Leakage testing cable connector network

Details Leakage testing cable connector network Leakage testing cable connector network

1982-08-23

1985-06-25

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

324 52, 324 61R, 73 1DV, 73 40, 1791753F, G01V 138, G01R 2726, G01R 3108

Patent

active

045258147

ABSTRACT:
Disclosed is test apparatus included in a cable transmission system having intermediate local data units spaced along a cable, one connection to the cable also being to a master or control station. At each data unit, there is an input differential amplifier with two input terminals for application of at least one local data signal. A test signal is applied to the data unit via a transmission connection from the master station to a first element of a voltage divider connected to one of the two input terminals of the differential amplifier. A switch at the data unit is connected for disconnecting the data connection from the other input terminal of the differential amplifier. A second switch at the data unit, provides a connection to a conductor leading to the master station for connecting earth ground to the data unit local circuit common. Measuring the output voltage level from the data unit, which may be conveniently done via the communication link to the master station, reveals the presence of a leakage impedance path at the local unit.

REFERENCES:
patent: 3584953 (1970-08-01), Grant
patent: 3622875 (1971-11-01), Hamamatsu-shi
patent: 3710244 (1973-01-01), Rauchwerger
patent: 3765240 (1973-10-01), Haus, Jr.
patent: 3771548 (1973-11-01), Rauchwerger
patent: 4366561 (1982-12-01), Klein
patent: 4400663 (1983-08-01), May
patent: 4410850 (1983-10-01), Pesto et al.

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