Furuno FSV-84 manual Adjust Near AGC

4. SLANT MODE

4.8.4Adjust Near AGC

When an excessively strong echo is received in shallow or heavily sedimented waters, you may not be able to suppress it by the TVG control alone. In this case, a fish school which is displayed at more than 300 m away may disappear gradually when the ship is approaching the fish school.

Use the Near TVG feature to suppress this strong echo. Normally set it between 3 and 4, however, this setting depends on the sea area. Do not set it too high; all echoes (including noise) from near distance may be painted in red.

1.Press the [MENU] key to open the menu.

2.Select S-SCAN SETTING menu and press the [MENU] key.

3.Select NEAR AGC and press the [MENU] key.

4.Adjust setting from the dialog box as appropriate and press the [MENU] key. The setting range is 0-10. The higher the setting the greater the echo level of near distance.

5.Select QUIT and press the [MENU] key.

6.Select QUIT at the top of the menu screen and press the [MENU] key to close all menus.

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