™� This section describes how and why you should adjust key detector
settings to optimise your detector for specific detecting scenarios�

Manual Sensitivity

Choose the highest stable manual sensitivity setting for optimum performance, or use
the automatic settings�
Sensitivity levels 1 to 10 are manual sensitivity settings� By default, these manual sensitivity settings have a constant audible
Threshold Tone that converts all incoming signals into an audible tone� The Threshold Tone will have very small variations that
is the background tone� The Threshold Tone is optional, and can be turned on or off
These small variations in tone are easily discerned by the human ear, and make tiny signals more apparent than if there was
no Threshold Tone� Listening to this tonal variation while you adjust the sensitivity allows the greatest number of target
signals to be heard above ordinary ground signals or interference, thereby maximising your detecting depth�
Manual Sensitivity Adjustment Procedure
` Always try Noise Cancel
` Generally start with a Mono coil unless you are detecting in areas with known high levels of EMI or soil conductivity�
When setting the sensitivity manually, select the highest level where you can detect small variations in the Threshold Tone,
and no higher� This will maximise the detector's sensitivity to gold� There should be some variation in the audio responses,
but it should not sound erratic�
START `
1. Set the sensitivity to level 1.
2. Increase until false signals occur.
3. Reduce by one level.
4. Check over the ground and
reduce if needed.
Manual Sensitivity guide
Manual — Low
Smoother audio
`
` Some target signals may not be audible
Only use if Noise Cancel and Quick‑Trak
`
do not reduce noise
` Threshold tone On by default
CONTENTS
(page 13) and Quick‑Trak (page 16)
(page
to resolve noise before reducing the sensitivity level�
Reduce the sensitivity to level 1 using the minus button�
If noise is the result of EMI, keep the coil stationary while
`
adjusting the sensitivity�
` If noise is the result of ground noise, swing the coil close
and parallel to the ground while adjusting the sensitivity�
Reduce the sensitivity level just enough that the false
signals disappear�
Sweep the coil over a clear patch of ground, and reduce the
sensitivity level further if any ground noise is encountered�
Manual — High
Likely to hear more targets in
`
low‑noise conditions
` Some targets may be masked by noisy audio
Threshold tone On by default
`
12
22)�