a 60 foot range has zero for the
upper
limit and 60 for the
lower limit. INTRODUCTION
REMOTE -
An Intelligent "repeater"
unit that receives depth information
from another sonar unit. A remote doesn't have a transmitter or receiver.
However, it does have ft's own features that are adjustable and operate
separately
from the master.
RESOLUTION -
The
ability
of a sonar unit to separate targets
from each
other or the bottom.
RMS -
A standard rating of transmitter power output.
SCALE -
The
markings on a sonar unit's
display. To determine the
depth
ofatarget, simply compare
the
target's
location to
the location of the scale
markers on the
display.
SECOND ECHO -Another echo that registers at
roughlytwice
the
depth
of a target echo. This is caused by the sound waves reflecting off the
bottom, strikingthe
surface of
thewater,
travellingtothe
bottom
again,
and
returing to the surface.
SECOND FUNCTION KEY
-
A button that converts the functions
of the
primary keys
on the
keyboard. Sonar unitswith a second function
key
have
other
keys
with two functions. You can switch functions
with the second
function
key.
SENSITIVITY -
The ability of a sonar unit's receiver to display targets.
lncreasingthe sensitivity
allows
weakertargets to be
displayed. Also called
"gain".
SCROLL SPEED -
See CHART
SPEED.
SHOOT-THROUGH-HULL - A transducer installation which allows the
sonar signals
to pass through
a fiberglass hull without
cutting
a hole In the
hull.
SUPPRESSION
-
A method used in some sonar unftsto
eliminate interfer-
ence or noise.
SURFACE CLARITY CONTROL- Reduces or eliminates undesirable sig-
nals displayed near the water's surface. Also called "SCC".
THERMOCLINE -Alayerofwatercaused bythe meeting
of warm
and cool
layers
of water. Thethermocline providesthetemperature mostfish
prefer.
Welcome to the world of
sportfishlng
sonar. Your Lowrance X-40
is a
high quality sonardesigned for both professional
and novice users. The
X-40
automatically
finds and
displays
the bottom
depth,
fish, and structure
by
just
by turning
it on. As
you become familiar with your X-40,
try some
of its remarkable features. "Fine tune" the unit to the surrounding
conditions
to get
the most from
your
sonar.
You can program
the X-40 to sound alarms when the boat goes
shallower or
deeper
than a
preset depth.
An alarm will also sound
when a
fish enters an alarm zone. Zoom in and separate fish from structure and
each other.
Only
Lowrance gives you the
power to adjust
a sonar unit to its
maximum potential.
TogetstartedwithyourX-40,first
readthe installationsection. This
is where it all begins,
and improper installation can cause
problems
down
the road. After
you've
read these instructions and installed
your
X-40,
read
the rest of this manual in detail. The more you know when
you get
to the
water, the more
your
X-40 will do for
you. Take this
manual for reference
when
you head to the lake.
INSTALLATION
Mounting
Install the X-40 in any convenient location, provided there is
clearance when tilted for the best
viewing angle. Holes in the bracket base
allow wood screw or through bolt mounting. Attach the bracket to
aluminum panelswith sheet metal screws. Place a
piece
of
plywood onthe
back of thin fiberglass panels to secure the mounting
hardware. Make
certain there is enough room behind the unit to attach the power
and
transducer cables.
You can route the
power
and transducer cables
through
the
7/B"
hole in the base of the
gimbal bracket. Then
pass
them
through
a hole in
the mounting
surface. The smallest hole
that will pass
one connector
through
is
3/4". Pass the transducer connector and
cable
up
through
the
hole and
gimbal
bracket. Then push the power
cable wire down
through
the bracket and dash. After
routing the cables, fill the hole with silicone
rubberadhesive (RTV).
Offset the bracketto coverthe
majority
of
the hole.
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