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Menu Functions
Sensitivity. The Sensitivity function controls
the sensitivity of the sonar receiver. The
105SX automatically adjusts the level of
receiver sensitivity based on a number of
factors including the depth of the water
and the level of noise present. Noise can be
caused by other electronic devices, engines,
trolling motors, propeller cavitation and
hydrodynamic flow among others.
The user has the option of adjusting
the Sensitivity higher or lower based
on personal preference. You can select
one of 11 sensitivity settings from -5
to +5. A setting of 0 (factory setting)
has no effect on the automatic
sensitivity control. Increasing the
sensitivity (+1 through +5) enables the
unit to display the information from
progressively smaller sonar returns. By
decreasing the sensitivity bias (-1
through -5), the unit effectively filters
small sonar returns.
In murky or muddy water, it is often
helpful to reduce the sensitivity. This
prevents the display from being
cluttered with sonar returns from debris or suspended particles. In very
clear or very deep water, it may be helpful to increase the sensitivity since
even the smallest sonar return may be of interest to the user.
To adjust Sensitivity, press MENU repeatedly until the Sensitivity heading is
displayed. When the Sensitivity menu appears, use the UP ARROW to
increase the sensitivity, or the DOWN ARROW to reduce sensitivity. To
sequence through the available settings, press and hold either ARROW
button. Release the button at the setting you want to change.
14
USING THE 105SX
MENU FUNCTIONS
(+)High Sensitivity (-)Low Sensitivity
Sensitivity at “0”