Vector scope
US4488168A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1981 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Sep 8, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method and a vector scope for measuring distortion of a subcarrier signal causing color aberration of a color television signal, a carrier chrominance signal resulting from a color bar signal transmitted in a transmission system and a reference carrier chrominance signal including a signal determining levels of the amplitude and phase distortions of said carrier chrominance signal are demodulated through the same demodulating device and color difference signals thus obtained are displayed in vector, whereby only the distortion of the subcarrier by the transmission system is measured independently of the influence of the distortion of the vector scope itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.