Humminbird ONIX Operating Manual page 157

Adjust Display Settings
1. With a 2D Sonar View displayed on-screen, tap Sonar (2D) in the status bar, or press the MENU key once.
2. Select Sensitivity, Surface Clutter, or Chart Speed.
3. Press and hold the slider, or turn the Rotary dial, to adjust the setting.
Sensitivity
Surface Clutter
Chart Speed
Change the SwitchFire Mode
SwitchFire controls how the sonar returns are displayed in the 2D Sonar Views.
1. With a 2D Sonar View displayed on-screen, tap Sonar (2D) in the status bar, or press the MENU key once.
2. Select SwitchFire.
3. Select Clear Mode or Max Mode.
SwitchFire: Clear Mode
Choose Clear Mode to see less clutter and more fish size accuracy on the display.
When Clear Mode is selected, the clutter is filtered, and sonar returns are
interpreted to provide more details about the objects within the transducer beam,
regardless of their location. In other words, a large arch on the display means a
large fish has been detected.
Sensitivity controls how much detail is shown on the display and will adjust the sensitivity of
all sonar frequencies. Decrease the sensitivity to eliminate the clutter from the display that
is sometimes present in murky or muddy water. When operating in very clear water or greater
depths, increase the sensitivity to see weaker returns that may be of interest.
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.
Chart Speed determines how fast the sonar history moves across the display and how much
detail is shown. Select a faster speed to see more detail. Select a slower speed to keep the
sonar history on the display longer.
SwitchFire: Max Mode
Choose Max Mode to see only raw sonar returns on the display. When Max Mode
is selected, you will see the maximum sonar information available within the
transducer beam, so more fish arches and better jig tracking are shown.
157 2D Sonar