"Signalization with true ""on air"" event including opto-isolation"
US5479519A · kind A · utility
9Cited by
4References
5Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Feb 25, 1994 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Feb 25, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a device which provides a logic signal that indicates a true "on air" event during broadcast production. Each audio channel input from a microphone to a mixing console is coupled to a circuit arrangement which determines whether a mute switch is selected, a fader is set for full attenuation, or an input switch is deselected. If none of these events have occurred a signal is provided to an external display which is optically isolated from the mixing console. This signal controls a tally which indicates to a user that the corresponding input channel, for example, from a microphone is active.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.