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Lowrance X-55A Manual

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75% of the selected
depth range.
For
example,
on a
0-60 foot
range
with The
microcomputer
is
sophisticated,
but it can be fooled. It cannot
maximum
5CC,
surface clutter will be
reduced down to 45 feet.
There are three levels of 5CC available on the X-55A:
low, medium,
and
high.
When it's turned on forthe first
time,
the 8CC level is
low.
To
change
it,
press
the MENU
key
five
times,
then
press
the
key
adjacent
to the
"ADJUST CHART SURFACE CLARITY" label until the
black box is on the
desired SCC level.
Press the
key
next to the 'EXIT' label when
you're
finished.
ASP
(Advanced Signal Processing)
The ASP feature is a noise
rejection system
built into the X-55A that
constantly
evaluates the effects of boat
speed,
water
conditions,
and
interference.
This automatic feature
gives you
the best
display possible
under most conditions.
The ASP feature is an effective
tool in
combating
noise. In so-
nar
terms,
noise is
any
undes-
ired
signal.
It is caused
byelec-
trical
and mechanical sources
such as
bilge pumps, engine
ignition.systems
and
wiring,
air
bubbles
passing
over the face
of the
transducer,
even vibra-
tion from the
engine.
In
all
cases,
noise can
produce
un-
wanted marks on the
display.
HART
SURFACE CLfRITY
nTLEuEr
OF CHART ASP
narnI
i-'iew_____
'AtM
The ASP feature has two levels
-
Normal and
High.
If
you
have
high
noise
levels,
try using
the
"High"
ASP
setting.
However,
if
you
are
having
trouble
with
noise,
we
suggest
that
you
take
steps
to find the interference
source
and fix
it,
rather than
continually using
the unit with the
high
ASP
setting.
However,
there are times when
you may
want to
turn the ASP feature off.
This allows
you
to view all
incoming
echoes before
they
are
processed by
the ASP feature.
To
change
the ASP
level,
press
the MENU
key
five times.
Then
press
the
key
next to the
"ADJUST LEVEL OF CHART ASP" label until the desired
level is obtained.
distinguish
between fish and other
suspended objects
such as
trotlines,
turtles, submerged
floats,
air
bubbles,
etc. Individual tree limbs
extending
outwards
from a
group
of limbs isthe hardest
objectforthe
Fish l.D. feature
to
distinguish
fromfish. You
maysee
Fish l.D.
symbols
on the screen when
actually,
there are no fish. Practice with the unit in both the Fish l.D. mode
and without to become more familiar with the Fish l.D. feature.
To turn the Fish I.D. feature
on, press
the menu
key,
then
press
the
key
adjacent
to the "Fish-ID On Off FishTrack" label until the black box
surrounds the "ON" label. Echoes will continue
to scroll across the
screen,
however,
the surface clutter at the
top
will no
longer
be
displayed. Any
targets
the
microcomputer
determines are
fish will be
displayed
as fish
symbols.
To turn the Fish l.D. feature off
again,
first
press
the menu
key.
Next,
press
the
key adjacent
to the "Fish-ID
On Off FishTrack" label until
the black box surrounds the "OFF" label. The
menu
immediately
disap-
pears
and the sonar screen returns.
Remember,
the Fish l.D. feature can't be used when the X-55A is in the
manual mode. If
you
turn the Fish l.D. feature on when the X-55A is in
manual,
the
microcomputer
will turn the automatic feature on.
If
you
turn
automatic off when the Fish I.D. feature is
on,
the Fish l.D. feature will be
turned
off also.
FISHTRACKTM
The FishTrack feature shows the
depth
of a fish
symbol
when it
appears
on the
display.
This lets
you accurately gauge
the
depth
of
targets.
This
feature is available
only
when the Fish ID feature is on.
To turn the FishTrack feature
on,
press
the menu
key,
then
press
the
key
adjacent
to the "Fish-ID On Off Fishlracl?' label until the black box
surrounds the "FishTrack" label. Echoes will continue to
scroll across the
screen,
with the
depth
of fish
symbols showing
above them
as
they appear
on the
display.
To turn the FishTrack feature
off
again,
first
press
the menu
key.
Next,
press
the
key adja-
cent to the "Fish-ID On Off
FishTrack" label until the black
box surrounds the "ON" label
to
leave Fish ID on or the "OFF"
label to turn both Fish ID and
FishTrack off.
30
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