FIELD: invention refers to means (systems) of detection.
SUBSTANCE: ultra high frequency block of fathometer has commutator of antennas, balanced modulator, operational amplifier, two filters of concentrated selection, commutator of pass band, scheme of manual regulation of reinforcement, amplitude detector, integrator, follower. In scheme of block there are additionally introduced seismic receiver and seismic compensator of interferences consisting of regulated amplifier, filter of low frequencies with band pass corresponding to frequency spectrum of seismic noise component of hydro acoustic signal and of block of coherent compensation of interferences. At that output of amplitude detector is connected to main input of seismic compensator of interferences, and seismic receiver is switched to compensational input.
EFFECT: increases noise immunity.
3 dwg
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