![]() ![]() If a microphone has a single-LED, it is usually turned on when the mic is muted, and turned off when it is unmuted (although it can be configured to work in the opposite way as well). LEDs are generally connected to Logic Outputs on an EX-LOGIC or the GPIO port of a server or TesiraFORTÉ. Some microphones feature one or more LEDs to indicate the current mute state. So, if you are working with normally-open switches, you'll usually need to either put the logic signal through a NOT gate, or just enable the Invert button in the Logic Input block. Tesira logic blocks usually work best with normally-low logic signals. Therefore, normally-closed mute switches create normally-low logic signals, and normally-open mute switches create normally-high logic signals. On a Tesira logic input, a short circuit will create a low logic signal (i.e., off), and an open circuit will create a high logic signal (i.e., on). When connecting these mute switches to a Tesira system, it is important to know whether the switch is normally-open or normally-closed. The Desk Microphone is the perfect partner for your control room dispatcher.Mic mute switches can be normally-closed (meaning that they normally create a short circuit, and then create an open circuit when the mute switch is pressed) or normally-open (meaning that they normally create an open circuit, and then create a short circuit when the mute switch is pressed).
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