NorthStar 6000i Installation Manual page 38

SECTION FIVE: Using manual control functions
The modes of rain clutter and sea clutter are always locked together: if the user sets one to manual,
the other automatically switches to manual, and vice-versa.
Even when an automatic mode (Auto1, Auto2, or Harbor) is selected, any clutter or gain setting can
be overridden manually by pressing the key once to activate it, and pressing a second time to switch
its function from auto to manual. Then, a value can be set using the cursor pad or the keypad.
Rain Clutter
Enter the rain clutter setting on the keypad or by using the cursor pad. Manual settings range from 0
to 99. Higher settings suppress more rain echoes.
Sea Clutter
Enter the sea clutter setting on the keypad or by using the cursor pad. Manual settings range from 0
to 214. Higher settings suppress more sea clutter echoes.
Gain
Enter the gain setting on the keypad or by using the cursor pad. Manual settings range from 0 to
299. Higher settings display more echoes.
Manual gain adjustments will be different for each range scale. Longer ranges generally require more
gain. Using the Range Rider function described above minimizes the need for frequent adjustments.
Other adjustments
Sea state
The Sea State control is only available when the radar's Mode is set to Range Rider. Sea State adjusts
the sea clutter up or down slightly to correspond with the expected echoes from whitecaps and
breaking waves. The normal or "0" setting applies no changes, and is used when the sea state is the
same as when the settings were entered. Positive numbers are used when the sea is rougher, and
negative numbers when the sea state is calmer.
For safety reasons, the Sea State is automatically set back to "0" each time the unit is turned on.
To set the Sea State (when in Range Rider mode):
1. From the main radar screen, press Page 2 and Page 3 .
2. Press Sea State .
3. Use the cursor pad to enter a new number.
4. Press Done to return to the main radar screen.
Page 34 Radar Installation Manual, Rev. E1