- 5 -
Audio
Output
Selection
All
GA
‐
72Cds
are
shipped
from
the
factory
with
the
Audio
Output
Switch
set
to
“B”
;
this
setting
provides
an
audio
signal
that
is
always
present.
If
you
prefer
to
not
hear
a
signal
until
the
locator
is
within
detection
range
of
a
target,
set
the
switch
to
“A”
.
Audio
Signal
with
Output
Switch
set
to
“A”
No
audio
signal
is
heard
until
the
GA
‐
72Cd
comes
within
detection
range
of
a
ferromagnetic
object.
The
locator
will
increase
in
volume
over
the
object.
It
will
decreases
in
volume
and
turn
off
when
the
locator
is
moved
out
of
range.
NOTE:
If
you
put
the
GA
‐
72Cd
down
without
turning
the
Sensitivity/Power
switch
to
Off,
the
“power
‐
on
monitoring
feature”
(designed
to
conserve
battery
life)
will
initiate
a
beeping
audio
‐
alert
signal
after
15
seconds.
Audio
Signal
with
Audio
Output
Switch
set
to
“B”
As
you
move
the
GA
‐
72Cd
across
a
ferromagnetic
object,
the
40
Hz
idling
signal,
which
is
always
present,
increases
in
frequency,
peaks
when
the
locator
is
directly
over
the
object
and
then
decreases
to
40
Hz.
Regardless
of
which
switch
setting,
the
indication
of
signal
strength
and
the
polarity
on
the
meter
will
always
peak
(positive
or
negative)
when
the
locator
is
directly
over
a
ferromagnetic
object.
As
shown
in
Figure
4,
the
cover
must
be
removed
to
change
the
setting
of
the
Audio
Output
Switch.
B
A
Figure
4:
Location
of
Audio
Output
Switch
