CATV frequency sweep testing using RF transmitter to generate test signals
US5585842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, system and apparatus for frequency sweeping and frequency swap testing a CATV system wherein the CATV system has a plurality of channels and is transmitting television signals over at least some of the channels. The system includes a head end test unit coupled to the CATV system at its head end and a remote test unit coupled to the CATV system at a location remote from the head end. The head end test unit sweeps the CATV system by either generating and transmitting test signals at the channel frequencies over the CATV system or, if a television signal is being transmitted on a channel, using the television signal as the test signal. The head end test unit also measures the signal levels of the test signals and at the end of the sweep, transmits telemetry signals, which include the frequencies to be swept and the measured signal levels, over the CATV system to the remote test unit using the same transmitter that it used to generate and transmit the test signals. The remote test unit receives the information transmitted by the head end test unit and sweeps the same frequencies simultaneously with the head end test unit. During the sweep, the remote test unit measures the si…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.