Furuno WR2120 Operator's Manual page 44

4) SRHI screen:
・ 90 degrees screen (Displays SRHI echo at 90 degrees on sub screen)
・ 180 degrees screen (Displays SRHI echo at 180 degrees on sub screen )
5) Invalid data area:
Turn ON/OFF the invalid data area indication.
6) Signal shading area:
Select the signal shading area indication.
OFF: Hidden, 1: Grayed out, 2: Gray scale
7) Signal extinction area:
Select the signal extinction area indication beyond the strong rain area.
OFF: Hidden, 1: Grayed out, 2: Gray scale
8) Ground clutter rejection area:
Select the ground clutter rejection indication area.
OFF: Hidden, 1: Grayed out, 2: Gray scale
9) Ground clutter rejection level:
Select the level of ground clutter rejection, 0 to 7.
10) Pulse blind area:
Select the pulse blind area indication zone.
OFF: Hidden, 1: Grayed out, 2: Gray scale
11) Sector blank:
Select the sector blank indication.
OFF: Hidden, 1: Grayed out, 2: Gray scale
12) Clear:
Rain file data will be cleared from screen.
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