Surface Clutter (Advanced); Noise Filter; Max Depth - Humminbird 383c Operation Manual

531450-1_A - 383c_Eng.qxd 11/18/2005
Surface Clutter
(Advanced)
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).
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)
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Surface
Clutter
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Noise Filter

(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
hinder your unit's ability 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, High1, High2, High3, Default = Low)

Max Depth

(Advanced)
Max Depth adjusts the maximum depth of operation. The performance of your 300
Series™ Fishing System can be tuned to the maximum depth you will be fishing in
by setting the Max Depth. When a maximum depth is set, your 300 Series™ Fishing
System will not attempt to acquire sonar data below that depth, thus increasing
overall performance. When Max Depth is set to Auto, the 300 Series™ Fishing
System will acquire bottom readings as needed (within the capacity of the unit). If
the bottom is deeper than the Max Depth setting, the digital depth readout will
flash, indicating that the 300 Series™ Fishing System cannot locate the bottom. The
Max Depth menu choice is available when User Mode is set to Advanced (see Setup
Menu Tab: User Mode).
To change the Max Depth setting:
1. Make sure you are in Advanced User Mode, then highlight Max Depth on the
Sonar main menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Max Depth
setting. (AUTO, 10 to 1000 feet, 3 to 330 meters [International Models only],
Default = AUTO)
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