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.
