FIELD: physics.
SUBSTANCE: system to receive data signal from source 3 comprises low-frequency channel 1 of generation and amplification of acoustic signals incorporating stabilised frequency or other complex signal oscillator 6, thyristor inverter 7, unit to match inverter output with cable 8, low-frequency transmitter 2, receiving acoustic transducer 4 signal reception, processing and registration channel 5 including wideband preamplifier 9 with wave temporary code converter 10, narrow-band spectral analyser 11, and recorder 12.
EFFECT: increased range, expanded frequency range and operating performances.
6 dwg
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