Frequency domain reflectometer and method of compensating for tr

Details Frequency domain reflectometer and method of compensating for tr Frequency domain reflectometer and method of compensating for tr

1997-12-02

1999-09-07

Do, Diep

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324534, 324539, 702 59, 379 26, G01R 3111

Patent

active

059492368

ABSTRACT:
Frequency domain reflectometer and method of determining severity of faults in a transmission line are disclosed. The reflectometer compensates for attenuation effects in the transmission line when determining severity of faults. In general, the reflectometer applies a sweep signal to the transmission line in order to obtain a reflected sweep response signal. Then, the reflectometer obtains a sweep response spectrum from the reflected sweep response signal. The reflected sweep response signal includes a plurality of spectral peaks which represent the frequency components of the reflected sweep response signal. Then, the reflectometer determines a first attenuation compensation factor for a first spectral peak of the reflected sweep response spectrum. Furthermore, the reflectometer adjusts the reflected sweep response spectrum for effects due to attenuation in the transmission line by applying the attenuation compensation factor to the first spectral peak, thus compensating the reflected sweep response spectrum for attenuation within the transmission line. The reflectometer then obtains from the adjusted sweep response spectrum severity of an impedance mismatch in the transmission line.

REFERENCES:
patent: 4630228 (1986-12-01), Tarczy-Hornoch et al.
patent: 4739276 (1988-04-01), Graube
patent: 4766386 (1988-08-01), Oliver et al.
patent: 5128619 (1992-07-01), Bjork et al.
patent: 5498965 (1996-03-01), Mellitz

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