Furuno FE-700 - Manual (Page 17)

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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.
1.10 Picture 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)