Furuno MFD8 Installation Manual page 31

32.If main bang appears at the screen center, click the [-] [+] buttons for MBS Adjustment so that
the main bang disappears while watching the radar echo at the right-hand side of the display.
33.Click the [Radar Operation] button to adjust the tuning and video automatically.
34.Click the [Save and Exit] button to finish the Installation Wizard.
Setting the zero line area (For DFF series only)
Turn the zero line (transmission line) on or off. When turned off, the line is not shown, which allows
you to better watch fish echoes near the surface. The width of the line changes with transducer
used and installation characteristics. If the width of the line is 1.0 m or more, set the line area as
below.
1. At the normal operation mode, press the MENU key while pressing the CNTRL key down to
open the Serviceman menu.
2. Rotate the Rotokey to choose the Fish Finder tab, and push the Rotokey.
3. Rotate the Rotokey to choose Zero Line Rejection, and push the Rotokey to turn the zero
line on.
The icon turns green color, and the cursor moves to Zero Line Range.
4. For DFF3, rotate the Rotokey to set the effective area (setting area: 1.0 to 2.0 m) and push
the Rotokey. For DFF1 or DFF1-UHD, turn the zero line on or off.
5. Press the MENU key to close the menu.
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