NorthStar 958 Operator's Manual page 143

Chapter 10 - Understanding Radar Functions
Press the NEXT key to display the next page of adjustments.
Press the DONE key to return to the main radar menu keys.
The 958 comes with default factory settings that you can leave
in place. If you turn off the 958, it remembers any changes you
made to these adjustments.
Range Rider function
In many situations, manual adjustments provide better
performance than the 958's automatic settings. But the best
manual settings are often different for each range. Northstar's
exclusive Range Rider function solves this problem for
adjustments to sea clutter, rain clutter, and/or gain. Manually
entered adjustments are stored separately for each range and
automatically applied when the range setting changes. The
effect is a properly set adjustment for each range.
When you first use the radar, you may need to make many
manual adjustments, until the 958 learns the optimum
settings for each range. However, once the 958 learns the
settings, the Range Rider setting may be preferable to either
manual or automatic settings.
Press the keys to adjust the rain clutter, sea clutter, gain, and
Adjust radar page 1
electrical interference.
The RAIN CLUTTER key controls the strength of the clutter
echoes returned from rainfall or snow. You can set the rain
clutter for manual adjustment (by you) or automatic adjust-
ment (by the 958). If you're adjusting the rain clutter manually,
you can change the rain clutter value.
The SEA CLUTTER key controls the strength of the clutter
echoes returned from the ocean surface. You can set the sea
clutter for manual adjustment (by you) or automatic adjust-
ment (by the 958) or automatic adjustment specifically for
harbor areas (by the 958). If you're adjusting the sea clutter
manually, you can change the sea clutter value.
958 Operator's Manual, Rev. A Page 135