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GLOSSARY
ANCHOR WATCH
-
A
selling
of the sonar unit's
alarm. The alarm activates
when the boat drifts
into shallower or
deeper
water than the alarm set
points.
BACKLIGHTEDAdisplayorkeyboardillUminatedfrombehitX1
byalight.
Back-lighted displays
and
keyboards
are essential
when
night fishing
or
navigating.
CAVITATION
-Air bubbles created
bythe high speed
movement of a boat
or
transducer
through
water.
CHART SPEED
-(1)
The
speed
of the chart
paper
on
a
paper
graph
recorder.
(2)
The
speed
of an
image
across the screen of a
liquid crystal
graph. (Also
called
"scroll
speed").
CONE ANGLE
-Width of the transducer's cone
of sound. Lowrance
has
transducerswith
coneanglesfrom 8to45degreesto
suitthevarying
needs
of fishermen.
CRT
-
Abbreviation for Cathode
Ray
Tube.
See Video
Graph.
DEFINITION
-
The
ability
of a sonar unit's
display
to show detail. A
high
resolution
display
can show
more detail
than a low resolution one.
DISCRIMINATION
-
A feature
thatallows the sonar to eliminate
noise and
display onlytrue target
information.
Discrimination on
Lowrance
products
cuts out false
signals
from other sonar, noise, thermoclines,
and more.
FISH ALARM
-
An alarm that activates
when a fish is detected.
FISH ARCH
-
A sonar with
good
resolution
displays
fish
signals
with an
upsidedown
"V" orarch. This
distinguishesfish
signalsfrom
othertargets.
FLUSH MOUNT
-
A
transom mount transducer
that is installed
with the
bottom of the
transducer flush with the bottom
of the hull.
GIMBAL BRACKET
-
A bracket
used to install
a sonar unit
permanently.
The sonar unit can rotate
in the bracket for the best
viewing angle.
GRAYLINE -Thisfunction shows
the relative
strength
of
signals displayed
NOISE
Minimize electrical noise
by
routing
the
power
cable
away
from
other
possible
sources
of electrical interference. One of
the
largest
noise
generators
is the
engine's wiring
harness that runs
from the
engine
to the
instrument
panel.
This
harness
usually
contains awirefor the
tachometer
which radiates HF
(radio
frequency) energy.
For best
results, keep
the
power
and transducer cables
away
from the
engine wiring.
Also, bilge
pump
wiring
can sometimes radiate
noise so
try
to
keep
the X-40's cables
away
from those wires.
VHF radio antenna cables radiate
RF
energy
at
higher power
levels
than even
the
engine's wiring
harness.
It
is
important
to
keep
the X-40's
power
and transducer cables as far
away
as
possible
from VHF radio
cables.
If interference
begins
at slow boat
speeds, worsening
as the boat
speed
increases,
then a
probable
cause is acoustic noise,
or cavitation.
This noise is
not
electrical,
but rather
mechanically
induced noise from
the transducer.
Stop
the
boat,
put
the
engine
in
neutral,
and increase the
rpm.
If the noise
does not increase on the
display,
then
it is cavitation.
Usually,
air bubbles
passing
overtheface of thetransducer
createacoustic
noise. Thefasteraboattravets,
the moreair bubbles increaseand
generate
noise on the
display.
To eliminate
this
problem,
read
the transducer
owner's manual for
proper
mounting techniques.
TRANSDUCER
Installation
instructions for the transducer are
with the transducer
in a
separate package.
Please
read the instructions
carefully
before
you
install the transducer.
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