Minelab GPX5000 Instruction Manual page 19

Threshold
34
Continued...
When the Threshold is too
high a faint signal is masked
Threshold level
and only the peak of the
loud signal is audible
Audio Range that
above the Threshold.
you are able to hear
With the Threshold set
correctly both target signals
are easily heard.
Audio Range that
you are able to hear
Threshold level
aint signal Loud signal
w inaudible audible
A Threshold level that is too
low does not allow faint target
signals to be heard.
Audio Range that
you are able to hear
Faint Loud signal
Threshold level
signal just audible
masked
Audio Range that
you are able to hear
Faint Loud signal
Threshold level
signal just audible
masked
Faint Very
signal loud
signal
Faint signal Loud signal
now inaudible audible
Soil/Timings
Optimising the detector for different soil
and target types.
GPX 5000 Range
GPX 4800 Range
Factory Preset
Note: When switching
between Soil/Timings, there
is a one second pause before
detection continues.
Faint signal Loud signal
now inaudible audible
Audio Range that
you are able to hear
Threshold level
Faint
signal
Normal, Enhance, Sens Smooth, Fine Gold, Sens Extra, Salt/Gold, Sharp, Coin/Relic
Normal, Enhance, Sens Extra, Sharp, Coin/Relic, Salt-Coarse
Special: Fine Gold (GPX 5000); Sens Extra (GPX 4800)
The GPX Series Timings define the characteristics of the
Transmitter (Tx) and Receiver (Rx). The Soil/Timings switch
allows you to choose from a range of different Timings. This
optimises the detector for different soil conditions, the type
Audio Range that
of coil being used and desired target sizes. Soil/Timings can
you are able to hear
make a big improvement to your finds.
Certain Timings have a particular affinity to certain soil Threshold level
conditions (magnetic, alkaline, neutral, etc.) and on different
target sizes and conductivities. By using the Soil/Timings
switch, changes to the timings can be made to improve the
performance in different conditions.
Normal
Normal gives you the best performance on a wide range of
soil conditions, and it will provide the best depth on a wide
variety of target sizes. It works particularly well with Double D
coils for general detecting. You should always use Normal in
new areas where you are unsure of the soil mineralisation and
the depth/size of targets.
Enhance
The Enhance timing is very effective at cancelling most
ground noise signals, and significantly reduces the response
on hot-rocks. It works very well with monoloop coils in all but
the most extreme soil conditions. It is very sensitive to a range
of target sizes.
Special
Special (p. 57) is the switch position for selecting one of
the extra Timings available through the LCD menu. You
can choose between Sensitive Extra, Sharp, Coin/Relic and
Salt-Coarse (GPX 4800 only) for the GPX 4800; plus Fine Gold,
Smooth and Salt/Gold for the GPX 5000.
Very
loud
signal
Always remember to re-Ground Balance the detector after
making any changes to the Soil/Timings switch.
35
Faint Very
signal loud
signa