GMT Super Pulse
Owner’s Manu
al
GMT Super Pulse
Ow
ner’s Manual
QuickStar
t
1.
Set the
Ground
Ba
la
nce
to ~8.5.
2.
T
urn on the power and adjust the
Gain
to “2.”
3.
Adjust the
Thre
s
hold
to achieve a faint background hum.
4.
W
ith the coil on the ground
(no motion) increase the
Ga
in
until the audio begins to chatte
r. B
ac
k o
ff
s
li
ghtly for a rea-
sonably smooth threshold.
5.
Using a spot free of tar
get
s, bob the coil up & down and
adjust the
Groun
d Balan
c
e
control to minimize the audio
response.
6.
The
GMT Super Pulse
has a two-tone response: low con-
ductors (small gold nuggets, fo
il) give a high tone, high
conductors (lar
ge gold nuggets, silver coins) give a low
tone.
response at GB=5 (see
Mor
e Inf
o
for audio responses).
Occasionally there
is not enough minera
lization to require
ground balancing (e.g. non-mineralized beaches), and
Grou
nd
Balance
may be turned of
f. This disables the ground balance
an
d
GMT Super Pulse
will run as a strai
ght PI detector
. This
gives a slight improvement in de
pth but, of course, will respond
to mineralization and eliminates
the ability to discern conduc-
tivities as all tar
gets will produce a high tone.
Frequency
This contr
ol makes
s
m
all ad
just-
ments
to
the
transmitter
pulse rate. This
is used to counteract any interference
which might be due to outside electro-
magnetic sources, such as radio sta-
tions, microwave, s
hort wave, electric
fences, power lines, lightening, electri-
cal storms, or other metal dete
ctors being used nearby
. This
interference is recognized by a wa
rbling or repetitive pulsing of
the audio threshold, and can mask tar
get signals.
If you are experiencing in
terference, adjust the
Fre
q
ue
n
cy
control for minimal chatter
.
Adjustments should be done in
small steps, with a few seconds
between each adjustment to see
if the unit settles down. If you
cannot deal with interference
with the
Fre
q
ue
n
cy
control, then reduce the
Ga
in
and/or
Thr
esh-
old
settings to obtain a reasona
bly stable operating point..
More Info
Audio
W
ith
Gro
und Bala
nce
=
Off
all tar
gets will
give a high audio
tone. W
ith
Grou
nd Bala
nce
enabled, low conductivity tar
gets
give a high tone a hi
gh conductivity tar
gets give a low tone.
New users are encouraged to pr
actice with various tar
gets
to
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