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USING THE 200DXUSING THE 200DX
MENU FUNCTIONS
Menu Functions
Sensitivity. The Sensitivity function controls the sensitivity of the
sonar receiver. The 200DX 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 or 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.