Reducing Precipitation Clutter; Adjusting The A/C Rain - Furuno 1833 Operator's Manual

2.6

Reducing Precipitation Clutter

The vertical beamwidth of the antenna is designed to see surface targets even
when the ship is rolling. However, by this design the unit will also detect
precipitation clutter (rain, snow, hail, etc.) in the same manner as normal targets.
Precipitation clutter shows as random dots on the screen.
2.6.1

Adjusting the A/C RAIN

When echoes from precipitation mask solid targets, adjust the A/C RAIN to split
up these unwanted echoes into a speckled pattern, making recognition of solid
targets easier.
1. Press the [GAIN] key.
2. Press the A/C RAIN soft key to show the A/C RAIN window.
3. Rotate the [ENTER] knob to adjust the A/C RAIN. The current level is shown
on the A/C RAIN level bar in the A/C RAIN window, and the range of
adjustment is 0 to 100(%). Do not overadjust – weak targets may be missed.
4. Press the [GAIN] key on the front panel or RETURN soft key to finish.
A/C RAIN
0
A/C RAIN setting window
2. RADAR OPERATION
2-5