3.OPERATIONS
55
INITIAL SETTING
CALIBRATION
SHORT STC
High frequency
CALIBRATION
SHORT STC
FISH FINDER SETTING
INITIAL SETTING
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INITIAL SETTING
MARK RETURN TO PREVIOUS MENU
GOTO SUB MENU
GRAPH CLOSE MENU
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U
N
I
T
CALIBRATION
VR CURVE
BTM. DEC. LEVEL
EXT. TRIG. IN
EXT. SIG. IN
DATA INPUT
DATA OUTPUT
C CURVE
HI
LO
OFF ON
ON
OFF
LINEAR
0
0
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CALIBRATION
HI
HI
0
0
0
0
LO
LO
MARK RETURN TO INITIAL MENU
GOTO SUB MENU
GRAPH CLOSE MENU
0.0m
0.0m
0.0。
C
0.0%
0.0m/s
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D R A F T
BELOW KEEL
WATER TEMP
SHIP SPEED
SOUND SPEED
G A I N
SHORT STC
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SHORT RANGE STC
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▲
HI
LO
0
0
30
60
0
MARK RETURN TO INITIAL MENU
GRAPH CLOSE MENU
FISH FINDER SETTING
HI
OFF
AUTO
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GOTO SUB MENU
GRAPH CLOSE MENU
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INTERFERENCE
COLOR REJ.
FREQ. ADJUST
TX CYCLE MODE
1
2
3
4
5
6
7
8
SIGNAL PROCESS
INITIAL SET
STC MODE
TX CYCLE ADJ.
ADC MODE
TX PULSE WIDTH
WHITE LINE
P
D
C
1R1
0.0
LO
0.0
HI
D
D
LO
HI
200.0
50.0
LO
LONG
OFF
SYNC.
0
50
100
1
2
150
200
ASYNC.
SHORT
1R2
Adjusting the sensitivity obtained near the water level (SHORT STC)
The video obtained immediately after signal transmission has been
started will have a red tail, because the surface-layer water usually is
very dirty. To improve such video quality, the sensitivity obtained near
the water level (about one meter in water depth) must be adjusted
properly using the "SHORT STC" function of the menu.
Specify the "SHORT STC" correction value as follows:
1
Display the FISH FINDER SETTING menu by pressing the
and
keys together.
2
Move control to "INITIAL SETTING" by pressing the
or
key, and display the INITIAL SETTING submenu by pressing the
key.
3
Move control to "CALIBRATION" by pressing the
or
key,
and display the CALIBRATION submenu by pressing the
key.
4
Move control to "SHORT STC" by pressing the
or
key,
and display the SHORT STC submenu by pressing the
key.
5
Select either "HI" (high frequency) or "LO" (low frequency) by
pressing the
or
key.
6
Specify the short STC level by pressing the
or
key.
Example: "0" means no correction. A higher correction value
reduces the sensitivity obtained at a water depth of about one
meter.
7
Press the
MARK
key to return to the INITIAL SETTING submenu.
8
Press the
GRAPH
key to return to the fishfinding display.
This function is effective for the CFT-2505KD transducer.
Use the STC control (semi-fixed type) on the operations panel to
adjust the STC level. See page 14 for details.
Specify the appropriate value in "STC MODE" to activate the STC
function in a deeper range. See page 48 for further details.
Outline of the procedure: Proceed from the FISH FINDER
SETTING menu to "STC MODE" (50 to 200 m).
