System and method for providing a time varying gain TDR to display abnormalities of a communication cable or the like
US6653844B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jul 27, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/1316
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a system and method for testing and displaying the abnormalities, includes opens, shorts, bridged-taps and wet sections, of a copper pair line for xDSL service use, the abnormalities are amplified and normalized so as to be displayed within a predetermined observation range. The normalization steps include piecewise gaining and biasing the reflected pulse of various gains to create a first normalized reflected trace which match the reflected traces within a predetermined observation range and thereby constitute a total smooth curve; and amplifying the first normalized reflected trace according to a function of time to create a second normalized reflected trace so as to eliminate an exponential gain decay curve of a no-fault copper pair line with the same predetermined characteristic parameters from the first normalized reflected trace to thereby obtain a second normalized reflected trace showing any amplified abnormalities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.