White’s Electronics MXT 300 - Manual (Page 15)

15
Chapter 5 MXT 300 Controls
RELIC MODE
*Trigger (on hand grip)
Center Position "Primary" "Two Tone ID" (disc
accept high tone, reject low tone).
In other words while operating in the Relic MODE,
targets below the DISC control setting produce a
beep lower in pitch, targets above the DISC control
setting produce a beep higher in pitch. Two differ-
ent tones, lower trash/rejects, higher good met-
als, accepts all based on the DISC control setting.
Edgy target responses are normal for this mode as
it technically is a Mixed Mode with all metal and
Disc working simultaneously. Unlike other White's
models some loop motion is always required for
good target responses. Targets singles that are not
readily identifi able are assigned a tone between the
two, Threshold pitched.
Forward Position (Alternate Mode) "DISC Sup-
presses Rejects" (at "0" DISC iron low tone/non-
iron high tone).
While operating in the Relic mode with the Trig-
ger on the hand grip in the forward position, and
the DISC control set in any typical trash rejection
setting, discrimination against trash metals occurs
like any traditional metal detector in that metals
below the Disc setting are suppressed (quiet or
broken) and metals above the DISC setting produce
a smoother solid beep. With the trigger forward
and the DISC control set to ZERO, however, fer-
rous metals (iron) produces a lower pitch beep and
nonferrous metals (not iron) produce a higher pitch
beep.
Squeezed and held "Pinpointing/Depth Read-
ing".
When operating in the Relic MODE when the
Trigger on the hand grip is squeezed and held, the
display provides a screen that indicates the depth of
coin, medium button, medium bullet sized targets.
Once released the trigger will automatically return
to the Center "Primary Search" position.
*DUAL CONTROL DISC Preset.
While operating in the Relic MODE the DUAL
CONTROL functions as a traditional discrimination
control. Further clockwise settings provide greater
degrees of trash metal rejection. Further counter-
clockwise settings provide lesser degrees of trash
metal rejection.
PROSPECTING MODE
*Trigger (on hand grip) - Center Position "Pri-
mary Searching" (iron audibly grunts).
While operating in the Prospecting MODE, iron
targets 80% and over produce an audio grunt when
detected.
Forward position (Alternate Mode) "Without
Iron Grunt" (all targets same audio).
The audio produces the same basic VCO audio beep
(zip sound) regardless of metal type. Iron doesn't
grunt.
Squeezed and held "Temporally Disables (stops)
ground tracking".
Depth reading can only accurately be calibrated by
knowing ahead of time approximate target size. No
two nuggets are the same size so any attempts to ap-
ply depth indications are fundamentally fl awed (in
error). Therefore while operating in the Prospecting
MODE rather than giving a known fl awed depth
indication, squeezing and holding the Trigger on
the hand grip simply and temporarily stops ground
tracking. This is an important feature. In order for
the MXT 300 to recognize a target in mineralized
ground it must fi rst be able to cancel the ground
mineral. This is done by the fast tracking system
built into the software. It must actually see ground
with every sweep (on either side of the target) in
order to separate the target from the ground. This
is easily done during the normal process of detect-
ing. However, when a target has been detected, the
user usually hovers for a while over the target and
makes repeated passes in order to decide whether
or not to investigate the signal. thus, analyzing
audio and display information. This hovering can
often cause the detector to see more target than
ground and cause the detector to think the target is
ground and attempt to track into it. Squeezing and
holding the trigger when analyzing the signal stops
tracking and prevents errors.
*DUAL CONTROL SAT Preset.
While operating in the Prospecting MODE, the
DUAL CONTROL functions as a Self Adjusting
Threshold (SAT) control to smooth inconsistencies
in the ground and thus the Threshold. More on SAT
under the section dedicated to the DUAL CON-
TROL.
Chapter 5 MXT 300 Controls