Apparatus for transmitting digital data

Pulse or digital communications – Repeaters – Testing

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Details

250551, 455602, 455608, H04B 900, H04L 2210

Patent

active

046226818

ABSTRACT:
An apparatus is disclosed for transmitting digital data by radio frequency electromagnetic radiation, wherein the radio frequency transmitter of the digital data is electrically isolated from the source of the digital data. The radio frequency transmission is accomplished by symmetrical frequency modulation of a high frequency carrier, wherein the range of the symmetrical frequency modulation is responsive to the logical level of the digital data.

REFERENCES:
patent: 3903497 (1975-09-01), Stimler et al.
patent: 4034310 (1977-07-01), Coe
patent: 4149186 (1979-04-01), Chung et al.
patent: 4313227 (1982-01-01), Eder
patent: 4471355 (1984-09-01), Hardy et al.
patent: 4506233 (1985-03-01), Englund, Jr.

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