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TRANSDUCERS AND CONE ANGLES
The sound waves from the transducer
spread
out into the
water in
a cone
shaped
beam.
This looks much like the beam from
aflashlight.
The
angle
between the outside
edges
of
the cone is the cone
angle.
Lowrance offers a choice of transducers
with either an 8 or 20
degree
cone
angle.
These will
interchange
with
any
of the 192 kHz sonar
products.
In other
words,
use
any
Lowrance sonar
Instrument with
any
Lowrance transducer of the same
frequency
with no
loss of
performance.
However,
the use of
anyother
manufacturers'
transducerwill result in a loss
of
performance.
Typically,
wide cone
angle
transducers
(20
degrees)
are ideal for
operating
in shallow to medium water
depths.
The
20
degree
cone
angle
allows
you
to see more of the underwater world. In 15
feet of water the 20
degree
cone covers an area about sixfeetacross.
The 8
degreetransducer
covers
only
about a two foot circle.
There are ten
scale markers
printed
on both sides of
the
display.
This
helps
to determine
the
depth
of
a
target.
For
example,
If
the
range
is
0 to
60
feet,
then each
mark Is
equal
to six feet. If a
target (such
as
a
fish)
Is
next tothe 5th
line,
then it is 30
feet
deep.
(5linestimes6feet
=
30
feet.)
To make
it easier to use the
depth
scale,
use
ranges
in
multiples
often,
Le.
10,20,30,
etc.
When the X-40 is
in auto-
matic,
the
ranges change
to
keep
the bottom
signal
on the
display
as
the bottom
depth
varies. At
times,
however,
it
may
be desirable to
expand
the
range
or zoom In on a
target.
The
upper
limit
adjusts
from
0 to 9989 feet and the lower
limit
from lOto999Qfeet.
Any
combina-
tion of the two limits Is
allowed ex-
ceptthe
lower limit cannot
be closer
than ten feet to
the
upper
limit.
Entering
a
segment
less
than ten
feet causes the
X-40 to sound an
alert. The
range
will then
remain at
the
previous setting.
--a
SCALE
pt•
Con.
MgI.
DIITIS
r a'
50 Ttt.
IBt
lOG 14- 35-
ISO 21- 53-
200 U- 71-
RANGE
50'
100'
150'
200'
8°at3db
—it
H8t
-
LOWER LIMIT
26
11
NOTE: The
maximum
depth capa-
bility
of
the X-40
depends
on water
and bottom
conditions
plus
the
qualityofthetransducer
installation.
See the
specifications
for
typical
bottom
depth capability.
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