Signalization with true "on air" event including opto-isolation

Details Signalization with true "on air" event including opto-isolation Signalization with true "on air" event including opto-isolation

1994-02-25

1995-12-26

Isen, Forester W.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Temples

H04B 100

Patent

active

054795192

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.

REFERENCES:
patent: 4479240 (1984-10-01), McKinley, Jr.
patent: 5204908 (1993-04-01), Sims
patent: 5233666 (1993-08-01), Deveau
patent: 5259034 (1993-11-01), Lumsden

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