−10 −
−11 −
This describes operation for single frequency display.
※
You can change sensitivity by GAIN
1
key or GAIN
2
key.
※
Single frequency display or dual frequency display is selected on menu. (
→
page
20
)
※
When the unit is delivered from factory, dual frequency display mode is set.
[Gain]
This adjusts the sensitivity to distinguish the bottom or fish school easily.
32
steps of sensitivity
from
0
to
31
is displayed in bar. Optimum sensitivity is that second reflection from bottom is
barely displayed.
[Second reflection]
First received echo reflected from bottom is called the first reflection. It's first reflection reflected
from the surface of water goes toward the bottom again. The next reflection from bottom is
called the second reflection. Normally, it's second reflection is shown on the twice depth of the
actual bottom (first reflection).
1
[To decrease sensitivity]
Each time when you press GAIN
1
key, gain bar
becomes short and the sensitivity decreases.
2
[To increase sensitivity]
Each time when you press GAIN
1
key, gain bar
becomes long and the sensitivity increases.
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<Too poor sensitivity>
<Too much sensitivity>
<Good>
Bottom is shown in green or
white.
As second reflection is shown,
it is easy to distinct the fish
school.
As plankton, stains in water,
and etc. are shown, it is difficult
to distinct the fish school.
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3. TO ADJUST SENSITIVITY
In case of single frequency display
