Title :
Photoradio Apparatus and Operating Technique Improvements
Author :
Callahan, J.L. ; Whitaker, J.N. ; Shore, Henry
Author_Institution :
RCA Communications, Inc., New York City
Abstract :
A brief review of photoradio inception and progress up to 1928 is included in the introductory part of the paper. Improvements to terminal equipment which make possible greater fidelity of half-tone transmission over long-distance radio circuits are described. Radio circuit distortion is discussed and compensation methods suggested. A mathematical analysis of the photoradio keying is appended.
Keywords :
Alternators; Amplitude modulation; Circuits; Cities and towns; Facsimile; Fasteners; Optical modulation; Photoelectricity; Radio control; Radio transmitters;
Journal_Title :
Radio Engineers, Proceedings of the Institute of
DOI :
10.1109/JRPROC.1935.227939
