Furuno FR-1710 manual Suppressing Second-trace Echoes, Adjusting Brilliance of Screen Data

1.33Suppressing Second-trace Echoes

In certain situations, echoes from very dis- tant targets may appear as false echoes (sec- ond-trace echoes) on the screen. This occurs when the return echo is received one trans- mission cycle later, that is, after a next radar pulse has been transmitted.

To activate or deactivate the second-trace echo rejector:

1.Press the [MENU] key followed by 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 1-43 ECHO SIG menu

2.Press the [6] key to select OFF or ON from the 2ND ECHO field as appropriate.

3.Press the [ENTER/SELECT] key to con- clude your selection followed by the [MENU] key to close the menu.

1.34Adjusting Brilliance of Screen Data

You can adjust relative brilliance levels of various marks and alphanumeric readouts displayed on the screen as follows:

1.Press the [MENU] key.

2.Press the [9] key twice to show the BRILL menu.

BRILL

1. TGT TRAIL

2. CHARACTER

3. HDG LINE

4. EBL/VRM

5. CURSOR

6. MARK

7. PLOT

8. OS SYMB

9.↓ *

* Requires RP-17 Board.

Figure 1-44 BRILL menu

3.Press appropriate numeric key twice to select item to adjust. For example, press the [1] key if you want to change the bril- liance of target trails.

4.Operate the VRM rotary control to adjust brilliance. Current brilliance level is dis- played on the selected item’s bar graph. The adjustment range is as follows;

1.ECHO TRAIL: 10%-50%

2.CHARACTER, 3. HDG LINE: 50%-

100%

4.EBL/VRM, 5. CURSOR, 6. MARK,

7.PLOT, 8. OS SYMB: 0%-100%

5.Press the [ENTER /SELECT] key to con- clude your selection followed by the [MENU] key to close the menu.

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