Lowrance electronic X-55A SONAR User Manual


 
Using
the numbered
keys,
enter a numberforthe
upper
Iimitthat is at
least
_________
ZOOM
Enlarging or"zooming"the picture
is a common methpd usedto show small
detail and fish
signals.
The X-55A
gives you
two different zoom
sizes, plus
a
splitscreen
zoom
option.
The
zoom
operation
and
adjustment
is different
in the automatic and manual
modes.
ZOOM
-
AUTOMATIC
MODE
To zoom the
display
in
the automatic
mode,
first
press
the ZOOM
key.
All
targets
on the
display
are
enlarged
four times normal size
automatically.
The menus
shown below also
appear.
Turn the zoom feature
on
(oroff) by pressing
the
key adjacentto
the "OFF!
ON" label.
Pressing
the
key adjacentto
the "2X14X" label
enlarges
echoes
from two times
to four times their normal size.
To switch between
the
split
screen zoom and full screen
zoom,
press
the
key adjacent
to the "SPLIT/FULL"
label. The
screen
instantly splits
into two
sections as shown at the
top
of
the next
page. Alltargets
on the
left side of the screen are shown
at four times the size of the
ones on the
right.
If
you
switch
to the 2X zoom
mode,
echoes
on the left side of the screen are
FISH ARCHES
Fish arches are created
when the cone of sound
passes
over a fish. The
distance to a fish when the cone first strikes it is shown as "A" on the next
page.
When the center of
the cone strikes the
fish,
the distance is shorter
as shown "B". As
the cone leaves the
fish,
the distance increases
again
as
shown in
Very
small fish
probably
will
not arch at all. Medium sized fish will show a
partial arch,
ora
shape
similarto an
arch if
they're
in
deep
water.
Largefish
will
arch,
but turn the
sensitivity up
in
deeper
water to see the arch.
Because of water
conditions,
such as
heavy
surface
clutter, thermoclines,
etc.,
the
sensitivity
sometimes cannot be increased
enough
to
get
fish
arches.
five feet less than the
lower limit. In this
case,
we entered
40,
giving
a 20
footzoom. When
you've
enteredthe desired
upper limit, pressthe
up
arrow
key
at the bottom of
the screen.
________
______________________
The unit returns
to the sonar
qg 3
screen with the new
upper
limit.
0
Changethe
lowerlimitthesame
way.
Usingtheupperand
lower
limits in this
manner lets
you
expand
a
segment
of
water
quickly
and
easily.
1
ENUMBERKEYSTO
USE RIGHT ARROW
TO BACKSPACE.
L
___
•12
29
36
q8
60
20
degree
TRANSDUCER CONE ANGLES
8
degree
16
37
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