Furuno 1932, 1942 Suppressing Radar Interference, Select OFF deactivate at Echo Trail on the menu

Continuous trail

The maximum continuous trail time is 99 min- utes and 59 seconds. When the elapsed time clock counts up to that time the elapsed time display is reset to zero and trail begins again.

Cancelling echo trail

Select “OFF (deactivate)” at “ECHO TRAIL” on the menu.

Changing trail attributes

Trail gradation and trail time can be selected on the OTHERS menu.

Table 3-1 Trailing attributes

Item in
OTHERS		Description
menu
	Trails can be shown in
	single or multiple
	gradations. Multiple paints
	trails getting thinner with
Trail	time just like the afterglow
	on an analog PPI radar.
Tone
		Single	Multiple
	Trail time can be set for 15
	sec., 30 sec., 1 min., 3 min.,
Trail Time	6 min., 15 min., 30 min., or
	continuous.

3.5Suppressing Radar Interference

Radar interference may occur when near an- other shipborne radar operating in the same frequency band as your radar. Its on-screen appearance is many bright dots either scat- tered at random or in the form of dotted lines extending from the center to the edge of the display. Figure 3-5 illustrates interference in the from of curved spokes. Interference ef- fects are distinguishable form normal echoes because they do not appear in the same place on successive rotations of the antenna.

Figure 3-5 Radar interference

Four levels of interference are available, in- cluding off; IR1, IR2, IR3 and OFF. IR3 pro- vides the highest level of rejection.

1.Press the [MENU] key.

2.Select “OTHER MENU” and press the [ACQ/ENTER] key.

[ OTHERS ]

Select item by omnipad

		and press ENTER key.
¡. Panel Dimmer			1			2			3		¢
2	. Mark Brill		1			2			3		¢
3	. HD Mark		1			2			3		¢
4	. Characters		1			2			3		¢
5	. Trail Tone						Multi
			Single
6	. Int Reject		Off						2		3
						1
7	. Pulselength		Short
							Long
8	. Noise Reject						On
			Off
9	. Trail Time						30S		1M
			15S
		3M		6M			15M		30M		Cont
10.		Tune					Manu
			Auto
11.		Disp Data					Nav		ARP		All
			Off
12. WPT Mark							On
			Off
13.		EBL Ref					True
			Rel
14. VRM Unit			nm				km		sm
15. Watchman							5M		10M		20M
			Off
16. STBY Disp							Econo			Nav
			Norm
17.		Guard Mode	In				Out
18.		Own Position					TD
			L/L
19.		Cursor Posi					L/L
			R/B
20.		Alm sense LV					Mid		Hig
			Low
21.		Dead Sector					On
			Off
22.		Range							1
				1/8	1/4		1/2	3/4		1.5
		2 £ 4			§	8		⁄216		¤4‹6

23.Self Test

24.Installation Setup

Figure 3-6 OTHER MENU

14