Furuno FSV-84 manual Color response curve

2. HORIZONTAL MODE

COLOR RESPONSE…: Adjusts reflected echo strength versus echo color level for currently selected color response number.

To adjust the curve, place the trackball at the point desired and press the [MENU] key. On the horizontal axis input level relative value is shown in the range from 0 to 100%. The setting range for input level is 0-100% in increments of 10% and output level is 0-100% in any value.

To set input level versus output level, use the trackball to place the trackball mark on location desired and press the [MENU] key.

H-SCAN COLOR	DEFAULT	CANCEL	QUIT	DEFAULT: Select to restore default
100
				setting for selected color response.
				CANCEL: Select to cancel change.
80				QUIT: Select to finish.

60

40

20

Currently selected color

0 20 40 60 80 100

Input level scale

Color response curve

GAIN OFFSET: Adjusts gain level. If the front panel [GAIN] control does not provide satisfactory gain adjustment, enter an offset here. The setting range is 0-12.

SIGNAL LEVEL: Dirty water or reflections from plankton may be painted on the screen in green or light-blue. These echoes may be erased in order of strength. The setting range is 0-15.

FAR TVG CURVE: Selects the TVG curve to use. The setting range is TVG1-TVG4. The higher the setting the sharper the gain curve.

ABSORPTION COEFF: Attenuation of the acoustic pulse underwater varies with sea area and water temperature. This menu item is provided to offset absorption; however, the default setting is suitable in most cases. If sensitivity decreases with distance, increase the absorption coefficient setting. And if it increases with distance decrease this setting.

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