GMT Super Pulse
Owner’s Manual
GMT Super Pulse
Owner’s Manual
QuickStart
1. Set the Ground Balance to ~8.5.
2. Turn on the power and adjust the Gain to “2.”
3. Adjust the Threshold to achieve a faint background hum.
4. With the coil on the ground (no motion) increase the Gain
until the audio begins to chatter. Back off slightly for a rea-
sonably smooth threshold.
5. Using a spot free of targets, bob the coil up & down and
adjust the Ground Balance control to minimize the audio
response.
6. The GMT Super Pulse has a two-tone response: low con-
ductors (small gold nuggets, foil) give a high tone, high
conductors (large gold nuggets, silver coins) give a low
tone.
response at GB=5 (see More Info for audio responses).
Occasionally there is not enough mineralization to require
ground balancing (e.g. non-mineralized beaches), and Ground
Balance
may be turned off. This disables the ground balance
and GMT Super Pulse will run as a straight PI detector. This
gives a slight improvement in depth but, of course, will respond
to mineralization and eliminates the ability to discern conduc-
tivities as all targets will produce a high tone.
Frequency
This control makes small adjust-
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, short wave, electric
fences, power lines, lightening, electri-
cal storms, or other metal detectors being used nearby. This
interference is recognized by a warbling or repetitive pulsing of
the audio threshold, and can mask target signals.
If you are experiencing interference, adjust the Frequency
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 Frequency control, then reduce the Gain and/or Thresh-
old
settings to obtain a reasonably stable operating point..
More Info
Audio
With
Ground Balance = Off all targets will give a high audio
tone. With
Ground Balance enabled, low conductivity targets
give a high tone a high conductivity targets give a low tone.
New users are encouraged to practice with various targets to
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