Interference Rejector - Furuno FAR-2218-BB Operator's Manual

1. OPERATIONAL OVERVIEW
1.22

Interference Rejector

Mutual radar interference can occur in the vicinity of an-
other shipborne radar operating in the same frequency
band. It is seen on the screen as a number of bright
spikes either in irregular patterns or in the form of usually
curved spoke-like dotted lines extending from the center
to the edge of the picture. Activating the interference re-
jector circuit can reduce this type of interference. The in-
terference rejector is a kind of signal correlation circuit. It
compares the received signals over successive trans-
missions and reduces randomly occurring signals. There
are three levels of interference rejection depending on the number of transmissions
that are correlated.
You can access this feature from the InstantAccess bar
able settings are: [OFF], [1], [2] or [3].
How to reject interference from the InstantAccess bar
To adjust the interference rejector, select the [IR] button (
™
cess bar
The available settings, in cyclic order, are: [OFF]
Level [3] provides the highest level of rejection.
How to reject interference from the menu
1. Open the menu.
2. Select [1 ECHO].
3. Select [2 CUSTOMIZED ECHO].
4. Select [2 INT REJECTOR].
5. Select the required setting.
6. Close the menu.
1-32
, then left-click to cycle through the rejection levels.
™
, or from the menu. The avail-
TM
IR
) on the InstantAc-
OFF
[1] [2] [3] [OFF]...