Whites MXT PRO, Руководство пользователя

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5. In the Prospecting MODE the use of the SAT (variable
self-adjusting threshold) control will help to maintain a rea -
sonably smooth THRESHOLD “hum” particularly at higher
GAIN settings and will be covered in a later section.
6. While using a steady slow search coil sweep speed,
simultaneously advance GAIN towards “+3”. If the “ OVER-
LOAD-REDUCE GAIN/ LIFT LOOP” alert keeps popping up
on the display, if a relatively smooth background THRESH-
OLD “hum” doesn’t continue, or if ground noises are a
problem reduce GAIN.
7. The trash I.D. capability of the MXT Pro also functions
more accurately when the GAIN is set at a level that allows
for reasonably smooth operation. Too much GAIN can cause
bad ground to distort the proper identification of iron and
non-iron targets.
8. Note: It is normal to hear changes, clicks or soft beeps,
coming from the audio (speaker) during GAIN adjustments
as the circuit shifts between hardware and software gains
(different electrical parts of the circuitry). The GAIN control
adjusts both the hardware gain (hard physical component)
as well as the software gain (computer code) alternating
between the two throughout its range. As the MXT Pro shifts
between these two intricate parts of the circuitry an audio
indication notes the transitions. This can be helpful. If you
adjust the Gain slightly, the audio notes significant rather
than slight change with these audio shifts.
9. The MXT Pro provides more GAIN control range than is
typically useful assuring performance. Few areas will allow
maximum GAIN (full clockwise) without at least some degree
of noisy operation. Setting in the + area requires a high
degree of operator skill.
Chapter MXT Pro Controls
indicates a very large target, sweep loop higher over area to
confirm if the target may be of interest.
NOTE- Ground Mineralization too high, large or shallow
target message.
Gain Adjustment
1. The GAIN control knob turns the MXT Pro ON and OFF
and controls the GAIN. Starting from the POWER OFF
position and going clockwise, the power is turned ON and
the dial increases the GAIN from a minimum level of “1” to a
maximum level of “+3”. Set the control to the “Initial Setting
Triangle” (between level 9 & 10).
2. Although the setting of (9-10) gives more than ample
GAIN, if the ground mineralization is low enough, you might
attempt to raise the GAIN above this level 3.
3. The object of increasing the GAIN is to get the maximum
available depth from the detector WITHOUT causing dif-
ficulties in recognizing real metal targets, and without the
“OVERLOAD-REDUCE GAIN/LIFT LOOP” message ap-
pearing (when the search coil is over ground, IS NOT over
a metal target) indicating a ground mineral overload of the
circuit.
4. In addition, any increase in GAIN adjustment should NOT
BE at the expense of maintaining a reasonably smooth and
constant THRESHOLD “hum”. False signals, beeps and stat-
ic from bits of mineralization, erratic behavior, and prolonged
lapses in THRESHOLD, all can be the result of running with
too much GAIN.