Detecting signal leakage in cable networks
US9660742B2 · kind B2 · utility
3Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2016 |
| Grant date | May 23, 2017 |
| Priority date | — |
| Expiry date | May 31, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/34
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal leakage in a cable network may be detected by using a test device to obtain a spectrum of an electromagnetic wave propagating in vicinity of the cable network, and automatically detecting QAM channels in the obtained spectrum by detecting characteristic spectral roll-offs at boundary frequencies between QAM channels of the cable network. A test device may be used to determine which QAM channels are currently active on the cable network, thereby facilitating automatic QAM signal leakage detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.