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KEYBOARD
BASICS
This section
gives
a brief
explanation
of the
keyboard.
Read the
Operation
section for a detailed
description
of each
key's operation.
ON OFF
L J
These
keys
turn the unit's
power
on and off. To turn it
on,
simply press
the ON
key.
To turn it
off,
press
the OFF
key.
[J
Pressing any key generates
a tone or
"beep."
This tells
you
________ that the unit has
accepted
a command.
UP
and
DOWN ARROWS
These
keys
are used to
adjust virtually every
feature and
_________ function on
the unit. Use
these
keys
to
adjust
the
sensitivity,
chart
speed, range,
zoom and chart alarm.
Operating
Current 200 ma
(lights off)
500 ma
(lights on)
Operating Voltage
9-15 vdc
Number of
pixels
50 x 27
(vertical
x
horizontal)
1350 Total
GLOSSARY
.5"
per
minute
(minimum)
32"
per
minute
(maximum)
180 feet
400 feet
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.
BACK-LIGHTED
-
A
display
or
keyboard
illuminated from behind
by
a
light. Back-lighted displays
are essential when
night fishing
or
navigat-
ing.
CAVITATION
-
Air
bubbles created
by
the
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
-
Angle
of the transducer's cone of sound. Lowrance
has transducers available with cone
angles
from 8 to 45
degrees
to suit
the
varying
needs of fishermen.
CRT
-
Abbreviation for Cathode
flay
Tube. See Video
Graph.
DEFINITION
-
The
ability
of a sonar unit's
display
to show detail.
A
display
with
high
definition can show more detail than one with low
definition.
DISCRIMINATION
-
A feature available on Lowrance L.C.G.'s and
paper graphs
that
separates
false echoes from true
target
information.
4 25
Display
Scroll
Speed
Maximum Chart
Range
Maximum
Digital flange
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