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GMR 20/40 Owner’s Manual 7
GMR 20/40 OPERATION > THE RADAR ADJUSTMENT MENU
To change the Sea Clutter setting:
1. Using the ARROW KEYPAD, move the slider to a preset or
other position.
2. Press the ENTER key to accept the change.
The preset positions can also be selected using the Soft Key options.
Rain Clutter
Rain Clutter is screen clutter caused by rain. Adjusting the Rain
Clutter setting can help remove screen clutter caused by rain at close
ranges. Selecting Rain Clutter displays the Rain Clutter Adjustment
Slider.
To change the Rain Clutter setting:
1. Using the ARROW KEYPAD, move the slider to the desired
setting.
2. Press the ENTER key to accept the change.
FTC (Fast Time Constant)
Adjusting the Fast Time Constant can help eliminate distant screen
clutter caused by rain. The Fast Time Constant has four presets: Off,
Low, Medium, and High.
To change the FTC setting:
1. Using the ARROW KEYPAD, highlight the desired setting.
2. Press the ENTER key to accept the change.
The FTC settings can also be selected using the Soft Key options.
FTC Menu