Operation; Automatic; Sensitivity - Lowrance X-70A 3D Operation Instruction Manual

OPERATION

The Automatic and Sensitivity features used on the X-70A 3D are the
same for all modes of operation. This section will explain these features.
For information on features specific to different modes, see the 2D or 3D
operation sections.

AUTOMATIC

The X-70A 3D adjusts the sen-
sitivity and range to keep a
detailed bottom signal on the
display when the automatic
feature is on. This is enabled
when the unit is first turned on.
You can turn this feature off to
gain greater control over the
adjustments and features of
this unit.
To turn automatic off, press the AUTO key. A screen similar to the one
above appears. Now press the AUTO key again. This moves the check
mark from the "AUTO" box to "MAN". Press the CLR (clear) key to erase
the menu. To switch back to manual, repeat the above steps, but move the
check mark to the "AUTO" box using the AUTO key.

SENSITIVITY

The sensitivity control adjusts
the receiver's ability to show
echoes. If it's adjusted prop-
erly, the sonar unit shows not
only the bottom, but targets
(such as fish) with little or no
noise. If the sensitivity is
turned too low, no fish signals
will show, and you will lose the
bottom signal in fairly shallow
water.
When the X-70A 3D is in the automatic mode, the computer inside ad-
justs the sensitivity for the best setting. You can override this setting, add-
ing or subtracting the amount of sensitivity the computer uses. You can
also take complete control of the sensitivity level when the unit is in the
manual mode.
11