Lowrance electronic LCX-17M - Manual (Page 65)

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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 this unit, auto mode will let you increase
sensitivity to 100 percent, but the unit will limit your minimum setting.
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
adjustments to the sensitivity level, with a bias toward the setting you
selected.
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 this unit, manual mode allows you to set sensitivity at
100 percent (maximum) or zero percent (minimum.) Depending on
water conditions, the bottom signal may completely disappear from the
screen when you reduce sensitivity to about 50 percent or less!
Try adjusting sensitivity in both auto and manual modes to see how
they work.
To adjust sensitivity:
1. Press MENU|ENT.
2. The Sensitivity Control Bar appears. Press ↓ to decrease sensitivity;
press ↑ to increase sensitivity. When it's set at the desired level, press
EXIT . (When you reach the maximum or minimum limit, a tone sounds.)
Sonar Menu with Sensitivity command selected (left). The Sensitivity
Control Bar (right).
NOTE:
If you want to change the sensitivity in Manual Mode, first turn off
Auto Sensitivity: from the Sonar Page, press
MENU|
↓ to A
UTO
S ENSITIVITY
| ENT|
↑ to S ENSITIVITY
| ENT. Press ↓ or ↑ to pick a different
sensitivity setting. When it's set at the desired level, press EXIT .