Furuno FR-8122 Installation Manual page 32

3. SETTING UP THE EQUIPMENT
1. Transmit on the shortest range and confirm that gain and A/C SEA are properly
adjusted.
2. Visually select a target which forms straight line (harbor wall, straight piers).
3. Open the Installation menu and choose Manual Timing Adjust.
4. Press the ENTER key to show the setting window.
5. Rotate the trackball to straighten the target selected at step 2, and then press the
ENTER key to finish.
Manual MBS Adjust
Main bang (black hole), which appears at the display center on short ranges, can be
suppressed as follows.
1. Open the Installation menu and select b Manual MBS Adjust.
2. Press the ENTER key to show the setting window.
3. Rotate the trackball to suppress main bang (between 0 and 25).
4. Press the ENTER key to finish.
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