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To adjust Sensitivity, press
MENU
until the
S
ENSITIVITY
A
DJUSTMENT
menu appears. Press
UP ARROW
to increase the sensitivity,
DOWN ARROW
to decrease it. When it's set at the desired level,
press
PWR
to clear the menu.
NOTE:
If you want to change the sensitivity in Manual
Mode, first turn off Auto Sensitivity: press
MENU
until the
S
ENSITIVITY
A
UTOMATIC
/M
ANUAL
menu appears.
Press
DOWN ARROW
to select
M
ANUAL
, then press
PWR
to
clear the menu. To adjust the sensitivity, follow the same
steps used for adjusting sensitivity in auto mode above.
Grayline
®
Grayline
®
lets you distinguish between strong and weak
echoes. It "paints" gray on targets that are stronger than a
preset value. This allows you to tell the difference between a
hard and soft bottom. For example, a soft, muddy or weedy
bottom returns a weaker signal which is shown with a
narrow or no gray line. A hard bottom returns a strong
signal which causes a wide gray line.
To change the Grayline level, press
MENU
until the
G
RAYLINE
menu appears.
At left, little Grayline indicates a soft bottom, probably sand or mud.
At right, the wider Grayline indicates a harder, rocky bottom.
Press
UP ARROW
to increase the level or press
DOWN ARROW
to
decrease it. The percentage of Grayline in use shows in this menu.
Echoes scrolling onto the screen will also show the effects of the
Grayline change. If you reach the maximum or minimum level, a tone
sounds alerting you to the limits. Press
PWR
to clear the menu.
Wider
Grayline
®
Thin or no Grayline
®