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Simrad SN90 Operator Manual
2
Open the
Active
3
Select
Noise Filter
4
Select a value from the options provided.
The choice you make is by default only applied to the currently selected (active)
view.
Related topics
Improving the recognition of fish and schools using receiver filters, page 79
Reducing bottom and surface reverberation with the RCG
(Reverberation Controlled Gain) function
When you transmit an acoustic pulse into the water to search for a target, echoes will
also be returned from any other objects in the beam. The energy reflected from these
"unwanted" objects is referred to as reverberation. Reverberation is often a limiting
factor, especially if you are searching for smaller targets.
Context
The
(Reverberation Controlled Gain) controls the receiver processing. The
RCG
algorithm handles each receiver beam individually. The filter reduces the unwanted
echoes from the bottom and from the sea surface. This enhances the visibility of schools.
Note
The numerical settings do not express an increasing filter strength. They represent
specific settings using different algorithms.
The algorithms in the filter may interpret scattered fish as reverberation. Use
reverberation controlled gain carefully if you wish to detect scattered fish.
82
menu.
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381295/B
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