Furuno FE-700 manual Menu Operation, Menu Overview, Suppressing Low Level Noise

2 MENU OPERATION

2.1 Menu Overview

The menu has several functions for advanced operation.

1.Select MENU with the MODE Selector.

	CLUTTER
	(0∼ 16)
AUTO

INTERFERENCE REJECT

OFF IR1 IR2 IR3

PICTURE ADVANCE

SLOW FAST

TREND INDICATOR

OFF		ON
		INTERVAL
5 s			2 min
	1 min

1/2

▼▲: To select item

-+: To set option

2.Press the [▲] or [▼] key to select menu item. As you operate the [▲] or [▼] key, the selected item and its current setting appear in reverse video.

3.Press the [-] or [+] key to select option desired.

4.Set the MODE Selector in another position to close the menu.

2.2Suppressing Low Level Noise

Light-blue dots may appear overall screen. This is mainly due to dirty water or noise. This noise can be suppressed by adjusting CLUTTER (in reality, Threshold of the amplifier).

When the automatic mode is on, the suppression setting is automatically adjusted. For manual override, do the following:

1.Select MENU with the MODE Selector.

2.Select CLUTTER by pressing the [▲] key.

3.Press the [-] or [+] key to select clutter rejection level desired. The higher the number the higher the degree of suppression. Note that weak echoes may not be displayed when the clutter circuit is on.

2.3 Suppressing Interference

Interference from other acoustic equipment operating nearby or other electronic equipment on your boat may show itself on the display.

To suppress interference, do the following:

1.Select MENU with the MODE Selector.

2.Select INTERFERENCE REJECT by pressing the [▲] or [▼] key.

3.Press the [-] or [+] key to select degree of suppression desired; OFF, IR1, IR2 or IR3. The higher the number the greater the degree of suppression.

Note that oversuppression will weaken the sensitivity.

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