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.
Frequency: 80 kHz (DSL-1000-80), 140 kHz (DSL-1000-140) or 180 kHz (DSL-1000-180)
Operating Modes: Sonar, Bottom (Side) Scanning, Echo SOunder
Search/ Depth Ranges: 8 user-definable ranges to 2000 m/fm/br in 10-unit stpes
Transmit Power: Approx 1.5kW (max.) adjustable in 4 steps
Beam Width (-6db): 19° (H) X 15° (V)/80 kHz, 12° (V)/140kHz, 10° (H) X 10° (V)/ 180° kHz
Gain Control Offset: 10,20,30,40,50 dB
TVG Curves: 10Log R, 20Log R, 30LogR, 40Log R
Receiver Passbands: Selectable 5 steps
Recommended Trunk: 146mm (6") inside diameter (user/shipyard-supplied)
Hoist Pipe length: 1681 mm (standard), 1981 or 3000mm (option)
Soundome Diameter.Travel: 142 mm/200 to 400mm
Hoisting Speed: Approx. 12 seconds for 400 mm travel at 24 VDC