How To Adjust The Gain; How To Reduce Clutter - Furuno GP-1670F Operator's Manual

7. FISH FINDER OPERATIONS
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.
7.7.3

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.
Gain too high Gain proper
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.
7.7.4

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 ad-
just the clutter. Clockwise rotation increases the clutter reduction.
7-10
Gain too low
CAUTION
Adjust the gain correctly.
Incorrect adjustment can lead to a
dangerous situation if the boat is steered
according to the depth indication.
Clutter