Solving Noise; Identifying The Source Of Noise; Targets; Ground Noise - Minelab MANTICORE Instruction Manual

Solving Noise

IDENTIFYING THE SOURCE OF NOISE

Knowing what to do when your detector becomes noisy is a
key detecting skill� Accurately identifying the type of noise
you are experiencing will help you to apply the
correct solution�
Detectors are designed to process a range of complex
signals from targets, the ground, nearby electrical
equipment, and the environment� There are natural
fluctuations in the signals received by the detector
throughout an average detecting session — these changes
can result in the detector audio becoming noisy and erratic�
When detecting, there are generally three types of noise
that can be heard depending on the detector settings,
detecting location, or other factors�

Targets

Detected targets usually produce distinct, repeatable tones
that are not considered to be 'noise'�

Ground Noise

Ground noise is present when the metal detector interprets
the ground as being a target due to the changing mineral
content of the ground�
If detections are erratic but resolve when the Coil is raised
above the ground, this is likely caused by ground noise�
To resolve ground noise, adjust the
Ground Balance setting
Electromagnetic Interference (EMI)
Crackling and popping sounds when the Coil is raised
into the air and held still� This is usually caused by
Electromagnetic Interference (EMI) due to stormy weather,
nearby power‑lines or by other metal detectors operating in
close proximity�
To resolve EMI, Adjust the
Noise Cancel setting
If you have tried Noise Cancel a few times and there is still
a lot of EMI present, you can try reducing the Sensitivity
Level, or try the single frequencies to see if they are
quieter� Each time you change the frequency, perform a
Noise Cancel�
CONTENTS
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(page 57)�
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