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SURFACE
CLUTTER
Algae,
plankton,
air
bubbles,
boat
wakes,
and schools of bait fish
near the
surface of the water
can create
large
surface echoes
on the
paper.
These echoes can extend
far
down the
paper
and
interfere with
fish or
other
target
echoes.
Lowrance
has a
special
feature
called
"Surface
Clarity
Control" or
"5CC"
that combats surface
clutter
effectively.
THERMOCLINE
Junction of dif-
ferent
temperature
layers.
When
the warm and
cool
temperature
layers meet,
a
discontinuity
in the
water is formed that
reflects sonar
signals.
This is
called a thermo-
dine.
TRANSDUCER The "antenna"
of
a sonar unit.
This contains a small.
crystal
that
converts the electrical
energy
from
the transducer into
sound
energy
and
sends it into
the water. It then
converts
any
sound in its
frequency range
back
into electrical
pulses
for the
receiver. Transducers
have a van-
ety
of
styles
including
"Thru-Hull"
which bolt thru a hole
drilled in the
hull,
"Shoot-Thru-Hull"
—
epoxied
directly
to
the inside of a
solid
fiberglass
hull with no holes
required,
and "Transom
Mount"
—
bolts
directly
to the transom of
the
hull,
either
below or flush with the
bottom of
the boat.
TRANSPORT
ASSEMBLY The
mechanism that
holds and
pulls
the
chart
paper
from the full
paper
roll,
past
the
stylus,
and rolls it
up
on
the
takeup
side. It
also con-
tains the
paper
drive
motor and
gear
train.
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Specifications 1
Introduction
How it Works
Installation
Power Connections
Transducer Selection
Basic
Operation
Sensitivity
Control
Clear
Entry
Discrimination
Paper
Speed
GRAYLINE
Range
Lower Limit
Upper
Limit
Lines
Marker
Scale
Memory/Reset
Feet, Fathoms,
Meters
End Of
Paper
Zero
Adjust
How To Read
Graphs
Paper Loading
Stylus Replacement 16
Stylus
Belt
Replacement 17
Maintenance
17
Troubleshooting 18
ADVANCED OPERATION
18
Surface
Clarity
Control
(SCC) 18
Suppressor
19
ACCESSORIES
LDT-3000
DIGITAL
SURFACE
TEMP
Allows instant visual
wading
of
surface water
temperatures
horn
32.0 Ia 99.9
degrees
F
Includes
heavy
28 foot sensor cable.
DUST COVER
Extra
protection lrom the elements.
LSB-200A SWITCH
BOX
Allows use ci two
different transducers with
one sonar unit.
Weetharpreof switch
activates transducer
#1
or
#2.
LSB-201A SWITCH BOX
Allows use ci Iwo soners with
only
one
transducer.
Weetherprool
switch activates
sonar
#1 or #2.
LXT-11OA TRANSDUCER
EXTENSION CABLE
Ten-fool extension cable far use where a
transducer must
be located
beyond
the
reach
oh the
standard transducer cable.
Sonar unit does not nead
returning
when
only
one extension
is used.
LKB-2000 TRANSDUCER KICK-UP
BRACKET
Allows THS 1192-20 io be mounted below the
hull on
aluminum beets to avoid hull turbulence.
LTB-1
000 TRANSOM
MOUNTING BRACKET
Transom
mounting
brscket end
spet specifically
designed
for use
with V-bottomed
boats. Uses
any
Lowrance
plastic
bolt-thru-huil
transducer.
LFF-1 02
FISH-N-FLOAT
Two
highly vjaibie floats with 100-fool
nylon
cord, wraparound
lead
sinkers.
LTP-100 FISH-N-TEMP
Portable
temperature
and
depth
indicator
far accurate
readings
from
30-90
degrees
F
end
depths
to 00 teal.
LPG-605 CHART PAPER
Straight
line chart
paper,
50 toot
roll,
br all
Computer
Sonar
graph
recorders.
LTC-60 TRANSDUCER
CONNECTOR KIT
Replacas
old
slyle
transducer connecter
with new
plastic style.
Or to
repair
a
damaged transducer cable.
LPB-192
POWER BOOSTER
Increases the
outpul power
of the X-150 to
extend the
depth range,
better noise
rejection,
and
increases the
ability
to
diaptey
small detail.
LDT-4000
DIGITAL SURFACE TEMP
New sensor
probe
allows
transom, thru-hut,
or raw water intake
mounting
Water
temperature readings
trorn 32.0 099.9
degrees
F
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