Furuno 1933, 1943, 1833 manual Rejecting Radar Interference, Radar interference

2. RADAR OPERATION

2.14Rejecting Radar Interference

Radar interference may occur when near another shipborne radar that is operating in the same frequency band as your radar. Its on-screen appearance looks like many bright dots either scattered at random or in the form of dotted lines extending from the center to the edge of the display. Interference effects are distinguishable from normal echoes because they do not appear in the same place on successive rotations of the scanner.

Be sure to turn off the interference rejector when no interference exists – weak targets may be missed.

Radar interference

1.If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2.Press the SIGNAL PROC. soft key.

.250/	.125nm	° M	SIGNAL
		319.9	PROCESS
SP
H-UP
			I. REJ
			LOW

E. AVG

OFF

PULSE

E. STR

LOW

RETURN

+ 359.9° R 0.277nm

SIGNAL PROCESS soft keys

3.Press the I. REJ soft key successively to choose the interference rejection level desired; LOW, MED, HIGH or OFF. HIGH provides maximum interference rejection.

4.Press the RETURN soft key to finish.

The display shows IR L (Low), IR M (Medium) or IR H (High) when the interference rejector is on.

2-18