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Using radar | 35
Optimizing the radar image
You may be able to improve the radar
image by adjusting the radar sensitivity,
and by filtering the signals from effect
of random echoes from sea and weather
conditions.
The parameters are adjusted by using
the rotary knob. You select between the
control images by pressing the rotary
knob. Active control will expand and
display its name in full. You can then
adjust the value by turning the knob
Gain
The gain controls the sensitivity of the radar receiver.
A higher gain makes the radar more sensitive to radar returns, allowing it to display
weaker targets. If the gain is set too high, the image might be cluttered with background
noise.
Gain has 2 modes; Auto and Manual. You cycle through the modes by pressing and
holding the rotary knob. You can only adjust the gain value by turning the rotary knob
when it is in manual mode.
Sea clutter
Sea clutter is used to filter the effect of random echo returns from waves or rough water
near the vessel.
When you increase Sea Clutter filtering the on-screen clutter caused by the echoes of
waves will be reduced.
Sea clutter has 3 modes: auto harbor, auto offshore and manual. A long-press on the
rotary knob will cycle through the modes. You can only adjust the clutter value by
turning the rotary knob when it is in manual mode.
Rain Clutter
The Rain clutter is used to reduce the effect of rain, snow or other weather conditions on
the radar image.
The value should not be increased too much as this may filter out real targets.
Rejecting radar interference
Interference could be caused by radar signals from other radar units operating in the
same frequency band.
A high setting will reduce the interference from other radars.
In order to not miss weak targets, the interference rejection should be set low when no
interference exists.
Target boost
This feature increases the size of radar targets, making them easier to see on the radar
panel.
Setting the radar threshold
The threshold sets required signal strength for the lowest radar signals. Radar returns
below this limit will be filtered and not displayed.
Default value: 30%.
MENU WIN
36


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