White’s Electronics Goldmaster GMT - Manual (Page 2)

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Introduction
All White's ground canceling detectors are capable of finding gold nuggets in the ground.
However, none will perform as efficiently as the line of Goldmasters created especially for nugget
hunting. The new GMT is the culmination of a series of Goldmasters, refined and improved over
the years. With the addition of Fast Ground Tracking the GMT is the ultimate Goldmaster.
The reason the Goldmaster stands above all other detectors in finding gold nuggets is the
care taken to accommodate the particular conditions encountered while gold prospecting. Since
gold is most often found in highly mineralized soil, it was necessary to design a ground balance
circuit which had the range to cancel out both extremes (+) and (-) mineralization. The GMT has
made it easier to achieve and monitor ground rejection by utilizing digital microprocessor soft-
ware to automatically track out (eliminate) ground mineralization. In addition to automatic elimi-
nation of ground minerals, the GMT retains the manual ground balancing system perfected for its
predecessor, the GM/4B. In this way, the GMT will satisfy both preferences, manual or auto-
matic.
All of these refinements are enhanced by incorporating a new, state of the art, iron identification
system. This unique development applies digital analyzing to accurately predict the probability of
a target being iron and thus reduce the amount of iron trash being dug. This exclusive Iron I.D.
system is presented to the user both visually on the meter at all times and audibly when desired.
White's Iron I.D Probability System does not alter the depth detection of the GMT.
The GMT also retains the Variable SAT feature so popular with gold prospectors. By adjusting the
speed of the SAT (self adjusting threshold) the user can minimize the affects of fast changing
ground mineralization. This feature has long been an exclusive feature of White's Goldmasters.
Audio Signal Boost, engineers call this feature E.P.S. (Enhanced Signal Penetration), is retained
from previous Goldmasters and provides audio amplification (gain). Signal Boost will give a
louder signal on those very tiny or deep targets when needed in certain operating conditions.
The GMT is designed for use with the new 101/2" elliptical Twin-D searchcoil,which it is shipped
with. However, it is electrically compatible with all other Goldmaster searchcoils. The GMT
operates slightly below the operating frequency of previous Goldmaster models, so it can be used
near those older models with minimal "crosstalk". In addition, the GMT has added a unique
touch pad controlled "Grab" feature, which instantly achieves ground balance. This and a "follow
the gold" feature will be described in the manual.
All this adds up to a great detector for doing what we all love best, finding gold!
Good Luck and Good Prospecting!
Jimmy "Sierra" Normandi