Method and apparatus for testing communication systems

Details Method and apparatus for testing communication systems Method and apparatus for testing communication systems

1984-08-29

1986-09-09

Schreyer, Stafford D.

H04B 346

Patent

active

046111018

ABSTRACT:
A microcomputer controlled apparatus and method for testing communication lines including circuits serving multiple functions in the measurements of line electrical and noise characteristics. A current divider, an analog to digital converter, a constant current source, various filters and an RMS-to-DC converter are used to perform A.C. and D.C. voltage and current measurements, resistance measurement and noise measurement. Capacitance measurement circuits and method utilize a buffer for isolating the capacitance on the wire measured from other capacitance sources.

REFERENCES:
patent: 3842218 (1974-10-01), DeLuca et al.
patent: 3969594 (1976-07-01), DeLuca et al.
patent: 4446341 (1984-05-01), Rubin
Installation Guide, 4T-880, Manual Part, No. 997-880-00, Jul 1981, Teradyne, Inc.
Microcomputer Interactive Test System 70, Lardel, 40 pp.
Repair Bureau, Microcomputer Systems, Feb. 1983, 12 pp.
Automatic Line Test Set, Lordel T-9/15, pp. 1, 2, 13 and 25.
4TEL, Automatic Subscriber Loop Test System, Teradyne, pp. 1-18.
LRS-1 Automated Loop Reporting System, Northeast Electronics Instruction Manual, A3798-80601, Issue 1, Jun. 1979, 4 pp.

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