Hall Research HR-101-S - Manual (Page 4)

MIC Preamp/Audio over Single Fiber
4
The stereo line input is on a standard 3.5mm (1/8 inch) connector which
gets mixed with the amplified microphone signal.
In a typical application a presenter can hookup the audio from their PC to
the line input and plug the mic to the XLR. The unit will mix the speakers
voice with the PC audio.
The HR-101-S has both stereo analog (on 3.5mm) and SPDIF digital (on
RCA) outputs as well as a fiber-optic ST connector for driving long
cables to 3,280 ft. to compatible receiver.
HR-101-S Functional Block Diagram
HR-101-S Front and Rear views
The HR-101 can extend an audio over a single multi-mode fiber optic
cable spanning distances of over 1000m (3280ft). For lengths of upto 500