Humminbird HELIX Series Operation Manual page 43

Understand Transducer Frequencies
2D Models
XNT 9 HW T
XNT 9 HW
XP 9 HW T
XP 9 HW
XTM 9 HW T
XPTH 9 HW T
XPT 9 HW T
2D Display
25˚
42˚
Dual Spectrum Cone Angles
DI Display
75° 75° 75°
455kHz/
MEGA
MEGA DI Cone Angles
DI+ Display
45° 45° 45°
800kHz
75° 75° 75°
455kHz/
MEGA+
MEGA DI+ Cone Angles
High Wide Transducers
MEGA DI Models
XNT 9 MDI T
XNT 9 HW MDI 75 T
XNM 9 HW MDI 75 T
Full
Narrow
Wide
MEGA
455 kHz
MEGA+
800 kHz
455 kHz
MEGA DI+ Models
XM 9 HW MDI T
XTM 9 HW MDI T
Select Full Beam (default) to use the complete frequency range.
Select Narrow Beam for increased bottom detail and better target
separation.
Select Wide Beam to maximize coverage and show big, clearly
defined fish arches.
Select MEGA for the highest resolution, sharpness, and depth (up
to 125 ft).
*For MEGA SI models, the range is up to 75 ft.
Select 455 kHz for deep water and overall coverage (up to 350 ft).
Select MEGA for the highest resolution, sharpness, and depth (up
to 200 ft).
Select 800 kHz as an alternative frequency with sharp returns (up
to 125 ft).
Select 455 kHz for deep water and overall coverage (up to 400 ft).
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MEGA SI Models
XNT 9 HW MSI 150 T
XTM 9 HW MSI 150 T
MEGA SI+ Models
XM 9 HW MSI T
XT M 9 HW MSI T
XPTH 9 HW MSI T
Set up Sonar