Humminbird ONIX Operating Manual page 171

Adjust Display Settings
1. With a Down Imaging View displayed on-screen, tap Sonar (DI) in the status bar, or press the MENU key once.
2. Select Sensitivity, Contrast, Chart Speed, or Sharpness.
3. Press and hold the slider, or turn the Rotary dial, to adjust the setting.
Sensitivity
Contrast
Chart Speed
Sharpness
Set the Range
Range controls how much of the water column is displayed on the view. For example, if you are only interesed in the area between
20 and 50 feet deep, set the Upper Range to 20 and the Lower Range to 50. The view will not display sonar returns outside of the
set ranges, and greater detail for the selected range will be displayed.
1. With a Down Imaging View displayed on-screen, tap Sonar (DI) in the status bar, or press the MENU key once.
2. Select Range.
3. Select Upper Range. Press and hold the slider, or turn the Rotary dial, to adjust the setting.
4. Select Lower Range.
Auto: Move the slider to Auto. The Lower Range will be adjusted by the control head to follow the bottom automatically.
Man (Manual): Move the slider to Manual and adjust the setting.
Display the Depth Marker
To mark a specific depth on the view, turn on Depth Marker.
1. With a Down Imaging View displayed on-screen, tap Sonar (DI) in the status bar, or press the MENU key once.
2. Select Depth Marker.
3. Tap the on/off button, or press the ENTER key, to turn it on.
4. Press and hold the slider, or turn the Rotary dial, to adjust the setting.
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.
Adjust the Contrast setting to accent the light and dark parts of the Down Imaging data to
provide greater definition.
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.
Turn on sharpness and select a filter level to sharpen the edges of the Down Imaging data.
171 Down Imaging