Interference Rejector - Furuno FR-8062 Operator's Manual

1. OPERATIONAL OVERVIEW
1.15

Interference Rejector

Mutual radar interference may occur in the vicinity of another shipborne radar operating in the
same frequency band. It is seen on the screen as a number of bright spikes either in irregular pat-
terns or in the form of usually curved spoke-like dotted lines extending from the center to the edge
of the picture. Activating the interference rejector circuit can reduce this type of interference.
The interference rejector is a kind of signal correlation circuit. It compares the received signals
over successive transmissions and suppresses randomly occurring signals. There are three levels
of interference rejection depending on the number of transmissions that are correlated.
1. Press the MENU key to open the menu.
2. Choose the Echo menu and then press the ENTER key.
3. Choose Interference Rejector and then press the ENTER key.
Off
Low
Med
High
4. Choose Off, Low, Med or High as appropriate and then press the ENTER key.
5. Press the MENU key to close the menu.
Be sure to turn off the interference rejector when no interference exists so as not to miss small
targets.
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Interference