A.U.D.I MkIII- Acoustic Underwater Development Instrument

The A.U.D.I – Acoustic Underwater Development Instrument was designed for
laboratory work at the request of University marine engineering departments , and
Oceanographic underwater research establishments. The A.U.D.I provides access to a wide
range of transducer drive signals which can be preset (Cal), or continuously variable (Var).
A built-in, dual channel, high resolution data acquisition Signal Analyzer*, with an arbitrary
waveform generator, enables all signals to be monitored/analysed. The A.U.D.I software
creates a full range of virtual instruments – Oscilloscope, Spectrum Analyzer, Multimeters,
Transient Recorder (data logger) – on a Windows OS PC/laptop display.
The A.U.D.I can also be used for SONAR/ASW training, as a demonstrator, and to give
students hands-on experience with real-time Active/Passive SONAR configurations.

A.U.D.I Features: 

Integrated high resolution (12 bits) PC Data Acquisition *Signal Analyzer & AWG. · Variable/Calibrated Pulse Repetition Frequency (PRF) – for ranges <.5 meter – >6 meters.
· Variable/Calibrated Pulse Width (PW) Continuous or Single shot <2 µsecs – >4 msecs.
· Variable CW Oscillator – <12 kHz – >700 kHz. · Four Calibrated (preset) CW Oscillator outputs – 200 kHz, 100 kHz, 40 kHz, 20kHz. · Frequency display – four digits.
· FM Modulation output – 50 Hz to 110 Hz @ 2v pk-pk. · Switched Gate & Sync Output @ TTL level.
· Three transducer drive amplifiers Tx1, 2, 3 with variable Gain. · Variable Phase, plus cascade Phase on Tx 2 and Tx 3, referenced to Tx 1 Output.
· Three High Voltage parallel outputs – 40 volts pk-pk max. · Auxiliary Amplifier with three inputs, and x4 Gain control.
· Three fixed gain (x 4) general purpose amplifiers ‘A’.
· Motor Speed control voltage – 0 to 12 volts dc at >1 amp.
· Access to +5, -5, +15, -15 volts dc for external R&D circuitry.

A.U.D.I

*Signal Analyzer in brief:

· PC/laptop, dual channel Data Acquisition Signal Analyzer – USB 
· Sample rate – 500 Ms/sec
· Resolution  – 14 and 16 bit 
· Windows   OS 10
· ASCII data files for exporting to other applications
· Oscilloscope, Spectrum Analyzer, True RMS Voltmeter
· Transient Recorder (Data Logger) – 21 minutes to 750 days
· Spectrum lin/log and volts/dB axis
· FFT Windows – Rectangle, Hanning, Hamming, Blackman, Bartlett
· FFT points – 16 to 32,768
· Arbitrary Waveform Generator (AWG) – 14 bit resolution.

o AWG Frequency range – 1μHz to 40 MHz
o Output impedance – 50 Ohms
o Output signal amplitude – >24 volts pk-pk
o Sine, Square, Triangle, White Noise, DC, and User Defined waveforms
o Variable Symmetry (Mark to Space ratio)– 1 to 99% in 1% steps
o Frequency Sweep control