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In addition to the operator adjustable signal amplitude decay compensation there
is also an existing layer of suppression programmed into the Sludge Finder
software. This suppression becomes active when SBR’s or Secondary are chosen
as the application type.
The suppression works by applying negative gain compensation to the settle zone
in front of the leading edge of the gate as indicated below.
If Industrial or Primary is chosen as the application type this compensation is not
present. However, in instances where there are large amounts of settling material
in front of the true echo, as shown below by the Blue Trace (the Raw Echo Signal
Return), and the operator adjustable signal amplitude decay compensation is not
sufficient, it may be necessary to alter the application type to increase signal
suppression.