Digital receiver design based on leading-edge DSP technology, offering superbly defined image resolution, wide-dynamic range sonar echogram previously unavailable with traditional analog circuitry designs.

State-of-the-art signal processing techniques include selectable gain-controllable range offsets, TVG control curves, receiver passbands, echo dynamics ranges, and overall gain attenuation setting (for prevention of receiver blocking by short/shallow (range signals).

Selectable transmit power levels with automatic selection of pulse widths optimised for the range in use, with each pulse expandable in 2 steps for long range search applications where additional effective power to targets is needed.

Operating modes include sonar mode (full circle/sector scanning with off-centering), side scanning (bottom scanning) and echo sounder modes, each mode shown across full screen area or split screens with simultaneous presentation of system parameter settings or time-wise compressed sounder mode echogram.

Eight search. depth ranges are user-definable in 10-unit steps from 10 to 2000 meters, fathoms, braccia or in 20-unit steps for footage-calibrated rate scales.

XGA video output available for uncompromised echogram resolution across an optional devoted 17-inch LCD marine monitor or a commercially available PC display accepting XGA format signal input.

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Specification