Furuno FR-8122 - Manual (Page 34)

3. SETTING UP THE EQUIPMENT
3-6
Manual MBS Adjust
Main bang (black hole), which appears at the display center on short ranges, can be
suppressed as follows.
1. Transmit the radar on the short range.
2. Open the Installation menu and choose Manual MBS Adjust.
3. Press the ENTER key to show the setting window.
4. Rotate the trackball to suppress main bang (between 0 and 255).
5. Press the ENTER key to finish.
Video Initial Adjust
After completing Auto Installation Setup, you can fine tune the video signal.
1. Transmit the radar and set as follows.
Gain: one o’clock A/C Sea: zero A/C Rain: zero
Echo Average: Off Noise Rejecter: Off Interference Rejecter: Med.
2. Open the Installation menu and choose Video Initial Adjust.
3. Press the ENTER key to show the setting window.
4. Rotate the trackball to adjust the video so that the white noise slightly appears. The
setting range is 0 to 31. The greater the value, the higher the gain.
5. Press the ENTER key to finish.
Note: If the display unit is used as a Sub-display, set the “Input Source” to “Sub” and
perform the Video Initial Adjust as mentioned above so that the echo presentation on
the sub-display is the same as that on the main display.