Simrad GO XSE Installation Manual page 45

Point the boat to be perpendicular to the very end of a breakwater
or peninsula. Adjust the bearing alignment setting, so that the
heading marker and land mass intersect.
Sidelobe suppression
Occasionally false target returns can occur adjacent to strong target
returns such as large ships or container ports. This occurs because
not all of the transmitted radar energy can be focused into a single
beam by the radar antenna, a small amount energy is transmitted in
other directions. This energy is referred to as sidelobe energy and
occurs in all radar systems. The returns caused by sidelobes tend to
appear as arcs.
Ú Note:
This control should only be adjusted by experienced
radar users. Target loss in harbor environments may occur if this
control is not adjusted correctly.
When the radar is mounted where there are metallic objects near
the radar, sidelobe energy increases because the beam focus is
degraded. The increased sidelobe returns can be eliminated using
the Sidelobe Suppression control.
By default, this control is set to Auto and normally should not need
to be adjusted. However, if there is significant metallic clutter
around the radar, sidelobe suppression may need to be increased.
The control should be adjusted as follows:
1.
Set Radar range to between 1/2 nm to 1 nm and Sidelobe
Suppression to Auto
2.
Take the vessel to a location where sidelobe returns are likely to
be seen. Typically, this would be near a large ship, container
port, or metal bridge.
3.
Traverse the area until the strongest sidelobe returns are seen.
4.
Change Auto sidelobe suppression to OFF then select and
adjust the sidelobe suppression control until the sidelobe
returns are just eliminated. You may need to monitor 5-10 radar
sweeps to be sure they have been eliminated.
5.
Traverse the area again and readjust if sidelobes returns still
occur.
6.
Exit the dialog.
Radar sector blanking (Halo radar only)
Radar installed in close proximity to a mast or structure could cause
unwanted reflections or interference to appear on the radar image.
Software Setup | GO XSE Installation Manual
45