Eagle Electronics 240 SONAR User Manual


 
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Adjusting sensitivity in Auto Sensitivity Mode is similar to manually
adjusting a car's speed with the accelerator pedal while cruise control is
on. You can tell the car to run faster, but when you let off the gas the
cruise control automatically keeps you from running slower than the
minimum speed setting. In your unit, auto mode will let you increase
sensitivity to 100 percent, but the unit will limit your minimum set-
ting. This prevents you from turning sensitivity down too low to allow
automatic bottom tracking. When you change the setting with auto
turned on, the unit will continue to track the bottom and make minor ad-
justments to the sensitivity level, with a bias toward the setting you se-
lected.
Adjusting sensitivity in Manual Sensitivity Mode is similar to driving a
car without cruise control — you have complete manual control of the
car's speed. In your unit, manual mode allows you to set sensitivity at
100 percent (maximum) or zero percent (minimum.) Depending on wa-
ter and bottom conditions, the bottom signal may completely disappear
from the screen when you reduce sensitivity to about 20 percent or less!
Try adjusting sensitivity in both auto and manual modes to see how
they work.
Sensitivity menu screens. Left, automatic or manual menu.
Right, Sensitivity Adjustment menu.