Method of measuring impulse durations, error locations and atten

Details Method of measuring impulse durations, error locations and atten Method of measuring impulse durations, error locations and atten

1985-01-24

1986-08-19

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

324 52, 324 585B, 1791753F, G01N 2188

Patent

active

046066322

ABSTRACT:
The invention relates to a method for measuring impulse periods, faults locations and attenuations in cables and light wave conductors. The object is to provide a particularly simple method which can be realized with little expense. The solution basically consists in the fact that each measuring impulse releases a saw-tooth generator, that the time value of the voltage delivered from the saw-tooth generator is compared with an adjustable direct current voltage and serves to open a gate circuit at specific times, that the reflected impulse is compared by a second comparator with a second direct current voltage and that the thus separated signals are led to the gate circuit and displayed by an indicator. The invention will primarily be used in locating faults in light wave conductors under difficult conditions on the construction site.

REFERENCES:
patent: 3853005 (1974-12-01), Schendel

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