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TARGET DISPLAY and AUDIO
SIGNAL Indicator
The lower-left bargraph designates
SIGNAL strength only when operating in
Discrimination mode.
The signal strength indicator at the bottom-
left of the screen indicates how large or
close the buried metal target is.
If all bars are illuminated, the target is
large or close to the searchcoil.
If one or two bars are illuminated, the
target is far away or small, or both.
DEPTH Indicator
When operating in Discrimination mode, a
target's location and size can be verified
using the PINPOINT control.
Press PinPoint to temporarily detect metal
without
searchcoil
monotone hum.
While holding the PinPoint button, the
DEPTH indicator will appear.
number beneath DEPTH represents the
distance of the object, in inches, from the
searchcoil. The Depth scale is calibrated
to coin-sized objects. For objects other
than a coin, the numeric value is a relative
measure of the target's depth.
AUDIO FEEDBACK
When a target is detected, the Gold Bug will
respond with two types of sound:
1. VCO, or
Oscillator, is an audio response
with variable pitch and volume.
2. LOW or HIGH tone beeps.
In Discrimination mode, targets which fall
into the zone along the arc whose
segments are shaded will be identified
with a LOW tone beep and solid segments
with a HIGH tone.
As the user sets the discrimination level
+
-
with the
and
buttons, he is determining
which targets will induce the low tone, and
which will be eliminated.
All targets' audio responses in All-Metal
mode will be VCO.
VCO, or Voltage Controlled Oscillator, is
an audio response which provides a good
feel for the target.
26
motion,
and
Voltage Controlled
The stronger the target signal, the higher
the volume and the higher the audio pitch.
Very weak signals will have the faintest
volume and lowest pitch.
For this reason, the use of headphones
is always recommended for detecting the
smaller and deeper targets.
2-DIGIT TARGET INDICATOR
In Discrimination mode the 2-digit target
indicator, in the middle of the screen,
provides a specific target value to help
identify buried targets more accurately.
With practice in the field, you will learn to
associate target values with the probable
identification of buried objects. The target
value can vary each time the searchcoil
a
passes over the target, depending upon
the orientation of the object and its
distance from the searchcoil.
The
As a starting point, refer to the table below.
T
A
T
A
The table below lists some common
approximate
experience in the field, you will
recognize
objects by their numeric value.
O
B
J
E
C
T
O
B
J
E
C
T
foil from gum wrapper
U.S. nickel (5¢ coin)
aluminum pull-tab
aluminum screwcap
zinc penny (dated after 1982) typically 78
aluminum soda pop can
copper penny, clad dime
U.S. quarter (25¢ coin), clad
50¢ coin, modern clad
old silver dollar coin
US silver Eagle $1 coin
Caution:
visual references. Many other types of
metal can also be represented by a given
target I.D.
R
G
E
T
R
e
a
d
R
G
E
T
R
e
a
d
target
values.
many
types
The target indications are
o
u
t
o
u
t
With
of
metal
T
A
R
G
E
T
I
.
D
.
T
A
R
G
E
T
I
.
D
.
47 - 48
typically 58
60 - 75
70 - 80
75 - 85
typically 83
typically 85
typically 87
typically 89
typically 91
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