FIELD: measurement technology. SUBSTANCE: optical reflectometer includes pulse former, radiation source, coupler, controlled fiber- optical path, two photodetectors, analog commutator, comparator, attenuator, pulse stretcher, analog-to-digital converter, two microcontrollers, indicator, control desk, programmable permanent storage connected in series. It is supplemented with two electron keys, electron analog key, delay line and programmable frequency divider. EFFECT: raised accuracy and resolution of measurements. 4 dwg
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