Menu Functions
The Sensitivity function controls the
sensitivity of the sonar receiver. The
ProAngler 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 biasing this
Sensitivity adjustment either higher or
lower based on personal preference.
You can select one of 11 sensitivity
bias settings from -5 to +5. A bias
setting of 0 (Factory Setting) has no effect on the automatic sensitivity control. Increasing the bias
(+1 t5) causes 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 advantageous to reduce the sensitivity bias. 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 desirable to increase the sensitivity bias 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 bias, or the DOWN
ARROW to reduce sensitivity bias. By holding either ARROW button depressed, the unit will
sequence through the available settings until you release the button or the end of the adjustment
range is reached. If additional time is needed to study a menu, press and hold the MENU button
and the menu will remain on-screen indefinitely.
If a setting limit is reached, the ARROW symbol attached to the menu appears to be hollow which
indicates that the related button has no further function. Also, the audible "error" consisting of
multiple chirps will be heard.
After an adjustment is made, the menu disappears and the new sensitivity setting begins to affect
new sonar information as it flows on-screen. If additional adjustment is needed, the UP ARROW
or DOWN ARROW can be pressed without having to first press MENU.
Depth Range
The Depth Range function controls the vertical distance displayed
on the graphic area of the display. There are 9 different depth
ranges available. The top of the range is always 0, or the surface
of the water. Ranges of 0-15', 0-30', 0-60', 0-120', 0-180' , 0-240' ,
0-360' , 0-480' , and 0-600' are available. The range which
positions the bottom depiction closest to the bottom of the graphic
area of the display, will best utilize the available display
resolution.
The ProAngler automatically adjusts the depth range depending on the depth of the water. The
unit tries to maintain the bottom depiction about 2/3 down the total range (for example, in 20' of
