USING THE TRACKER UNIT
MENU FUNCTIONS
Sensitivity. The Sensitivity function controls 
the sensitivity of the sonar receiver. The Tracker 
unit automatically adjusts the level of receiver 
sensitivity based on a number of factors includ- 
ing 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 sen- sitivity control. Increasing the sensitivity (+1 through +5) enables the unit to display the information from progressively smaller sonar returns. By decreasing the sensitivity bias
In murky or muddy water, it is often helpful to reduce the sensitivity. This prevents the display from being clut-
tered 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 set- tings, press and hold either ARROW button. Release the button at the set- ting you want to change.
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