Humminbird HELIX Series Operation Manual page 41

Select a Frequency for the Down Imaging View
Use the instructions in this section to choose a frequency that will be used for the Down Imaging View. The menu options are
determined by the installed transducer and control head model.
NOTE: You can also change the frequency in the Down Imaging View while you fish by pressing the CHECK key (see the Down
Imaging section: Adjust Settings While you Fish).
frequency
label
Select a Frequency for the Down Imaging View
1. Main Menu: Press the MENU key twice. Select the Sonar tab.
2. DI Models: Select Imaging Display Frequency.
CHIRP DI, CHIRP MEGA, CHIRP MEGA+ Models: Select DI CHIRP Display Frequency.
3. Select a frequency.
For details, see the tables in Understand Transducer Frequencies and refer to your transducer model.
(optional)
Display Frequency for the Down Imaging View (HELIX 9 CHIRP DI GPS G2N)
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Set up Sonar