Specifications

a
AUTO
SENSITIVITY OPERATION
When the Z-7200 is in
the automatic
mode,
the receiver's
sensitiv-
ity
automatically adjusts
to the
surrounding
conditions. The
micro-
computer places
it at a level
slightly
above
the minimum
required
to
pick
up
the
bottom
signal.
Changing
the
sensitivity
level
while the Z-7200 is in the automatic
mode
is
possible.
This
may
be desirable
if the
sensitivity
level is not
enough
to show fish or other
small detail. The Z-7200
will increase the
sensitivity
to
pick up
the bottom
signal,
then add
in the level
you programmed.
If
desired,
you
can
add
sensitivity up
to the
maximum.
Toadjustthe
sensitivitywhilethe
Z-7200
is in the automatic
mode,
simply press
either the
right
arrow
key>
to increase
it. Press the left arrow
key
c to decrease the
sensitivity.
If the value
goes
below
the minimum
required
to
keep
the bottom
signal,
the Z-7200's audible
tone will sound an
alert. The same is true if
you try
to
go
above the maximum level.
As
you
press
the arrow
key,
the
sensitivity
bar
will move
right
or
left, according
to
the
sensitivity
level chosen.
28
9
Brush
usually
lies on the bottom and shows
up
as
clumps
rising
above the bottom
signal.
Brush
signals
look similar
to
large
rocks,
however their
signal
is not
as
strong
as rock.
FISH SIGNALS
The
signals displayed
on the Z-7200
by
fish
are Identified
by
various
shaped markings
In certain
patterns,
as
opposed
to
random marks
created
by
noise. Or the
solid,
continuous
markings
made
by
the bottom.
Typically,
fish are identified
by
a characteristic arch that
separates
them
from their
stationary
surroundings.
The reason for
this Is shown
below.
The distance to a fish when
it moves into the sonar's cone of
sound
is shown
as "A" below. When the fish has
moved into the center
of the
cone,
the distance
to itwill be
shorter,
"B". As it moves out of the
cone,
the
distance
will increase
again
as shown in "C".
2
4
di
a
69'
SENSITIVITY: TOO LITrLE
SENSITIVITY:
ADJUSTED PROPERLY
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