Method and apparatus for testing transmission lines

Details Method and apparatus for testing transmission lines Method and apparatus for testing transmission lines

1977-06-06

1978-08-29

Olms, Douglas W.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

1791753F, 324 52, H04B 346

Patent

active

041105729

ABSTRACT:
A method and apparatus for testing for forward echoes produced by signal transmission through a length of transmission line in which a succession of 1 ns pulses are applied to the line and the outward signals are multiplied by pulses delayed by a succession of discrete delay times. The products resulting from 65,500 pulses subjected to the same delay are integrated to eliminate the effects of thermal noise and the results for different delay times plotted against the delay time to produce a correlation curve in which the echoes appear as perturbations on the curve.

REFERENCES:
patent: 3244975 (1966-04-01), Bauer
patent: 3255406 (1966-06-01), Schluter
patent: 3492464 (1970-01-01), Hill et al.
patent: 3753086 (1973-08-01), Shoemaker
patent: 3911358 (1975-10-01), Shalyt et al.
patent: 4041381 (1977-08-01), Hwa

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