B&G Zeus2 series, Operator'S Manual

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This mode automatically works when GAIN = AUTO and SEA = HARBOR or OFFSHORE. The
purpose is to allow smaller vessels to be seen in the leeward direction of the sea clutter. The
GAIN of the radar receiver is increased dynamically during the sweep, in the leeward
direction, for increased target sensitivity in heavier sea states.
When GAIN or SEA = MANUAL, the Directional Clutter Rejection mode will be OFF (non-
directional).
In addition, CALM, MODERATE or ROUGH STC Curve settings are available in the Radar
options menu to better optimize the radar image to your liking.
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
is reduced.
The system includes predefined Sea clutter settings for harbor 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
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.
Advanced radar options
Noise Rejection
(Broadband 4G radar only)
The Noise Rejection control sets the amount of noise filtering applied by the radar. Target
sensitivity is increased at longer ranges when this control is set to Low or High, but does
cause some loss of target discrimination.
Tip:
To get maximum range performance from Broadband 4G Radar, transmit on one range
only, set the Noise Reject control to High and the threshold as low as possible. The default is
30% for less clutter on the screen. If OFF is selected for the Zeus
2
, the range performance is
about equal to 3G radar. In some areas where extreme high interference may exist, try OFF
for best radar image.
Radar threshold
The threshold sets required signal strength for the lowest radar signals. Radar returns below
this limit are filtered and are not displayed.
Default value: 30%.
Target expansion
Target expansion increases the length of targets in range, making them easier to see.
Rejecting radar interference
Interference could be caused by radar signals from other radar units operating in the same
frequency band.
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Radar | Zeus2 Operator Manual