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GMR 404/406 Owner’s Manual 5
bAsIc oPerAtIon > rAdAr PAge
FTC (Fast Time Constant)
FTC controls unwanted screen clutter caused by rain at a distance. The
Fast Time Constant has four settings: Off, Low, Medium, and High.
Zoom
Zoom allows you to zoom in on a selected area of the radar screen.
When you select a zoom range, a window showing a zoomed portion
of the screen appears in the lower-left corner and a selection box
appears. To view different areas at the selected zoom range, open
the Radar adjustment menu, and then press the Move soft key. Use
the ROCKER to move the selection box. The Zoom setting has four
settings: Off, 2x, 4x, and Move.
Zoom view
Selection box
Target Expansion
Use Target Expansion to increase the size of a target. Select On or
Off.
NOTE: The Target Expansion setting has no effect at range scales
of 4 nm or greater.
Target Expansion Off Target Expansion On