Furuno FAR-2218, Operator'S Manual, Page: 62 / 294

1. OPERATIONAL OVERVIEW
1-40
1.26 Noise Rejector
White noise can show itself on the screen as random “speckles” spread over the entire
radar image. This equipment reduces the white noise, then improves the on-screen S/
N ratio by processing the weighted moving average filter for the received echoes in
the range direction.
Note: Use this function with caution. Weak target echoes may disappear from the
screen or the range resolution may worsen.
To remove this noise do the following:
1. Open the menu.
2. Select [1 ECHO].
3. Select [2 CUSTOMIZED ECHO].
Note: You can also right-click the [PICTURE]
box to access this menu.
4. Select [7 NOISE REJECTOR].
5. Select [OFF] or [ON] as appropriate. The indication for noise rejection is located
at the top-left of the screen.
The indication changes according to the selected setting.
1.27 Wiper
The wiper feature automatically reduces the brilliance of weak signals (noise, sea clut-
ter, rain clutter, etc.) and unwanted signals such as radar interference to clear the pic-
ture of unwanted echoes. Its effect depends on the wiper setting used and whether
each averaging is turned on or off, as described below.
Condition A: The brilliance of unwanted weak echoes, such as noise, sea clutter and
rain clutter, is reduced to clear up the picture.
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.
Note: The [WIPER] function requires valid data input for position, speed and heading.
To activate the wiper feature, do the following:
1. Open the menu.
2. Select [1 ECHO].
3. Select [9 WIPER].
4. Select the desired setting.
The options are: [OFF], [1] or [2].
5. Close the menu.
Wiper setting 1 Wiper setting 2
Echo averaging [OFF] Condition A Condition A
Echo averaging on ([1], [2] or [3]) Condition A Condition B
Noise Rejector
indication