select “Auto Sensitivity” and press the ENT key. To turn it off, repeat the above steps. Press the EXIT key to erase the menu.
COLORLINE
Colorline lets you distinguish between strong and weak echoes. It “paints” gray on targets that are stronger than a preset value. This allows you to tell the difference between a hard and soft bottom. For example, a soft, muddy or weedy bottom returns a weaker signal which is shown with a narrow, lighter colored colorline. A hard bottom returns a strong signal which causes a wide gray line.
If you have two signals of equal size, one with color and the other without, then the target with color is the stronger signal. This helps distinguish weeds from trees on the bottom, or fish from structure.
STRONG SIGNAL
WEAKER SIGNAL
COLORLINE
Colorline is adjustable. Since Colorline shows the difference between strong and weak sig- nals, adjusting the sensitivity may
require a different Colorline level, also. The level chosen by the unit at power on is usually adequate for most conditions. Experiment with your unit to find the Colorline setting that’s best for you.
To adjust the Colorline level, press the MENU key, then select “Colorline”. The screen above appears. Use the up or down arrow keys to adjust the color level. You can see the change on the chart record as you press the keys. After you’ve finished, press the EXIT key to erase the menu.
RANGE - Automatic
When turned on for the first time, the bottom signal is automatically placed in the lower half of the screen. This is called Auto Rang- ing and is part of the automatic function. However, depending upon the bottom depth and the current range, you can change the range to a different depth. To do this, press the MENU key, then select “Depth Range”. The screen
at right appears. Press the up or down arrow keys to select a different
13
