Humminbird HELIX Series Operation Manual page 38

Select the Digital Depth Source
Depending on the depth, the control head will automatically choose the 2D conical beams or the Down Imaging beams to display
the depth digital readout. If the depth is deeper than 350 ft, or if you connect an ice transducer to the control head, set the Digital
Depth Source to 2D Element.
NOTE: Selecting the Digital Depth Source is available on the following models: DI, CHIRP DI, CHIRP MEGA DI, CHIRP MEGA DI+,
CHIRP MEGA SI, and CHIRP MEGA SI+.
1. Main Menu (Custom User Mode): Press the MENU key twice. Select the Sonar tab.
2. Select Digital Depth Source.
3. Select Auto or 2D Element.
Auto: The control head will acquire the digital depth as needed.
2D Element: Select 2D Element if the depth is deeper than 350 feet. Down Imaging is not available with this setting.
Turn on Max DI
(CHIRP MEGA SI models only)
Max DI (On) is typically used for deep water to provide the maximum strength for the Down Imaging signal. Max DI (Off) typically
provides the best resolution in shallow water.
1. Main Menu (Custom User Mode): Press the MENU key twice. Select the Sonar tab.
2. Select Max DI.
3. Select On or Off.
Change DI Frequency Presets
Increased Range is typically used for deep water to provide the maximum strength for the Down Imaging signal. Increased Detail
typically provides the best resolution in shallow water.
1. Main Menu (Custom User Mode): Press the MENU key twice. Select the Sonar tab.
2. Select DI Frequency.
3. Select Increased Detail (default) or Increased Range.
Change the Water Type
The Water Type was set when you first configured the unit with the Quick Setup dialog box (see Getting Started: Quick Setup). Water
Type affects the accuracy of deep water depth readings and configures the control head for operation in fresh or salt water. Use
the instructions in this section to change the Water Type setting.
1. Main Menu (Custom User Mode): Press the MENU key twice. Select the Sonar tab.
2. Select Water Type.
3. Select one of the following for your water type and depth conditions:
Fresh
Salt (shallow)
Salt (deep): If the depth is more than 330 ft (100 m), select Salt (deep).
Set up Sonar
(CHIRP MEGA DI+ and CHIRP MEGA SI+ models only)
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