Surface Clutter (Advanced); Noise Filter (Advanced) - Humminbird 900 Series Installation And Operation Manual

Surface Clutter adjusts the filter that removes surface clutter noise caused
by algae and aeration. The lower the setting, the less surface clutter will be
displayed. The Surface Clutter menu choice is available when User Mode is
set to Advanced (see Setup Menu Tab: User Mode).
Surface Clutter
To change the Surface Clutter setting:
1. Make sure you are in Advanced User Mode, then highlight Surface
Clutter on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the
Surface Clutter setting. (Low = 1 to High = 10, Default = 5)
Surface Clutter
(Advanced)
Noise Filter adjusts the sonar Noise Filter to limit interference on the display
from sources such as your boat engine, turbulence, or other sonar devices.
The Noise Filter menu choice is available when User Mode is set to
Advanced (see Setup Menu Tab: User Mode).
NOTE: The Off setting removes all filtering; Low, Medium and High settings add
progressive filtering of the sonar returns. In some deep water situations, the High
setting may actually make it harder for the control head to find the bottom.
To change the Noise Filter setting:
1. Make sure you are in Advanced User Mode, then highlight Noise
Filter on the Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the
Noise Filter setting. (Off, Low, Medium, High 1, High 2, High 3,
Default = Low)
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Noise Filter
(Advanced)