Lowrance LCF-1440, Installation And Operation Instructions Manual

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7
If your transducer has a built-in temp sensor connected, the water
temperature will appear inside the circle. This temperature display can
be turned on and off. See the later entry on Temperature for off and on
instructions
RANGE
When turned on, the unit automatically adjusts the depth
range according to water conditions. When in auto range
mode, it always keeps the bottom displayed near the "Deep
End" of the Flasher. You can over-ride the automatic depth
range control and manually select a depth range.
To do this, press
MENU
until the
R
ANGE
menu appears. Press the
DOWN
ARROW
to select
M
ANUAL
, then press
MENU UP
to display the
R
ANGE
S
IZE
menu. Use the arrow keys to select a desired depth range.
When you're finished, press
PWR
to clear the menu from the
display.
This unit has the following depth ranges: 10, 20, 40, 80, 160,
320 and 640 feet.
SENSITIVITY
Sensitivity controls the unit's ability to pick up echoes. If you
want to see more detail, try increasing the sensitivity, a little
at a time. There are situations when too much clutter
appears on the screen. Decreasing the sensitivity can reduce
the clutter and show the strongest fish echoes, if fish are
present. As you change the sensitivity setting, you can see the
difference on the chart as it scrolls.
You can change the sensitivity level whether you are in Auto Sensitivity
mode or Manual Sensitivity mode. The adjustment method works the
same in both modes, but it gives you slightly different results.
Adjusting sensitivity in Auto Sensitivity Mode is similar to manually
adjusting a car's speed with the accelerator pedal while cruise control is
on. You can tell the car to run faster, but when you let off the gas the
cruise control
automatically
keeps you from running slower than the
minimum speed setting.
In your unit, auto mode will let you increase sensitivity to 100 percent, but
the unit will
limit
your
minimum
setting. This prevents you from turning
sensitivity down too low to allow automatic bottom tracking. When you
change the setting with auto turned on, the unit will continue to track the