6
GMR 21/41 Owner’s Manual
GMR 21/41 O
PERATION
>
T
HE
R
ADAR
A
DJUSTMENT
M
ENU
To change a Radar Adjustment Menu setting:
1. Press
ADJ/MENU
to display the Adjustment Menu.
2. Use the
Rocker
or
Data Entry
keys to select an option. Press
ENTER
to display the adjustment for that selection.
3. Use the
Rocker
to change the current setting. Press
ENTER
to accept the change.
Gain
Selecting
Gain
displays the Gain adjustment slider. When
Auto
is selected, the scanner’s gain is automatically adjusted to provide
optimal performance. Manually adjusting the gain increases or
decreases the receiver’s sensitivity. Increasing the gain may help to
show a distant target, but may also increase screen clutter.
To change the Gain setting:
1, Use
the Rocker
to move the slider up or down.
2. Press
ENTER
to accept the change.
To return the Gain setting to
Auto
, move the slider to the
Auto
position, or press the
Auto
soft key.
Sea Clutter
Adjusting the Sea Clutter setting can help eliminate any unwanted
screen clutter caused by choppy sea conditions. Selecting
Sea Clutter
displays the Sea Clutter adjustment slider. The slider has three preset
positions:
Calm
,
Moderate
, and
Rough
.
Summary of Contents for GMR 21
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