Minelab Explorer User Manual page 7

THE MINELAB EXPLORER
www.minelab.com
Discrimination
1 Discrimination is the ability of a
metal detector to identify the user's
desired target (e.g. jewelry) and
eliminate signals from undesirable
material (e.g. nails).
The Explorer can be programmed in
a number of ways to discriminate
against unwanted targets in
different types of ground.
Figure 1.3. Metal detector comparisons
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MINELAB'S UNIQUE TECHNOLOGY
Full Band Spectrum (FBS)
When developing Full Band Spectrum (FBS) technology, Minelab's
scientists looked at improving the already successful Broad Band
Spectrum (BBS) technology used in previous Minelab detectors.
Discussions with seasoned treasure hunters from around the world
identified a number of possible enhancements for operators. The
improvements to the Explorer detectors include:
• increased detection depth;
• accurate identification of targets to greater depth;
• enhanced detection of desired targets amidst iron trash;
• adjustments to improve operation for searching salt-water
beaches.
Most detectors on the market
operate on a single (or dual)
frequency, ranging from 1 to 70
kilohertz (kHz). Although this
technology has served the industry
well for years, Minelab's scientists
found that a frequency that worked
well in one area would often offer
only marginal performance when
used in another location. Ground
mineralisation, trash content, and
target size all had an effect on how
effective a detector transmitting a single frequency would operate.
Full Band Spectrum technology combines Minelab's existing multiple
frequency BBS technology with a powerful new microprocessor to
give:
• greater detecting depth;
• consistent sensitivity over a wide range of targets;
• less interference from electromagnetic sources;
• more accurate identification of target characteristics.
The Full Band Spectrum (FBS) circuit automatically transmits 28
Operating Frequencies
frequencies simultaneously. This increased frequency range means
that the signal received from the detector coil is analyzed from a
A metal detector's
wide range of responses. This information is relayed to the operator
electromagnetic operating
via the speaker or headphones and the control panel's liquid crystal
frequencies are measured in
display as an audio or visual target response.
kilohertz (kHz).
Put simply, Minelab's unique FBS technology means deep, sensitive,
accurate detecting.
Low signal frequencies
(e.g. 1.5 kHz) penetrate
deepest, but sensitivity to
Ground Compensation
smaller targets is low.
The Explorer uses a sophisticated approach to the elimination of
On the other hand, higher
ground mineralisation. It uses advanced digital filtering to eliminate
frequencies have a more
the influence of ground signals.
shallow depth of penetration
but high sensitivity to small
targets.
You are now ready to proceed to Chapter 2: Assembly.
The Explorer's multiple-
frequency operation provides
the advantage of both.
THE MINELAB EXPLORER
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MINELAB'S UNIQUE TECHNOLOGY