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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