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7. FISH FINDER OPERATIONS
7-10
To adjust the shift, open the full RotoKey menu then select
[Shift] to show the [Shift] window. Turn the key clockwise to in-
crease the shift, counterclockwise to decrease the shift.
7.6.3 How to adjust the gain
The gain controls how echoes of different strengths are dis-
played. Set the gain to show a slight amount of noise on the screen. Increase the gain
for greater depths and lower the gain for shallow waters.
To set the gain, open the RotoKey menu then select [Gain 50 kHz] or [Gain 200 kHz]
to show the [Gain] window. Turn the key clockwise to increase the gain, counterclock-
wise to decrease the gain. 100 is the maximum gain.
7.6.4 How to reduce clutter
Low intensity “spots” of noise appear over most of screen like in the illustration shown
below. These spots of noise are caused by sediment in the water or noise.
To reduce clutter, open the full RotoKey menu then select [Sensitivity] and [Clutter] to
show the [Clutter] window. Turn the key clockwise adjust the clutter. Clockwise rota-
tion increases the clutter reduction.
CAUTION
Adjust the gain correctly.
Incorrect adjustment can lead to a
dangerous situation if the boat is steered
according to the depth indication.
Gain too high
Gain proper
Gain too low