Adjusting beamwidth – Furuno CSH-84 User Manual
Page 32
3-6
Setting Noise limiter (data setting window: SIGNAL,
SIGNAL PROCESS)
Weak, unwanted reflections, colored light-blue or green, appear
when the water is dirty, plankton layers exists, or due to ship’s
noise. The noise limiter (NL) can reduce the effects of these
unwanted reflections–raising the setting causes them to become
bluish to background color. Normally a setting of 3 or 4 is suffi-
cient.
Adjusting Beamwidth
Beamwidth can be adjusted at SONR•BEAM, BEAM on the
data setting window.
Table 3-1 Beamwidth adjustment menus
u
n
e
M
n
o
i
t
a
c
i
l
p
p
A
R
O
H
e
h
t
g
n
i
t
t
e
s
e
h
t
r
e
h
g
i
h
e
h
T
.
e
s
u
l
a
m
r
o
n
r
o
f
"
0
"
o
t
t
e
S
d
e
s
u
e
b
y
a
m
l
o
r
t
n
o
c
s
i
h
T
.
m
a
e
b
e
h
t
r
e
w
o
r
r
a
n
s
s
e
r
p
p
u
s
o
t
s
l
o
r
t
n
o
c
L
N
d
n
a
C
G
A
e
h
t
h
t
i
w
r
e
h
t
e
g
o
t
.
s
e
o
h
c
e
d
e
b
a
e
s
d
n
a
s
n
o
i
t
c
e
l
f
e
r
e
c
a
f
r
u
s
a
e
s
R
E
V
.
z
H
k
8
8
d
n
a
1
8
,
5
7
y
c
n
e
u
q
e
r
F
X
T
f
o
e
s
a
c
n
I
l
a
m
r
o
n
r
o
f
e
s
U
.
g
n
i
t
t
e
s
d
r
a
d
n
a
t
s
s
i
s
i
h
T
:
0
.
s
n
o
i
t
i
d
n
o
c
.
)
k
a
e
w
(
s
e
s
i
o
n
e
c
a
f
r
u
s
a
e
s
e
h
t
s
s
e
r
p
p
u
s
o
t
s
i
s
i
h
T
:
1
0
e
l
g
n
a
t
l
i
t
n
e
e
w
t
e
B
°
3
1
d
n
a
°
t
l
i
t
e
h
t
r
e
w
o
l
e
h
t
,
.
e
g
n
a
r
r
a
e
n
r
o
f
C
G
A
e
h
t
r
e
g
n
o
r
t
s
e
h
t
,
e
l
g
n
a
.
e
v
i
t
c
e
f
f
e
e
r
o
m
s
i
C
G
A
t
u
b
,
"
1
"
e
v
o
b
a
s
a
e
m
a
S
:
2
n
e
e
w
t
e
b
e
v
i
t
c
e
f
f
e
s
i
C
G
A
t
u
b
,
"
1
"
e
v
o
b
a
s
a
e
n
a
S
:
3
5
-
e
l
g
n
a
t
l
i
t
°
0
6
d
n
a
°
.
.
e
v
i
t
c
e
f
f
e
e
r
o
m
s
i
C
G
A
t
u
b
,
"
3
"
e
v
o
b
a
s
a
e
m
a
S
.
4
.
z
H
k
7
0
1
d
n
a
4
9
y
c
n
e
u
q
e
r
F
X
T
f
o
e
s
a
c
n
I
l
a
m
r
o
n
r
o
f
e
s
U
.
g
n
i
t
t
e
s
d
r
a
d
n
a
t
s
s
i
s
i
h
T
:
0
.
s
n
o
i
t
i
d
n
o
c
t
u
p
t
u
o
e
h
T
.
e
g
n
a
r
r
a
f
g
n
i
t
c
e
t
e
d
r
o
f
d
e
s
u
s
i
s
i
h
T
:
1
e
g
n
a
r
r
a
e
n
f
o
)
G
V
T
(
n
i
a
g
e
h
t
d
n
a
p
u
s
e
o
g
r
e
w
o
p
.
d
e
n
e
r
p
p
u
s
s
i
e
h
T
.
n
o
i
t
a
t
n
e
s
e
r
p
e
h
t
g
n
i
v
o
r
p
m
i
r
o
f
d
e
s
u
s
i
s
i
h
T
:
2
g
n
i
v
i
e
c
e
r
e
h
t
d
n
a
n
e
t
r
o
h
s
s
i
h
t
g
n
e
l
e
s
l
u
p
t
u
p
t
u
o
.
p
u
s
e
o
g
n
i
a
g
G
V
T
.
s
e
s
i
o
v
e
c
a
f
r
u
s
e
h
t
s
s
e
r
p
p
u
s
o
t
s
i
s
i
h
T
.
3
;
s
w
o
l
l
o
f
s
a
s
e
g
n
a
h
c
a
e
r
a
e
v
i
t
c
e
f
f
e
m
0
0
1
o
t
0
:
r
a
e
N
m
0
0
4
o
t
5
2
:
m
u
i
d
e
M
m
0
0
1
n
a
h
t
e
r
o
M
:
r
a
F
s
e
o
g
X
R
d
n
a
X
T
r
o
f
h
t
d
i
w
m
a
e
b
l
a
c
i
t
r
e
v
e
h
T
:
4
.
l
a
m
r
o
n
n
a
h
t
r
e
d
i
w