NorthStar 972 Quickstart Manual And Reference Manual page 96

Reference section 6 — Radar
92
Using the Adjustment keys
immediately after the cursor pad is
released), or
using the numeric keys on the
•
keypad to enter the value
Image adjustments
Press the keys to adjust the gain, sea
clutter, rain clutter, or interference
rejection.
When pressed, the keys turns red to
indicate it is active and its value can be
adjusted.
is a Northstar exclusive feature,
Range Rider
strongly recommended when manual
settings are required. The user can freely
make any needed gain and clutter adjust-
ments, and these settings are
"remembered" for each range. When the
range is selected again, the last-used gain
and clutter settings for that range is reap-
plied. can be selected on the
Range Rider
screen.
Radar Options
Gain controls the strength of all echoes,
and should be adjusted for a pleasing and
useful image. Higher values display
brighter echoes.
Gain can be set to automatic or manual
mode. Press the activated
switch modes. The gain setting can be
entered on the keypad or by using the
cursor pad. Manual settings range from 0
to 99. Manual gain adjustments will be
different for each range scale. Longer
ranges generally require more gain.
If speckling appears on the screen, you
may wish to decrease the gain a bit or
increase the sea clutter setting.
Sea Clutter controls the strength of the
clutter echoes returned from the ocean
surface. Higher values suppress more
clutter.
Sea Clutter can be set to automatic or
manual mode. Press the activated
clutter
setting can be entered on the keypad or by
using the cursor pad. Manual settings
range from 0 to 99.
Rain Clutter controls the strength of the
clutter echoes returned from rain or fog.
Higher values suppress more clutter.
Press the activated
switch modes. The rain clutter setting can
be entered on the keypad or by using the
cursor pad. Manual settings range from 0
to 99.
Interference rejection. Certain types of
interference (for example, from radars on
other vessels) can be lessened by using the
interference rejection filter. Select Off, 1
key to
Gain
(low), 2 (medium), or 3 (high).
key to switch modes. The sea clutter
Rain clutter
Sea
key to
Northstar 972