White’s Electronics MXT 300 User Manual

Page 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