Furuno Ls4100 - Manual (Page 12)

6
5. Press the [MENU/ESC] key to close
the menu.
The auto mode in use is shown as
(Auto-Fishing) or
(Auto-Cruising) at the top left corner on
the screen.
Note:
When in the auto mode, SHIFT
and CLUTTER cannot be adjusted
manually.
Range offset
To display the bottom tail in detail in the
automatic mode, offset the range as
below.
1. Press the [+] or [-] key of the
[RANGE] key.
+0 ft
AUTO RANGE OFFSET
Auto range offset window
2. Press the [+] or [-] key of the
[RANGE] key again to choose offset
desired (range: -100 to +300 ft).
Note that if the basic range is
changed the offset is returned to “0”.
3. Press the [MENU/ESC] key to finish.
Gain offset
Gain offset lets you override automatic
gain adjustment.
1. Press the [GAIN] key.
Min Max ± 0
AUTO GAIN OFFSET
Auto gain offset window
2. Press ◄ or ► key to offset gain
(setting range –5 to +5). The gain
selected is shown at the top of the
screen as
G (Gain) + (or -) XX (offset value).
3. Press the [MENU/ESC] key to finish.
1.7 Manual Operation
Choosing the manual mode
1. Press the [MENU/ESC] key to open
the main menu.
2. Press ▲ to choose AUTO MODE
from page 1 of the menu.
3. Press ► to show the window.
4. Choose Off with ▲.
5. Press the [MENU/ESC] key to close
the menu. appears at the top
left corner on the screen.
Choosing range
The basic range and range shifting
functions used together give you the
means to choose the depth you can see
on the screen. The basic range can be
thought of as providing a “window” into
the water column and range shifting as
moving the “window” to the desired
depth.
Choosing basic range
The basic range may be chosen with
the [RANGE] key from the eight ranges
shown in the table shown below. (“P/B”
in the table means Passi/Braza.) The
setting range can be arranged through
the SYSTEM menu.
Default ranges
Basic Range
Unit
1 2 3 4 5 6 7 8
meters 5 10 20 40 80 150 200 300
feet 15 30 60 120 200 400 600 1000
fathoms 3 5 10 20 40 80 100 150
hiro* 4 8 15 30 50 100 150 200
P/B 3 5 10 30 50 100 150 200
*Japanese unit of depth measurement
1. Press the [+] or [-] key of the
[RANGE] key and the display should
now look something like the one on
at the top of the next page.
2. Press the [+] or [-] key of the
[RANGE] key again to choose a
basic range.