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// CODE SNIPPET

703.8.3.2 Optical Power Density

Accessible and Usable Buildings and Facilities 2017 of South Carolina > 7 Communication Elements and Features > 703 Signs > 703.8 Remote Infrared Audible Sign (RIAS) Systems > 703.8.3 Infrared Audible Sign Receivers > 703.8.3.2 Optical Power Density

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Receiver shall produce a 12 decibel (dB) signal-plus-noise-to-noise ratio with a 1 kHz modulation tone at +/- 2.5 kHz deviation of the 25 kHz subcarrier at an optical power density of 26 picowatts per square millimeter measured at the receiver photosensor aperture.

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