Plastimo ECHOFISH 600 Manual De Instalación Y Funcionamiento página 22

In many situations, your fishfinder display will be affected by
undesired signals which may be caused by your boat engine,
turbulences, wiring, electrical and mechanical sources, etc.
Such undesired signals will produce unwanted marks on the
screen and may cause a misunderstanding of the underwa-
ter conditions.
In such situations ( when you see too much clutter on the
screen), increasing the Noise Filter will play an effect. The
larger the value is, the most unexpected data will be filtered.
If the Noise Filter value is too high, most of the sonar re-
turns (fishes for example) will not be displayed.
Note: in some situations while you have big trouble with noise, try to
find and fix the interference source, rather than operate your
fishfinder with a very high Noise Filter value.
To set the Noise Filter:
1- Press Menu to enter into menu setting.
2- Repeatedly Press Menu to switch to SONAR menu.
3- Use the Up / Down Arrow to select Noise Filter option.
4- Press Ent to enter into setting.
5- Use the Up / Down Arrow to change the value.
6- Press Ent to confirm and exit the setting.
3. Grayline
Grayline is used to show both strong and weak signals on
the display. If Grayline is "on", weak returns will be represented
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Echofish 600 – Installation & Operation manual