Furuno NAVNET 1724C - Manual (Page 44)

2. RADAR OPERATION
2-13
2.14 Rejecting 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.
1.5/ 319.9 ° M .500nm
SP
H-UP
SIGNAL
PROCESS
+
359.9 ° R
1.40nm
RETURN
E. AVG
OFF
I. REJ
LOW
PULSE
SHORT
E. STR
LOW
SIGNAL PROCESS soft keys
3. Press the I. REJ soft key successively to choose the interference rejection level desired;
LOW, MED, HIGH or OFF.
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.