Furuno FE-700 manual Range Scale, Gain Control, Automatic Operation, Picture Colors

1.7 Range Scale

If the depth goes out of the correct display area, increase or decrease the range until the seabed appears near the center of the screen.

Adjust the Range Control, and current range selection is shown in the range display window.

RANGE 5 m

In the AUTO mode, the range scale is automatically adjusted. See section 1.9 for details.

1.8 Gain Control

The GAIN Control adjusts the sensitivity of the receiver. The AUTO mode provides automatic adjustment and you are normally not required to adjust it. Current setting is shown at the upper left-hand corner. Adjust the GAIN Control and the following window appears.

GAIN 5.5

Adjust the GAIN Control so that a slight amount of noise remains on the screen. Generally, use a higher gain setting for greater depths and a lower setting for shallower waters. Adjusting range is between 0.0 and 10.0 in 0.5 steps.

1.9 Automatic Operation

The automatic function automatically selects the proper gain, range scale and clutter level according to depth. It works as follows:

•The range changes automatically to locate the bottom on the lower half of the screen. It jumps to one step shallower range when bottom echoes reach a halfway point of the full scale from top and to one step deeper range when they come to the lower edge of the scale.

•The gain is automatically adjusted to display the seabed in specified color.

•Clutter level (on the menu), which works as a threshold control to suppress overall noise, is automatically adjusted.

Note: The AUTO MODE is cancelled whenever the range or the gain is changed.

How to enable/disable automatic operation

1.Press the AUTO key. The AUTO mode window appears.

AUTO MODE

OFF ON

-/ +: To set option

2.Press the [+] key to select ON or the [-] key to select OFF.

1.10Picture Colors

1.Press the COLOR key. The following window appears.

COLOR

- 1 2 3 4 5 6 7 8 9 +

2.Press the [+] or [-] key to select a number, referring to the table below. (You can see the result of your selection on the display.)

	Background	Seabed	Others marks
1	Monochrome, 8 intensities
2	Blue	Red infill	6 colors
3	Black	Red infill	6 colors
4	White	Red infill	6 colors
5	Blue	Yellow infill	6 colors
6	Black	Yellow infill	6 colors
7	White	Yellow infill	6 colors
8	Black	7 colors (Strata)
9	White	7 colors (Strata)

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