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3.4.8    Interference Rejection [IR] 
Interference by other radars is rejected. 
 
 
 
 
 
 
 
 
 Procedures  1  Put the cursor on    IR    at the upper right of the screen and press 
[ENTER] key. 
The interference rejection modes are switched. 
Rejection levels of the interference rejection 
IR OFF:    Interference rejecter off 
IR LOW:  Interference rejection level - low 
IR MEDIUM:  Interference rejection level - middle 
IR HIGH:  Interference rejection level - high 
When a high interference rejection level is selected, the radar’s ability of detecting small 
targets such as buoys and small boats lowers. 
In general, [IR LOW] should be selected. 
3.4.9    Hide/Display Range Rings [RANGE RINGS] 
 Procedures  1  Press [RANGE RINGS] key. 
The range rings is switched to On or Off. 
z When viewing a radar beacon or SART signal, select
IR Off (Interference Rejection Off) because IR
processing suppresses the video.
Attention