Furuno Ls4100 Manual Operation, Range offset, Gain offset, Choosing the manual mode

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.

AUTO RANGE OFFSET

+0 ft

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.

AUTO GAIN OFFSET
Min	±0	Max

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. MANUAL 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

Unit				Basic Range
	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.

6