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.
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