Lowrance electronic X-55A SONAR User Manual


 
RANGE
-
Automatic
When turned on for
the first
time,
the X-55A
automatically places
the
bottom
signal
in the lower half
of the screen. This is called Auto
Ranging
and is
part
of the
automatic function. The
range
cannot be
changed
manually
while the unit
is in automatic.
RANGE
-
Manual
The X-55A
gives you
control overthe
range
when it's in the manual mode.
To
change
the
range,
first make certain the X-55A
is in the manual mode.
Next, press
the RANGE
key.
The
range adjustment
menu
appears
in the
lower
right
corner of the
display.
Press the
up
or down arrow
keys
to
decreaseorincrease
the
range.
__________________________________
10, 20, 30, 40, 60, 100, 150, ___________________________
The available
ranges
are
0-5,
200, 300, 500,
800,
and 1000
feet. After the
desired
range
is
displayed, press
the CLEAR
key
to erase the
range
menu. \CHANGE
UPPER LIMIT
I
29
NOTE: The
depth
capability
of
______
the X-55A
depends
on the
___________
transducer
installation,
water
and bottom
conditions,
and
_________________
other factors.
One of the best
ways
to
get
fish arches
is to
expand
or "zoom"
a
segment
ofthewater.
Forexample,
from
45to 60 feet. The smallerthe
segment,
the
betterthescreen resolution will be. The
easiestwayto
do this on the X-55A
iswiththe Zoomfeature. Thisfeature
expandsthe
echoes,
making
it
easier
to see detail. Forthe best
results,
turn the
sensitivity up
as
high
as
possible
without
getting
too much noise on the screen.
In mediumto
deepwater,
this
method
should work to
display
fish
arches.
If
you
see fish
signals
wheic the unit is in the
manual
mode,
but don't
get
fish
symbols
when the Fish l.D. feature
is
on,
try
increasing
the
sensitivity.
SIGNAL
INTERPRETATION
Your X-55A
gives
an accurate
picture
of the bottom that
your
boat
is
passing.
A bottom of firm
sand,
gravel,
shell,
or hard
clay
returns a
fairly
wide
signal.
If the automatic mode is off and the
signal
narrows
down,
then
it
means
thatyou
have moved over a mud
bottom. Mud absorbs the sound
wave
and returns a weak
signal.
Turn
up
the
sensitivity
to see a better
bottom
signal.
RANGE
-
Upper
and Lower Limits
The X-55A lets
you
change
the
upper
and lower
range
limits when it's
in
the manual
mode. This lets
you
"zoom" in on
segments
of the water as
small as 5 feet.
In other
words, you
can set the
upper
limit to 30 feet
and
the lower limit to 35
feet, regardless
of the bottom
depth.
This in
essence,
givesyou
a Sfootzoom.
You can choose
anysegment
of
thewater,
as
long
as the distance between the
upper
limit and lower limit is 5 feet
(2
meters,
1
fathom)
or more.
Using
the zoom feature
(described
in the next
section)
Ietsyou
view a
segmentof
thewateron
the screen's
rightside (forexample,
from 20 to 30
feet),
and a zoom of that
segment
on the left.
To
change
the
upper
or lower
limit,
first make certain the unit is in the
manual mode.
Next,
press
the RANGE
key.
The menu shown
above
appears.
Now
press
the
key
nexttothe "CHANGE UPPER LIMIT" label
to
change
the
upper
limit
or "CHANGE LOWER LIMIT" label to
change
the
lower limit. We're
changing
the
upper
limit in this
example.
After
pressing
the
key
next to the
"CHANGE UPPER LIMIT"
label,
the screen shown
at
the
top
of the next
page appears.
BOATS DIRECTION OF
TRAVEL
4.
p
A
B C
(CHiNGE
LOWER
LIMIT
I
___
___
48
i0
EHAL
150
38
15
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