Furuno 1823C manual Gain adjustment soft keys, Gain sensitivity window

2. RADAR OPERATION

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.

12/LP 3nm	319. 9° M
H-UP

￿§GAIN SENSITIVITY

AUTO ROUGH

AUTO MODERATE

￿°AUTO CALM

MAN 0

	3nm	319. 9° M
GAIN	12/LP
ADJUST	H-UP

GAIN

A/C

SEA

A/C

RAIN

￿§GAIN SENSITIVITY

FTC

	AUTO ROUGH
RETURN	AUTO MODERATE
	￿°AUTO CALM
+ 359.9 ˚R	MAN	0
11.70nm

GAIN

ADJUST

GAIN

A/C

SEA

A/C

RAIN

A/C AT ON /OFF

RETURN

+359.9 ˚R

11.70nm

Model 1700 series Model 1800/1900 series

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.

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