Installation manual

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Software setup | NSO-II Installation Manual
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.
¼ Note: This control should only be adjusted by experienced radar users. Target loss in harbour
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 in the Radar installation menu.
By default this control is set to Auto and normally should not need to be adjusted. However
if there is signifi cant metallic clutter around the radar, sidelobe suppression may need to be
increased. The control should be adjusted as follows:
• Set Radar range to between 1/2 nm to 1 nm and Sidelobe Suppression to Auto.
• 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
• Traverse the area until the strongest sidelobe returns are seen.
• 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.
• Traverse the area again and readjust if sidelobes returns still occur.
• Exit the installation menu.
Restore radar to Factory Default
This can be used to revert all user adjustments.
Video In con guration
Press the menu key when on the video page or panel to open
the setup dialogue.
Enable PAL or NTSC depending on the video ouput standard
of the selected camera.
You can optimize the video display by adjusting the video
image settings (brightness, saturation, etc.). The settings are
applied individually for each video source.
Mirror image may be applied where the camera is providing
a rear view, and the user wishes to see objects as they would
appear in a vehicle rearview mirror, ie, on the same side as
they actually are.
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NSO-II_IM_EN_988-10392-001.indd 20 9/07/2013 3:54:20 p.m.