40
Set up Sonar
Adjust 2D CHIRP (CHIRP models only)
You can use the settings included with your control head, or you can adjust the CHIRP downbeam frequencies that will be used for
the 2D Sonar Views.
Turn on/off 2D CHIRP
To use CHIRP sonar, 2D CHIRP Mode must be turned on. To use traditional 2D sonar, turn off 2D CHIRP Mode and see
Select
Frequencies for the 2D View
.
NOTE:
When 2D 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 2D CHIRP Mode.
3. Select On or Off. (Default = On)
Adjust 2D CHIRP (optional)
You can use the settings included with your control head, or you can adjust the CHIRP downbeam frequencies that will be used for
the 2D Sonar Views. You will first select the 2D CHIRP Display Frequency and then select the start and end frequencies using the
2D CHIRP Frequency Spectrum. The 2D CHIRP Display Frequency options are determined by the connected CHIRP transducer.
NOTE:
The instructions in this section adjust the down beams only. To adjust the frequencies for Down Imaging or Side Imaging Views,
see
Adjust Imaging CHIRP
.
1.
Main Menu:
Press the MENU key twice. Select the
Sonar
tab.
2. Select 2D CHIRP Display Frequency.
3. Press the RIGHT or LEFT Cursor keys to select a setting.
4. Press the DOWN Cursor key to select 2D 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 adjust the Start Frequency and End Frequency for each beam.
9.
Close the Submenu:
Press the EXIT key.
NOTE:
Accessory transducers may include additional menu options. For information about accessory transducers, visit our Web
site at
humminbird.com
.
2D CHIRP Display Frequency Options and Frequency Spectrums
The frequencies shown in this table apply to the transducer included with your control head.
Frequency
Option
HELIX CHIRP GPS G2
Frequency Spectrums
HELIX CHIRP DI GPS G2
Frequency Spectrums
HELIX CHIRP SI GPS G2
Frequency Spectrums
Medium
Frequency
75 kHz - 95 kHz
X
75 kHz - 95 kHz
Select Medium Frequency to provide
deep water returns.
Medium/High
Frequency
75 kHz - 95 kHz and
175 kHz - 225 kHz
X
75 kHz - 95 kHz and
175 kHz - 225 kHz
Select Medium/High Frequency to
provide deep water returns.
High Frequency
175 kHz - 225 kHz
185 kHz - 225 kHz
175 kHz - 225 kHz
Select High Frequency to provide
more detail at shallower depths.
High Frequency
(455 kHz)
X
440 kHz - 490 kHz
X
Select High Frequency (455 kHz) for
the most detail at shallow depths.
