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1. OPERATION
1-38
1.30 Noise Rejector
White noise can appear on the screen as random "marks". You can reduce this noise
as follows:
1. Press the MENU key to open the menu.
2. Use S or T to select [Echo] and press the ENTER key.
3. Use S or T to select [Noise Rejector] and press the ENTER key.
Noise Rejector options
4. Use S or T to select [Off] or [On] then press the ENTER key.
5. Press the MENU key to close the menu.
1.31 Wiper
The wiper feature automatically reduces the brilliance of unwanted weak signals
(noise, sea clutter, rain clutter, etc.) and unnecessary signals, like radar interference,
to clear the picture of unnecessary echoes. The result of wiper depends on the wiper
setting used and whether echo averaging is turned on or off, as described below.
Processing content A: The brilliance of unnecessary weak echoes, like noise and ra-
dar interference, is reduced to clear the picture. The difference between wiper 1 and
2 is that brilliance is lowered more slowly in 1.
Processing content B: Echo averaging is automatically turned from off to on when
the wiper feature is turned on. You can see how the picture changes with the echo av-
eraging turned off and turned on.
To activate the wiper feature, do the following:
1. Press the MENU key to open the menu.
2. Use S or T to select [Echo] and press the ENTER key.
3. Use S or T to select [Wiper] and press the ENTER key.
4. Use S or T to select [1] or [2] then press the ENTER key.
5. Press the MENU key to close the menu.
Note: When the [Display Mode] is [True View], this function is not
available (see paragraph 1.7.2).
Wiper 1 Wiper 2
Echo Average Off Processing content A
Echo Average On (1,2, Auto) Processing content A Processing content B
Off
On
Wiper options