The Antennas Direct ClearStream TV Digital Tuner is a low-cost single-tuner ATSC digital TV receiver with transcoding support.
Antennas Direct does not manufacture the device, but sells and supports it.
The manufacturer of the device is Geniatech Inc., which acquired the TV streaming assets of Elgato Systems.
The FCC ID of the device is ZJU-1E7D4N
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The device has a UART along the bottom of the baseboard; the pinout for the UART debug port (left to right, coaxial input on right, LEDs face-down, toward you) is