Testing of CATV systems
US6687632B1 · kind B1 · utility
37Cited by
20References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Jun 27, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for determining the location of an impedance mismatch in a digital communication circuit (22) generate (20) at least quasi-random data, transmit the data along the circuit (22) from a transmitting end of the circuit (22), recover (24) reflections from impedance mismatches in the circuit (22) adjacent the transmitting end of the circuit (22), correlate the reflections with the data to generate a correlation result, identify a reflection peak in the result, and multiply the propagation velocity of the data through the circuit (22) by a time delay to the reflection peak.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.