Instruction manual
91Understanding your X-TERRA - Final Words
Hot rocks
Hot rocks are rocks that are mineralized dierently to their surrounding ground. For example a highly
mineralized rock buried in mildly mineralized ground would be considered to be a hot rock. However, a
highly mineralized rock in an equally highly mineralized ground would not be considered to be a hot rock.
Ground mineralization
Ground mineralization refers to how magnetic the ground is. This doesn’t mean that mineralized ground
produces a magnetic eld, but it does mean that particles or grains in the soil will be attracted to a
magnet.
Noise Cancel
Noise cancel is a metal detector feature that shifts the metal detector’s operating frequency or frequencies
to reduce the eect of environmental electrical noise, such as power lines, cell phone towers and other
metal detectors.
Non-ferrous
Non-ferrous materials do not contain iron and are not attracted to a magnet. e.g. coins, gold & silver rings,
copper artefacts.
Signal
Signal refers to both the transmitted magnetic eld from the detector’s search coil and the received
magnetic eld from a metal target.
Target
Target refers to any metal object that can be detected by a metal detector. A target can be either valuable
coins or junk like bottle tops. The term does not refer to the value of the object.
Target ID (TID)
TID numbers are numbers that identify targets based on their ferrous and/or conductive properties.
Threshold
Threshold is the continuous sound emitted by a metal detector that is used by the operator to monitor for
target signals . The Threshold will also blank to indicate that a discriminated target has been detected.
VLF - Very Low Frequency (also known as CW – Continuous Wave)
VLF is a type of metal detection technology. Metal detectors that use VLF technology create an
electromagnetic eld that is applied to the ground in a continuous wave.