Humminbird HELIX 5 SERIES Operation Manual page 88

Sensitivity controls how much detail is shown on the display and will adjust the sensitivity of all
sonar frequencies.
Decrease the sensitivity to eliminate the clutter from the display that is sometimes present in
murky or muddy water. If Sensitivity is adjusted too low, the display may not show many sonar
returns that could be fish.
When operating in very clear water or greater depths, increase the sensitivity to see weaker
returns that may be of interest. If the sensitivity is adjusted too high, the display may become too
cluttered.
Sensitivity at Low
NOTE: The Sensitivity setting is a global setting and will adjust the sensitivity of all sonar frequencies.
Upper Range sets the shallowest depth range that will be displayed on the Sonar, Split Sonar,
and Active Sonar Side Views. Upper Range is often used with Lower Range.
For example, if you are only interested in the area between 20 and 50 feet deep, you should
set the Upper Depth Range to 20 and the Lower Depth Range to 50. The Sonar View will then
show the 30 foot area between 20 and 50, and will not show the surface or the bottom
(assuming the bottom is deeper than 50 feet), and will show greater detail for that area
between 20 and 50 feet.
NOTE: A minimum distance of 10 feet will be maintained between the Upper and Lower Range
regardless of the manual settings entered.
The available Upper Range settings are determined by your Humminbird model as follows:
• HELIX SONAR GPS: 0 to 1490 ft, 0 to 497 m (International Models only); Default = 0
• HELIX DI GPS: 0 to 590 ft, 0 to 237 m (International Models only); Default = 0
• HELIX XD GPS: 0 to 2490 ft, 0 to 757 m (International Models only); Default = 0
Sonar X-Press Menu
Sensitivity
Settings: Low = 1, High = 20; Default = 10
Sensitivity at Medium
Upper Range
(Advanced: Sonar, Split Sonar, and Active Sonar Side Views only)
Settings: Various, see below.
82
Sensitivity at High