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TABLE OF
CONTENTS
TRANSDUCER -The element of a sonar
system
that convertsthe
electrical
energy
from the
transmitter Into ultrasonic
sound waves. When a
return
echo strikes the
transducer,
it converts
the sound waves into electrical
POWER
CONNECTIONS 2
energy
which is
received and
displayed by
the sonar unit.
NOISE
3
TRANSDUCER
3
TRANSOM MOUNT-
A method of
mounting
transducers or other sensors
KEYBOARD
BASICS
4
1.
S I I...
DISPLAY
INTERPRETATION
6
on ti .e transom o. t1
e oat.
OPERATION
7
ON
7
UPPER/LOWER
UMIT-These
arethe
range
limits
displayed
on
the sonar
screen or
paper.
The
upper
limit is shown
at the
top
of the
display,
while
CLEAR
7
the lower limit
is at the bottom. For
example,
a 20 to 30 foot
range
has20
AUTO
s
feet as the
upper
limit and 30 feet as
the lower limit.
SENSITMTY
8
CHART SPEED
9
VIDEO GRAPH
-
A
sonar unit that uses
a CRT or television
type
display.
SCALE
11
RANGE
11
WINDOW
-
A
segment
of the
depth range.
For
example,
an
upper
limit
of
LOWER LIMIT
12
20
feet and a lower
limit of 50 feet creates
a 30 foot window.
UPPER
UM1T
12
AUTO BOTTOM
TRACKING
13
GRAYLINE
14
ZOOM
-
A feature
that
enlarges targets
on the
display.
DIGITAL
15
TENTHS
16
ALARMS
16
NOTE KEY
16
ZONE ALARM
17
DEPTH ALARM
18
LIGHT
19
DiSCRIMINATION
19
8CC
20
FEET-FATHOMS-METERS
21
PULSE
22
COMMAND
22
MENU #1
-
SPEAKER
VOLUME
23
MENU #2- GRAYLINE
CHECKS/LINES
24
MENU #3
-
SCALES
24
MENU #4
-
DIGITAL
AVERAGING
25
TRANSDUCERS AND
CONE ANGLES
26
SIGNAL
INTERPRETATION
27
FISH SIGNALS
28
WATER
TEMP. AND
THERMOCLINES
29
SURVEYING A LAKE
31
BAIT P1514
32
HOW
TO OBTAIN SERVICE
32
SCHEMATIC AND PARTS LIST
32
SPARE
PARTS
33
SPECIFICATIONS
33
GLOSSARY
34
Copyright
© 1987 Lowrance
Elecfronios,
Inc. All
Rights
Res3rved.
37
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