Method and test unit for far end crosstalk measurements
US6259258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jul 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/487
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A test system method for measurement of crosstalk in a multi-pair cable of the type used in local area networks. The system uses a far end signal generator at one end of the cable and a near end signal generator at the near end of the cable. For a far end crosstalk measurement, the far end test unit transmits a high frequency far end test signal and a lower frequency reference signal on one of the wire pairs of the cable. The near end test unit responds to the received reference signal to generate a near end test signal in phase coherency with the far end test signal. A far and crosstalk measurement analysis is then conducted using the received far end test signal, the near end test signal and a crosstalk signal induced by the far end test signal in one of the other wire pairs of the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.