Furuno FR-1710 manual Video Contrast, Clutter Sweep, Outputting Target Position

1.40 Video Contrast

The video contrast is adjustable in three lev- els according to the radar video sampling level. Select the level so that the video con- trast feature changes the dynamic range of the video signal to improve picture contrast. Picture shows up most clearly from the back- ground.

1.Press the [MENU] key.

2.Press the [5] key twice to display the ECHO SIG menu.

	ECHO SIG
1.	TGT COLOR	YEL			GRN	COLOR
2.	ECHO AVG	OFF			0.5	1 2 3
3.	INT REJ	OFF			1 2	3
4.	N REJ	OFF			ON
5.	ENHANCE	OFF			ON
6.	2ND ECHO	OFF			ON
7.	CONTRAST	1	2		3
8.	CLTR SWEEP	OFF		ON(LINK) ON(FIX)
9.	SWEEP LVL	1	2		3
0. CNTR ENHANCE		OFF			ON

Figure 1-51 ECHO SIG menu

3.Press the [7] key to select desired con- trast level from the CONTRAST field.

4.Press the [ENTER/SELECT] key to reg- ister you selection and the [MENU] key to finish.

1.41 Clutter Sweep

The clutter sweep feature suppresses sea and rain clutters within the trackball-selected area, to discriminate specific targets from noise. The user may select the area to pro- cess and the level of suppression to apply as follows:

1.Press the [MENU] key.

2.Press the [5] key twice to select the ECHO SIG menu.

3.Press the [8] key to turn on/off the clutter sweep function, and then press the [EN- TER/SELECT] key.

OFF: Turns off clutter sweep feature.

ON(LINK): Sweep area moves with trackball operation. Sweep cursor shown by dashed lines.

ON(FIX): Sweep area is fixed on the screen. Sweep cursor shown by solid lines.

4.Press the [9] key (SWEEP LVL) several times to select level of suppression to use; “3” provides the highest level of noise sup- pression.

5.Press the [ENTER/SELECT] key to reg- ister your selection and the [MENU] key to finish.

6.Operate the trackball to select area to pro- cess.

Select area to process with square cursor.

Figure 1-52 Selection of area to process with clutter sweep

The clutter sweep feature may also be acti- vated by a user key.

1.42 Outputting Target Position

Target position can be output (in IEC 61162- 1 format) to a video plotter and marked on its screen with a symbol. Select target with the trackball and push the A/C RAIN control. (TLL) This function requires position data and compass signal.

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