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cases change the RANGE MODE from AUTO to MANUAL Range and manually
adjust the depth range until the bottom echo becomes visible on the Fish Finder
display.
17.11.2
Surface Noise Filter
An automatic filter that attempts to remove Surface Clutter that causes the screen to be filled
up with strong return echoes just below the surface. It may seem that the same functionality
could be achieved using on the STC control however there is main difference between such
control in fact the STC control impacts the capability to detect and track the bottom and is
not designed to cancel completely the surface noise, on the other side the Surface Noise
Filter attempts to cancel completely the surface noise but it doesn't affect the capability to
detect and track the bottom. Filter gradually attenuates surface noises. The Surface Noise
Filter has 9 settings: OFF, 1, ..., 8. When set to 1 the Surface Noise is attenuated from
surface down to a depth of 5 Ft, increasing the Surface Noise increases the depth in which
the Surface Noise is attenuated as well as the attenuation level increases; when the preset
is set to 8 the attenuation is maximum and is applied from surface level down to a depth of
255Ft, as shown in the Surface Noise Filter Table reported below:
17.12 DISPLAY SETUP
Allows the Fish Finder's display page appearance to be changed.
17.12.0
Color Settings
Allows you to change the color of the Fish Finder display from Blue (default), White, Black,
Gray scale.
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Figure 17.11.2 - Surface Noise Filter Depth table
Figure 17.12 - Display Setup menu
CPF180i and CPF300i
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