Method and apparatus for troubleshooting the stereo audio circuits of a Beta type VCR
US5267319A · kind A · utility
1Cited by
1References
3Claims
0Family size
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A composite test signal which consists of the combination of four audio modulated carriers is developed and injected into the stereo audio circuits of a Beta type VCR. The audio output of the VCR is observed or listened to in order to determine if the circuits downstream of the point of injection of the test signal are operating correctly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.