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Software setup | NSO evo2 Installation Manual
Software version
Check to make sure you have the latest software. Check website for the latest version;
www.simrad-yachting.com
Serial Number
This number should be recorded for support and insurance purposes.
MARPA status
The MARPA status can identify if a heading sensor is on the network and that the radar is
receiving heading information essential for MARPA calculations.
Reset device ID
The fi rst generation NSS only supports one radar on the network. Should a radar be
connected, that has been connected to a dual radar network in the past, it may not be
detected by the NSS because it may have an invalid Device ID. With the radar connected and
powered up, select the Reset Device ID button to resolve this problem.
¼ Note: This procedure must be performed with only one radar on the network, and only ap-
plies where a network combines NSS with NSO evo2.
Adjust range o set (pulse radar only)
The timing of the transmit and receive circuits can be adjusted to determine zero range.
Position the vessel stationary about 150-200 m from a straight jetty or sea wall. Set the radar
to 1/8 nm. If the sea wall appears bent or bowed adjust until the wall appears straight
Adjust antenna height
Set the radar scanner height relative to the water surface. The Radar uses this value to
calculate the correct STC settings.
Adjust bearing alignment
This is to align with the heading marker on the screen with the center line of the vessel, this
will compensate for any slight misalignment of the scanner during installation. Any inaccuracy
will be evident when using MARPA or chart overlay.
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.
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
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