System and method of determining cable characteristics
US5128619A · kind A · utility
Inventors
Key dates
| Filing date | Sep 5, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Sep 5, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/306
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of and system for automatically determining length, attenuation, impedance and existence of bridge taps on installed communication cable having access to only one end of the cable. A waveform, which includes incident and reflected pulses, is analyzed to determine the presence of significant pulses. The presence of only one positive significant pulse indicates the absence of any discontinuities and facilitates the calculation of a signal-to-noise ratio which determines whether the cable will support the operation of digital communication thereon. The presence of more than one positive significant pulse or a negative pulse indicates the presence of at least one fault on the cable which prevents the operation of digital communication on the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.