Return path ingress in a two-way CATV system
US6292944A · kind A · utility
9Cited by
25References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1997 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jul 29, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/64723
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for locating the source of noise ingress into a CATV system return path by coupling a filter having a passband in the noise frequency bandwidth to the nodes between adjacent return path amplifiers. The filter is sequentially coupled to the nodes, working away from the CATV system headend. A signal level meter or the like monitors the effect on the noise of coupling the filter to the nodes. When a node is reached at which coupling of the filter to the node no longer has any effect on the signal level in the node, the source of the noise is isolated in the node immediately preceding the node under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.