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Overview
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The Silence Sensor makes it easy to monitor the presence of audio by sensing and detecting the loss of audio at your site.
Activation consists of two stages: an open-collector output on "silence" and another open-collector output plus relay closure on "time-out". The presence of audio is the control mechanism. You can set the "time-out" activation for up to 99 seconds or 99 minutes after the loss of program audio on both left AND right channels.
The unit recognizes both rising and falling edges of audio. In addition, it observes audio on a wide band basis, and in a narrow band manner at 470 Hz. This permits the unit to ignore hum and other false signals.
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Additional Resources