Specifications

MENU #3-Sec
(SURFACE
CLARITY
CONTROL)
The
markings
—or
noise--at
the
top
of the
display
can extend
many
feet
below the
surface. This
interferes with fish
signals
and other
targets.
These
markings
are Sur-
face
Clutter and are
caused
by
wave
action,
boat
wakes, bait
fish,
temperature inversions, and other
reasons.
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MENU #4
-
DIGITAL
This menu turns the
digital
depth display
off and on.
When the
Z-7200 Is turned
on,
the
digital
dis-
play
is on. To turn it
off, press
both
arrow
keys
in the RANGE
section at
the same time. Then
press
the
up
arrow
key
until
menu #4
appears.
Use thearrow
keys
in
the ALARM
section to turn the
digital
off or on.
Press the AUTO
key
to activate
your
selection.
MENU
#5
-
DIGITAL
AVERAGE
The
digital
sonar
used in
the
Z-7200 Is a
highly
sensitive de-
vice
that
gives rapid updates
of the
water's
depth.
Under
most condi-
tions,
the bottom contour
changes
so
quick
that the
display
appears
to
"jitter".
In other
words,
the
display
will
change
so
quickly
that it
can be
difficult to determine the
actual bot-
tom
depth.
To minimize
this condi-
tion,
the Z-7200
averages
the bot-
tom
readings
between
narrow
para-
meters and
displays
the result.
When the Z-7200 Is
first turned
on,
averaging
is enabled.
To turn it
off,
select menu #8
by
pressing
both
arrow
keys
In the
RANGE section at
the same time.
Then
press
the
up
or
down arrow
keys
in the
RANGE
section until
menu 8
displays.
Next
press
the
up
or down arrows in
the
ALARM section
of the
keyboard
to
turn
averaging
on or off. Wait sev-
eral seconds for
the menu to
disap-
pear
or
press
the AUTO
key
to acti-
vate
your
selection.
19
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—
H
Use
Surface
Clarity
Control
(8CC)
to
reduce or
eliminate sur-
face
clutter. 8CC varies
the
gain
of
the receiver
between each
transmit
pulse,
while the receiver
is "listen-
ing"
forthe return
echoes. The
gain
is the
lowest for echoes
near the
surface.
It
gradually
increases as
the
depth
increases.
The maximum
depth
that
8CC will affect
is three
quarters
of the
selected
depth
range.
For
example,
with
maximum
SCC,
on a 0
to 60 foot
range,
8CC
would have an
effect from the
surface to 45 feet.
8CC
has ten levels
of
adjustment. Turning
the Z-7200 on auto-
matically
sets 8CC to level 1.
To
change
to a
different
level,
press
both
arrow
keys
Inthe RANGE
section atthe same
time,
then
press
the
up
arrow
key
until the
8CC menu
appears.
Then
press
the arrow
keys
in the
ALARM
section forthe desired 8CC
level. Then
press
the AUTO
key
to
activate the
new 8CC
level.
r—L
18
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