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2. RADAR OPERATION
2-3
1. Press the [GAIN] key to show the “gain adjustment” soft keys, and the
last-used adjustment window appears. The example below shows the gain
sensitivity adjustment window. The gain soft keys shown depend on radar
source as shown below.
Model 1800/1900 series
GAIN
ADJUST
GAIN
RETURN
319. 9
°
M
359.9 ˚R
11.70
nm
+
Model 1700 series
GAIN
ADJUST
GAIN
RETURN
12/
H-UP
3nm
LP
359.9 ˚R
11.70
nm
+
A/C
SEA
A/C
RAIN
FTC
A/C
SEA
A/C
RAIN
A/C AT
ON /OFF
12/
H-UP
3nm
LP
319. 9
°
M
GAIN SENSITIVITY
AUTO ROUGH
AUTO MODERATE
AUTO CALM
MAN
0
GAIN SENSITIVITY
AUTO ROUGH
AUTO MODERATE
AUTO CALM
MAN
0
Gain adjustment soft keys
2. Press the GAIN soft key to show the gain sensitivity setting window.
GAIN SENSITIVITY
AUTO ROUGH
AUTO MODERATE
AUTO CALM
MAN
0
Gain sensitivity window
3. Use the trackball to select AUTO ROUGH, AUTO MODERATE, AUTO CALM,
or MAN (manual) as appropriate. Select an AUTO option according to the
sea state.
4. For manual adjustment, rotate the [ENTER] knob to adjust, while observing
the radar echo. The range of adjustment is 0-100.
5. Press the [GAIN] key on the front panel or the RETURN soft key to finish.
Adjusting the FTC (When the radar source is the 1700 series radar)
To suppress rain clutter from heavy storms or scattered rain clutter, adjust the
FTC.
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.
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.