Method of locating faulty pulse repeaters

Details Method of locating faulty pulse repeaters Method of locating faulty pulse repeaters

1980-03-11

1982-03-09

Robinson, T. A.

H04B 346, H04B 160

Patent

active

043190804

ABSTRACT:
A method of testing a plurality of repeaters arrayed along a transmission line of a pulse code modulation system, and of locating any faulty repeaters, both testing and fault location being performed automatically. Pulse train groups, each containing a frequency component corresponding to a supervisory signal frequency of one of the repeaters, are successively applied from one terminal of the transmission line. Each pulse train group comprises a plurality of subgroup pulse trains, each of which contains the supervisory frequency component of the pulse train group to which it belongs, with the density of a pulse train in successive subgroups being successively increased. Any faulty repeater is located by determining the pulse train density at which a supervisory signal produced by the repeater fails to increase by a predetermined amount for a known change in pulse train density.

REFERENCES:
patent: 3083270 (1963-03-01), Mayo
patent: 4112263 (1978-09-01), Lender

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