Instruction Manual
Page 5
BBS Technology
When developing BBS technology, Minelab’s engineers first looked at the
technology that was already available on the market and identified its
limitations in field use.
Discussions with seasoned treasure hunters from around the world identified a
number of common problems facing detector operators. These problems
included:
•
Loss of detection depth in highly mineralized ground
•
Inaccurate target identification beyond 5 or 6 inches
•
Inability to detect good targets in close proximity to iron trash
•
Erratic operation when searching salt-water beaches.
BBS circuitry allows the Excalibur to operate automatically at 17 different
frequencies simultaneously — a feature that is unique to Minelab metal
detectors.
Most detectors on the market operate on a single (or dual) frequency, ranging
from 1 to 70 kHz. Although this technology has served the industry well for
years, Minelab’s engineers found that a frequency that worked well in one area
would often offer only marginal performance when used in another location.
Ground mineralization, trash content, and target size all had an effect on how
well a detector transmitting a single frequency would operate.
The BBS circuit automatically transmits 17 frequencies simultaneously,
ranging from 1.5 to 25.5 kHz in 1.5 kHz increments. The signal received from
the coil is analyzed and information is relayed to the operator via the
headphones. Through the use of its 17 frequencies, the Excalibur is able to
find and accurately identify targets at maximum depth, regardless of the ground
conditions or trash present.
Essentially, when using an Excalibur with BBS technology, it is like swinging
17 single-frequency detectors at the same time. Because BBS operates at a
number of frequencies that no other detector does, BBS detectors such as the
Excalibur can find objects that no other detector has the ability to find.
