10
AUTOMATIC
When the Optima is first turned on,
the Automatic feature is enabled. This
is indicated by the word “AUTO” at the
top of the screen. The Automatic fea-
ture adjusts the sensitivity and range
so the bottom signal is displayed in the
lower half of the screen at all times.
To turn Automatic off, first press the
MENU key, then press the up or down
arrow keys until the "AUTO" menu
appears. Press the left arrow key to
switch to the manual mode. The letters “Man” appear at the top of the
screen, indicating the unit is in the manual mode. To turn Automatic on,
repeat the above steps to get the auto menu, then press the right arrow
key.
SENSITIVITY
The sensitivity controls the ability of the unit to pick up echoes. A low
sensitivity level excludes much of the bottom information, fish signals, and
other target information. High sensitiv-
ity levels enables you to 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.
When the Optima is in the Automatic
mode, the sensitivity is automatically
adjusted to keep a solid bottom signal
displayed, plus a little more. This gives
it the capability to show fish and other
detail.
However, situations occur where it becomes necessary to increase or
decrease the sensitivity. This typically happens when you wish to see more
detail, so an increase in sensitivity is indicated. The procedure to adjust it
is the same whether the unit is in the automatic or manual mode.
To adjust the sensitivity, press the MENU key, then press the up or down
arrow keys until the "SENS" menu appears as shown above.
