Selection Of Frequency; Setting Of Immunity To Air Bubbles - Icom FP-561 Instruction Manual

2
rSOUNDER MODEq SELECTION OF FREQUENCY

(2) Selection of Frequency

GPS
SOUNDER MENU
FREQUENCY
STC
DSP SPEED
I.R
N.R
SEL
CANC
CLR
(3) STC; Setting of Immunity
to Air Bubbles
GPS
SOUNDER MENU
FREQUENCY
STC
DSP SPEED
I.R
N.R
ADJ
CANC
CLR
49
To select the Sounder frequency between "High (H)" and "Low (L)", proceed
as follows. (Default; H)
q Press the [MENU] key.
48 21.417N 125 26.643W
The Main Menu screen will appear.
0
w Select "Sounder Menu" using the [UP] or [DOWN] key and press the [SET] key.
H
L
1
20 The Sounder Menu screen will appear.
STOP
5
OFF
ON
e Select "Frequency" using the [UP] or [DOWN] key and press the [SET] key.
1 OFF
40
The selected item turns blue.
r Select "Ò" (50 kHz) or "Ó" (200 kHz) using the [LEFT] or [RIGHT] key and press
60
the [SET] key.
The selected frequency will be indicated in the frequency field on fishfinder
80
screens.
t When you finish selecting the frequency, press the [MENU] key to close the Main
100
SET
SET
43.4 Menu screen.
FT
The following table summarizes characteristics and main applications of the low
and high frequencies.
Directivity
Depth coverage
Resolution
Immunity to bubbles and
underwater noises
Main application
To set the immunity to air bubbles in the sea surfaces so as to improve the
image legibility, proceed as follows. (Default; 1)
q Press the [MENU] key.
The Main Menu screen will appear.
48 21.417N 125 26.643W
w Select "Sounder Menu" using the [UP] or [DOWN] key and press the [SET] key.
0
The Sounder Menu screen will appear.
H
L
1
e Select STC using the [UP] or [DOWN] key and press the [SET] key.
20
5 STOP
ON OFF
The selected item turns blue.
OFF
1
40
r Enter the desired immunity level from among 15 levels using the [UP] or [DOWN]
key and press the [SET] key.
60
The setting is now saved.
t When you finish setting the immunity level, press the [MENU] key to close the
80
Main Menu screen.
100
SEL
SET
SET
43.4
FT
Frequency
(directional angle)
(detection of fish density)
Immunity level too high
GPS 48 21.417N 125 26.643W
0
20
40
60
80
100
H
43.4
315 T 10.2KT 58 F
FT
Low (L)
High (large) Low (small)
Deep Shallow
Low High
Low High
Search of board
Diagnosis of fish
area, underwater
density or fish size
geological survey
Immunity level too low
GPS 48 21.417N 125 26.643W
0
20
40
60
80
100
H
43.4
315 T 10.2KT 58 F
FT
High (H)