Humminbird HELIX 9 Operation Manual page 35

Set up CHIRP (HELIX CHIRP GPS models only)
Use the instructions in this section to set up CHIRP sonar.
Turn on/off CHIRP
To use CHIRP sonar, CHIRP Mode must be turned on. To use traditional 2D sonar, turn off CHIRP Mode and see Select Frequencies
for the 2D View.
NOTE: When CHIRP Mode is turned off, the CHIRP menus are removed from the Main Menu.
1. Main Menu: Press the MENU key twice. Select the Sonar tab.
2. Select CHIRP Mode.
3. Select On or Off. (Default = On)
Adjust CHIRP Frequencies
Use the instructions in this section to select the CHIRP beam frequencies that will be used for the 2D sonar views. You will first select
the CHIRP Display Frequency and then select the start and end frequencies using the CHIRP Frequency Spectrum. The CHIRP Display
Frequency options are determined by the connected CHIRP transducer.
NOTE: CHIRP applies to the down beams only. Side Imaging beams cannot be selected for CHIRP. See Sonar Overview: CHIRP Sonar.
1. Main Menu: Press the MENU key twice. Select the Sonar tab.
2. Select CHIRP Display Frequency.
3. Press the RIGHT or LEFT Cursor keys to select a setting.
4. Press the DOWN Cursor key to select CHIRP Frequency Spectrum.
5. Open the Submenu: Press the RIGHT Cursor key.
6. Press the UP or DOWN Cursor keys to select a frequency menu.
7. Press the RIGHT or LEFT Cursor keys to select a setting.
8. Repeat: Repeat steps 6 through 8 to set additional frequency settings.
9. Close the Submenu: Press the EXIT key.
The frequencies shown in this table apply to the transducer included with your control head.
Frequency HELIX CHIRP GPS
Option Frequency Spectrums
Medium
75 kHz - 95 kHz
Frequency
Medium/High 75 kHz - 95 kHz and
Frequency 175 kHz - 225 kHz
High Frequency 175 kHz - 225 kHz
High Frequency
(455 kHz)
NOTE: Accessory transducers may include additional menu options. For information about accessory transducers, visit our Web
site at humminbird.com.
CHIRP Display Frequency Options and Frequency Spectrums
HELIX CHIRP DI GPS
Frequency Spectrums
X
X
185 kHz - 225 kHz
X 440 kHz - 490 kHz
HELIX CHIRP SI GPS
Frequency Spectrums
75 kHz - 95 kHz
75 kHz - 95 kHz and
175 kHz - 225 kHz
175 kHz - 225 kHz
X
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Select Medium Frequency to
provide deep water returns.
Select Medium/High Frequency
to provide deep water returns.
Select High Frequency to provide
more detail at shallower depths.
Select High Frequency (455 kHz) for
the most detail at shallow depths.
Set up Sonar