- 7 -
APPLICATION
NOTES
Basic
Signal
Patterns
Audio
signal
peaks
Audio
signal
peaks
over
each
end
directly
over
vertical
of
a
horizontal
target.
Visual
indications
targets.
Visual
indications
peak
positive
over
one
end
also
peak
as
either
and
negative
over
the
other
end.
polarity.
+
or
‐
+
‐
Figure
7:
Signals
from
Vertical
and
Horizontal
Targets
After
you
have
detected
the
presence
of
a
target,
hold
the
locator
vertically
and
slowly
move
it
back
and
forth
in
an
“X”
pattern
while
observing
the
digital
readout.
The
value
of
the
number
will
be
highest
when
the
locator
is
directly
over
a
vertical
target
or
over
the
ends
of
a
horizontal
target.
The
“X”
pattern,
as
shown
in
Figure
8,
is
ideal
for
pinpointing
small
objects.
By
using
this
technique,
a
1
‐
1/4
inch
PK
nail
buried
up
to
8
inches
can
be
precisely
located.
Figure
8:
“X”
Pattern
provides
Precision
Locating
If
you
are
looking
for
a
corner
marker
and
detect
two
more
signals
in
the
same
general
area,
raise
the
locator
several
inches
above
the
ground
or
reduce
the
sensitivity
setting.
Any
signal
that
disappears
when
the
locator
is
held
higher
or
when
the
sensitivity
is
decreased
is
probably
coming
from
a
shallow
target.
As
shown
in
Figure
9,
the
signal
from
a
rusty
bolt
or
other
small
item
decreases
much
faster
with
distance
than
the
signal
from
a
larger
target,
such
as
a
18
‐
inch
length
of
3/4
rebar
that
can
be
located
at
depths
up
to
7
feet.
