Whites-electronics MXT Pro Bedienungsanleitung PDF herunterladen (Seite 28)

Chapter 5 MXT Pro Controls

Threshold Control-

The THRESHOLD control sets the loudness of the back-

ground “hum” or edge of sound. This background “hum”

should normally be maintained during searching. In order

to hear the tiniest and deepest targets the THRESHOLD

“hum” should be set at the faintest audible level. It can be

slightly scratchy, chatter or static like but it must be constant

so as to not miss that small or deep targets. At this point, we

can’t recommend too highly the advantage of using HEAD-

PHONES. With HEADPHONES you can lower THRESHOLD

“hum” levels, and hear the faintest of target signals while

canceling out environmental background noise and improv-

ing concentration.

Threshold Adjustment-

The MXT Pro has an improved microprocessor driven

THRESHOLD control that is adjusted with a single turn. It

does not, therefore, require a 10-turn pot for precise adjust-

ment. Digital software provides much higher resolution, thus

you can set the “hum” faster and more accurately. Set the

knob all the way to the left or counterclockwise and then

rotate it clockwise until the faintest audible level of “hum” is

attained (edge of sound). If the “hum” disappears for any

reason (other than bumping the control) you may be either

swinging the coil too fast or your GAIN control is set too high,

or in the prospecting MODE you may need to increase the

speed of SAT.

Silent Search -

With microprocessor driven THRESHOLD controls argu-

ably skillful operators can “cheat the system” and use silent

search with high performance results. Once the threshold is

found, edge of sound, setting the Threshold control slightly

counterclockwise achieves silent search where no threshold

hum is heard during searching. By further optimizing Gain

to radical levels, much of the resulting noise can be hidden

under the Threshold and thus produce good eld results.

Best reserved for more experienced operators, a balancing

act between higher Gain V.S. the stronger response required

to surpass the threshold setting, must be achieved and

understood.

THRESHOLD CONTROL

“HUM”

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Whites-electronics MXT Pro Bedienungsanleitung Seite 28