62
GPX 5000 Range
GPX 4800 Range
Factory Preset
63
GPX 5000 Range
GPX 4800 Range
Factory Preset
1–20
1–15
11 (GPX 5000), 8 (GPX 4800)
Rx Gain
Adjusting the sensitivity of the detector.
The Rx Gain function allows the GPX Series to be optimised for
differing conditions; controlling the sensitivity of the detector
to its environment and targets.
With a high Rx Gain setting the detector will pick up
smaller and deeper targets, but may respond to unwanted
interference and ground noise. A high Rx Gain setting is
recommended for mild soil conditions and areas of low
interference.
With a low Rx Gain setting the detector will pick up less
unwanted noise and ground signals, but may miss deep
targets. A lower Rx Gain setting is preferable for variable,
‘noisy’ conditions or high interference areas.
The Rx Gain control should be adjusted to suit the soil
conditions and the coil being used. For example, if you have
found some nuggets in an area and wish to detect the same
spot with a larger Monoloop coil it may be necessary to
reduce the Rx Gain setting.
Always ensure the detector is properly ground balanced, and
tuned, before making any changes to the Rx Gain setting.
Note: Be prepared to reduce the Rx Gain setting if the
background threshold is erratic. A smooth threshold is
preferred, as a lot of noise will drown out a soft target signal.
Tip: Try using a slower
Motion setting (p. 62)
to allow a higher
Rx Gain setting.
When using the Coil/Rx
switch in Cancel (p. 36) a
higher Rx Gain setting may
be possible.
Very Slow, Slow, Medium, Fast
Very Slow, Slow, Medium,
Slow
Motion
Adjusting the sweep speed.
The speed at which you sweep the coil has an effect on target
response time and Ground Balance adjustment. Matching your
preferred coil sweep speed with the corresponding Motion
setting can reduce noise and improve target signal responses.
Very Slow and Slow
This Motion setting provides a stable threshold, making it ideal
for beginners and most detecting situations. When carefully
detecting a small area, a Slow Motion setting will ensure good
depth and sensitivity. For maximum performance, a very slow
and steady coil sweep needs to be employed when using the
Slow Motion setting.
Note: It is quite important that the Motion setting you select
matches the speed at which you swing the coil.
Medium
This Motion setting will often improve performance if a
more moderate sweep speed is used. Background noise may
increase just slightly compared to the Slow setting, so it is ideal
for the more experienced operator.
Fast (GPX 5000)
Fast Motion is useful when using a fast sweep speed to cover
ground quickly. In these circumstances, a quick sharp target
response will alert the operator to a target. Fast will allow you
to cover more ground in a shorter amount of time.
Note: The Motion speed also effects how susceptible the
detector is to external interference. Basically, the slower the
Motion speed the less interference you will get; resulting in a
smoother Threshold.
If the Threshold is too unstable while you are using Medium or
Fast Motion, you can select Quiet Audio Type (p. 64) or reduce
the Rx Gain (p. 63).
To Next Page
Loading...
Need help?
General
