Koden CVS-FX2, Installation Manual, Page: 67 / 78

CVS-FX2/FX2BB Chapter 2 Adjustment
0092602002-12
2-5
Caution: In case of inner-hull
installation, the set value of gain
(TD) varies depending on the
materials of bottom of the ship
and the processing method. In
some cases, low frequency side
cannot be used due to too much
attenuation of ultrasonic signal
at ship
’s bottom.
2.6 Setup of Gain (TD) for
transducer
Correct
– Gain (TD)
The insufficient gain due to ultrasonic signal
attenuation can be corrected. Accuracy of
bottom detection is adjusted. Such false
recognition can be corrected that a deeper
position is recognized as sea bottom than
actual, or large fish school is recognized as
sea bottom.
It is not necessary to do this gain correction
for TDM-052, as the factory default setting is
optimized for TDM-052.
1. Press .
2. Select [Correct]
– [Gain (TD)].
3. Press [ ] of .
The screen will turn to the gain (TD)
adjustment screen and displays the
gain (TD) setup box at the upper side of
the screen.
4. Setup the Gain (TD) by turning the gain
knob, which are lighted red or green, at
the side to be adjusted.
When a red square mark appears at right
side upper corner of the Gain (TD) setup
box, the red lighted gain knob shall be
operated. When there is a green square
mark, turn the green lighted gain knob.
The gain (TD) setting shall be adjusted in
such a way that the white line in sea
bottom has the same thickness as that of
the strongest signal color area.
5. Pressing the gain knob at the side to be
adjusted a few times, move to the
position of the Gain (TD) box to be
adjusted. (the red mark at right top side
will move)
When there are more than 2 screens,
press the gain knob at the screen to be
adjusted. The gain knob pressed will turn
red. (The center screen of 3 screens will
be the right side screen)
6. Press to close the menu.
W
W
h
h
i
i
t
t
e
e
l
l
i
i
n
n
e
e
s
s
h
h
o
o
u
u
l
l
d
d
h
h
a
a
v
v
e
e
t t h h e e s s a a m m e e t t h h i i c c k k n n e e s s s s a a s s
t
t
h
h
e
e
(
(
d
d
a
a
r
r
k
k
e
e
s
s
t
t
)
)
c
c
o
o
l
l
o
o
r
r
f
f
o
o
r
r
t t h h e e s s t t r r o o n n g g e e s s t t s s i i g g n n a a l l . .
This part is lighted red or green