User's Manual Part 2

Operator Manual
3−20
3748DOC020102 Edition: 14.JAN.2005
3.5 Keep the following points in mind when operating the NSC:
• Radar Video
The radar video display area is updated from a memory. The memory is
updated as the antenna scans. The radar picture is signal processed from
previous scan of the antenna. This process is called scan−to−scan integra-
tion. Three scans are required to integrete a target to full brightness. It should
be noted that while in head up, the scan integration process is removed and
all targets including clutter are displayed at full brightness.
• Sensitiveity Controls
When the sensitivity controls are used, the operator must wait for three scans
to see final result. The radar picture will “build” until targets are displayed at a
bright level. Receiver noise and in most cases, clutter, will not be integrated
and will appear dim when the controls are properly set. Adjust the controls in
small increments.
• Radar Detectability
The processing of three scans of radar data results in greater radar detect-
ability. Targets which otherwise would be in noise now stand out clearly.
Greater radar detectability could occasionally cause reflections and other
undesired echos to appear as strong returns. Use the sensitivity controls to
achieve a suitable presentation.
• Best Clutter/Interference Rejection
The best clutter/interference rejection will occur when accurate speed (log)
and gyro information is used to stabilize the radar display. Use the Sea, FTC
and Rain controls to suppress clutter and leave targets at a bright level.