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Lowrance GlobalMap 2000 Manual

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The SONAR key allows quick changes between sonar screens, each of
which can be customized to your needs.
AUTOMATIC
The automatic feature is enabled when the unit is first turned on. This
feature adjusts the sensitivity and range so the bottom signal shows in the
bottom half of the display at all times. The word “AUTO” appears at the top
of the screen when the automatic feature is on.
Note: You can adjust the sensitivity, and to a lesser extent, the range at any
time simply by pressing the arrow keys. The left and right arrow keys
control the sensitivity while the up and down arrow keys control the range.
When automatic is on, however, the amount of adjustment is limited.
To turn automatic off, press the
MENU key, then press the key
next to the “Sonar Controls ...”
label. Now press the key adja-
cent to the “Auto Man.” label.
This moves the check mark
from the “Auto” box to the “Man”
box. Now press the CLR key.
The menus disappear and the
full screen sonar shows. The
letters “MAN” at the top of the
screen signifies that the unit is
in the manual mode. You can now make any changes or adjustments to the
sonar as desired.
Repeat the above steps to turn automatic on.
SENSITIVITY
The sensitivity level controls the unit’s ability to detect echoes. Low
sensitivity excludes much of the bottom information, fish signals, and other
target information. High sensitivity levels let you see this detail, but it can
also clutter the screen with many undesired signals. Typically, the best
sensitivity level shows a good, solid bottom signal with Grayline and some
surface clutter. The unit adjusts the sensitivity when the automatic mode
is on, keeping a solid bottom signal displayed, however this may not be the
best level for all situations.
You can change the sensitivity level at any time by simply pressing the left
or right arrow keys. When either key is pressed, a small menu appears in
the bottom left corner of the display. This menu shows the sensitivity level
… 72 …


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