8
CONTENTS
BEYOND DEFAULT SETTINGS
Go beyond the factory default 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 GPX 6000 for specific detecting scenarios.
Sensitivity
Choose the highest stable sensitivity setting for optimum performance, or use the
automatic settings.
Adjusting the Sensitivity
When setting the sensitivity level, find a level that is high enough to hear target signals over typical environmental noise, but
not set so low that targets are not detected. As a guide, there should be some variation in the audio responses, but it should
not sound erratic.
`Always try Noise Cancel (page 13) and Quick-Track (page 9) to resolve noise before reducing the sensitivity level.
`Generally start with the Mono coil unless you are detecting in areas with known high levels of EMI or conductivity.
1. Set Sensitivity to level 1
Reduce the sensitivity to level 1.
2. Increase until false signals occur
Increase the sensitivity until false signals begin to occur.
`If noise is the result of EMI, keep the coil stationary
when adjusting the sensitivity.
`If noise is the result of ground noise, swing the coil
close and parallel to the ground when adjusting the
sensitivity.
3. Reduce by one level
Reduce the sensitivity level just enough that the false
signals disappear.
4. Check over ground and adjust as
needed
Sweep the coil over a clear patch of ground, and reduce
the sensitivity level further if any ground noise is
encountered.
Sensitivity levels guide
Manual Auto
Low Manual Sensitivity
`Smoother audio
`Some target signals
may not be heard
`Has threshold tone
`Only use if Noise
Cancel and Quick-Trak
do not reduce noise
High Manual Sensitivity
`Likely to hear more
targets in low-noise
conditions
`Some targets may be
masked by noisy audio
`Has threshold tone
Auto
`Provides smoother
audio
`No threshold tone
`Recommended for
most users
Auto +
`Use in low EMI and low
ground noise locations
`No threshold tone