NASA NTRS · 19710000168
A frequency division multiplex technique for transmitting commands
Abstract
Reliable random access multiplexer is controlled and operated over two twisted-pair telephone lines at distances of 5.6 to 8.0 km with control signals of less than 10 volts rms. Technique adapts to any process or environmental control system where data source is necessary.
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Brey, H.. 1971-06-01. A frequency division multiplex technique for transmitting commands. https://ntrs.nasa.gov/citations/19710000168
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