sonar apparatus and system fault finding and repair, safe working practices and relevant standards codes and regulations, including: electronic communications, sonar system operating principles: the purpose and application of sonar systems sonar equipment encompassing: types and their applications sub-system components (i.e. functional blocks) and their function encompassing: transducer input amplifier sonar interface unit beam forming network (transmit/receive) signal processing own Doppler nullification display system headset interfaces transmitter T/R switch timer/timing sonar operating parameters sonar transmission characteristics electronic communications, sonar transducers and arrays: hazards and risk control measures transducer types, their operating principles and parameters transducer array encompassing: types and their construction applications transducer hull outfits beam forming principles and requirements transducer installation and operational maintenance electronic communications, sonar measurement and set-up: sonar parameters and measurements sonar physical parameters constraints and consequences electronic communications, radar and sonar displays devices: types and their applications – cathode-ray tube (CRT), plasma, liquid-crystal display (LCD), monochrome, colour and touch screen sub-system components (i.e. functional blocks) and their operating parameters encompassing: extra high tension (EHT) transformers detectors video distribution time base generators phase locked loops microprocessors memory devices demodulators focusing/deflection devices delay lines bleed resistors high voltage (HV) generation calibration testing and maintenance procedures typical fault finding, their symptoms and cause advanced electronic (sonar) testing and measuring devices and techniques: test/measuring devices and their application - frequency counters, and synthesisers, spectrum analysers, noise and distortion meters and radio frequency (RF) communications service monitor connection of test/measuring devices into a circuit encompassing: safety procedures loading and matching storage and delay circuit arrangement of test/measuring devices taking and interpreting readings notion of decibels, including dBm, dBr, dBu and dBo fault finding and repair: typical faults, their symptoms and cause fault diagnosis procedures and testing component replacement equipment adjustments relevant manufacturer specifications relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures. |