Method and apparatus for aligning traps in a television receiver
US4562469A · kind A · utility
4Cited by
1References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1983 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Jul 11, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video carrier, which is amplitude modulated with a fixed video pattern signal, and sync and blanking signals, is combined with an amplitude modulated I.F. trap frequency signal and supplied to the input of the I.F. stages of a television receiver to cause the video pattern to be displayed on the screen of the receiver, which pattern will exhibit interference until the I.F. trap corresponding to the applied I.F. frequency is set precisely at the applied I.F. frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.