B&G Zeus2 Glass Helm CPU - Manual (Page 61)

Adjusting the radar image
You may be able to improve the radar image by adjusting the radar sensitivity, and by
filtering out the random echoes from sea and weather conditions.
The radar control images are located in the upper right corner of the radar panel. You select
between the control images by selecting the control image or by pressing the rotary knob
on an ZC1. Active control will expand and display its name in full. You can then adjust the
value by using the slide bar or by turning the rotary knob on the ZC1.
You can also adjust the image settings from the radar menu.
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 a manual and an automatic mode. You toggle between automatic and manual
mode in the slide bar, or by pressing and holding the rotary knob.
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.
The system includes predefined Sea clutter settings for habor and offshore conditions, in
addition to the manual mode where you can adjust the settings. You select Sea clutter
modes from the menu, or by a long press on the rotary knob. You can only adjust the Sea
clutter value 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 not to miss weak targets, the interference rejection should be set low when no
interference exists.
The radar interference rejection option is available from the menu.
Radar | Zeus 2 Glass Helm 61