Furuno FAR-21 7-BB Series, Operator'S Manual

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1. RADAR OPERATION
1-88
1.47 Wiper
The wiper feature automatically suppresses the brilliance of weak signals (noise,
sea clutter, rain clutter, etc.) and unwanted signals such as radar interference to
clear the picture of unwanted echoes. Its effect depends on the wiper setting
used and whether each averaging is turned on or off, as described below.
Echo averaging and wiper states and wiper affect
Wiper setting 1 Wiper setting 2
Echo averaging OFF Condition A Condition A
Echo averaging ON (1/2/3) Condition A Condition B
Condition A: The brilliance of unwanted weak echoes, such as noise, sea
clutter and rain clutter, is reduced to clear up the picture. The difference between
wiper setting “1” and “2” is that brilliance is lowered more slowly “2”.
Condition B: Echo averaging is automatically activated when the wiper feature
is turned on, allowing you to instantly see how the picture is affected with echo
averaging turned off and turned on.
To activate the wiper feature, do the following:
1. Roll the trackball to choose the MENU box and then push the left button.
2. Roll the wheel to choose 1 ECHO and then push the wheel or the left button.
[ECHO]
1 BACK
2 2
ND
ECHO REJ
OFF/ON
3 TUNE INITIALIZE
4 PM*
1
OFF/ON
5 SART
OFF/ON
6 WIPER
OFF/1/2
7 ECHO AREA*
2
CIRCLE/WIDE/ALL
* 1
Not available on FAR-2157/2167DS
* 2
Not available on IMO or A type
ECHO menu
3. Roll the wheel to choose 6 WIPER and then push the wheel or the left button.
4. Roll the wheel to choose OFF, 1 or 2 as appropriate and then push the wheel
or the left button.
5. Push the right button twice to close the menu.