Method for detecting digital carrier signals on twisted pair tra

Details Method for detecting digital carrier signals on twisted pair tra Method for detecting digital carrier signals on twisted pair tra

1996-05-08

1997-08-26

Nguyen, Vinh P.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

324117R, G01R 3102

Patent

active

056613962

ABSTRACT:
An improved method and apparatus for detecting signals on a twisted pair of transmission lines includes a sensor for nonintrusively coupling a portion of the signal to the apparatus. A filter is coupled to the sensor and filters unwanted frequencies from the signal. The signal is then amplified and optionally passed to an identification circuit which identifies the presence of high and low frequency signals. The signal is rectified creating a DC signal proportional to the detected signal's strength. An audio tone proportional to signal strength is generated and the tone is amplified and output.

REFERENCES:
patent: 3197702 (1965-07-01), Schweitzer, Jr.
patent: 4331915 (1982-05-01), Fielden
patent: 4454557 (1984-06-01), Hurley
patent: 4491790 (1985-01-01), Miller
patent: 4706017 (1987-11-01), Wilson
patent: 4868887 (1989-09-01), Bertrand
patent: 5140614 (1992-08-01), Bubee et al.

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