15
USING THE 450TX
MENU FUNCTIONS
Several of the menus are multi-step. In some situations if an adjustment is
made, additional options become available for further adjustment.
Examples of these multi-step menus are Depth Range, Depth Alarm and
Zoom. See the detailed description of each function for further
explanation.
Menu Functions
Sensitivity.
The Sensitivity function controls the
sensitivity of the sonar receiver. The 450TX
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 t5) enables the
unit to display the information from progressively smaller sonar returns. By
decreasing the sensitivity (-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.
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Up Arrow Option
Down Arrow Option
Arrow Symbols
Selected Setting
Range of Adjustment Indicator
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