Lowrance LCF-1440 Installation And Operation Instructions Manual page 12

bottom and make minor adjustments to the sensitivity level, with a bias
toward the setting you selected.
Adjusting sensitivity in Manual Sensitivity Mode is similar to driving a
car without cruise control — you have complete manual control of the
car's speed. In your unit, manual mode allows you to set sensitivity at
100 percent (maximum) or zero percent (minimum.) Depending on
water and bottom conditions, the bottom signal may completely
disappear from the screen when you reduce sensitivity to about 45
percent or less!
Try adjusting sensitivity in both auto and manual modes to see how
they work.
These figures show results of different sensitivity levels. At left, a high
Sensitivity setting shows a display crowded with many return signals.
At right, a lower Sensitivity setting shows only a few strong returns.
To adjust sensitivity:
Press
UP ARROW
it. When it's set at the desired level, press
menu.
The sensitivity percentage in use shows in this menu. As you
change the setting, echoes scrolling onto the screen will show the effects of
the change. If you reach the maximum or minimum sensitivity level, a tone
sounds alerting you to the limits.
NOTE:
If you want to change the sensitivity in Manual Mode,
first turn off Auto Sensitivity: press
S
ENSITIVITY
to select
ARROW
To adjust the sensitivity, follow the same steps used for
adjusting sensitivity in auto mode above.
until the
MENU
to increase the sensitivity,
A /M
UTOMATIC ANUAL
, then press
M
ANUAL
S A
ENSITIVITY DJUSTMENT
MENU
menu appears. Press
to clear the menu.
PWR
8
menu appears. Press
DOWN ARROW
to clear the
PWR
until the
DOWN
to decrease