ERAS Sonar Test System - Low Frequency

ERAS Low Frequency is a low cost, compact and flexible sonar test system. Designed for hand-deployment from small vessels, it contains both projector and hydrophone. Transmit, repeat and test signals with the Echo Repeater Acoustic Source System (ERAS)

ERAS is controlled by an easy-to-use Graphical User Interface, commanding the Digital Signal Processing software to Echo Repeat, Transpond and produce calibrated complex transmissions.

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ERAS Low Frequency is a low cost, compact and flexible sonar test system, designed for hand-deployment from small vessels, it contains both projector and hydrophone.

Features & Applications

ERAS Low Frequency Features:

  • Compact and lightweight system, ideal for transportation
  • Hand deployable from a range of ocean vessels
  • Acoustic source and echo repeat functions for generating and receiving signals

ERAS Low Frequency Applications:

  • Sonar test and calibration
  • Underwater target detection
  • Sonar operator training
  • Surveillance
  • Noise signature simulation
  • At sea, acceptance trials

ERAS Low Frequency Operating Modes:

  • Complex Signal Source
  • Sequence
  • Echo Repeater
  • Transponder
  • Received Signal Monitor
  • Slant range Measurement

Specifications

ERAS Low Frequency Source Modes:

  • Source Transmit Generation Bandwidth 280Hz to 2600Hz
  • Pulse Lengths 3ms to 10s or CW
  • Number of Pulses Up to 1000
  • Pulse Intervals Up to 60s
  • Variable Step Levels -10 to +10 dB
  • Tones Up to 24 (each with definable source levels & frequencies – CW or pulsed
  • Sweeps LFM or LPM
  • Noise Either Broadband or up to 5 user definable bands
  • Noise Types White, Pink or Pseudo-Random
  • Modulated Signal AM or FM, user definable carrier and modulating
    signal

ERAS Low Frequency Transpond Modes

  • Frequency Range 280Hz to 2600Hz
  • Pulse Length 0.010s to 10.00s (0.001s step)
  • Variable Step Levels -10 to +10 dB
  • Trigger Types Acoustic, TTL pulse or manual
    Trigger Level & Averaging Fully user definable
  • Transpond Types LFM or LPM sweep, Monotone or Source Mode

ERAS Low Frequency Operating Modes:

  • Echo Frequency 2000Hz and 2600Hz
  • Trigger Types Acoustic, TTL pulse or manual
  • Trigger Level & Averaging Fully user definable
  • Echo Length 10ms to 5s
  • Added Doppler -40 to +40 knots
  • Added Echo Strength -30 to +40 dB
  • Echo Delay Up to 60s
  • Highlights Up to 5
  • Highlight Strength -30 to +30 dB
  • Highlight Offset: Up to 200ms
  • Moving Track Target Velocity –40 to +40 knots
  • Tag on Transpond User configurable

ERAS Low Frequency Mechanical:

  • Computer 405 x 225 x 205mm, 10kg
  • Power Amplifier: 445 x 220 x 538mm, 15kg (splashproof)
  • Transducer: 260 outer diameter x 608mm length, 8.3kg
  • Cable Length: 50m
  • Computer Power Requirement: 90 to 250V AC auto switching 50/60 Hz
  • PA Power Requirement: 95 to 130V or 185 to 260VAC auto switching 50/60 Hz

Accessories and Related Products

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