Installation manual

Simrad SP70
138
850-164186 / Rev.D
RCG (Reverberation Controlled Gain)
The RCG button is located in the Horizontal, Vertical, Echo
Sounder and Trawl menus.
The RCG (Reverberation Controlled Gain) regulates the
receiver gain individually for each of the 64 receiving beams.
In Weak and Medium selections, signals with small variations,
like propeller noise, surface and bottom reverberations will be
removed, while signals with fast variations, like target echoes or
bottom echoes, will not be removed. In Strong, a special filter
removes the bottom, while echoes on the bottom will be
presented.
Note that scattered fish can be perceived as reverberation. The
RCG function should therefore be used with care if scattered
schools are to be detected.