Furuno GD-1700C - Manual (Page 100)

3. RADAR OPERATION
3-6
3.6.2 Adjusting the FTC
To suppress rain clutter from heavy storms or scattered rain clutter, adjust the
FTC, which is available with the Model 1700 series network radar. The FTC
splits up these unwanted echoes into a speckled pattern, making recognition of
solid targets easier.
Note:
In addition to reducing clutter, the FTC can be used in fine weather to
clarify the picture when navigating in confined waters. However, with the
circuit active the receiver is less sensitive. Therefore, turn off the FTC, by
setting it for “0”, when its function is not required.
1. Press the [GAIN] key.
2. Press the FTC soft key to show the FTC window.
FTC
0
FTC setting window
3. Rotate the [ENTER] knob to adjust. The range of adjustment is 0-100(%). Do
not overadjust the FTC – weak target echoes may be missed.
4. Press the [GAIN] key on the front panel or RETURN soft key to finish.