Title :
Frequency-Shift Radio Transmission
Author :
Hatfield, Lester E.
Author_Institution :
Hazeltine Electronics Corp., Little Neck, L. I., N.Y.
Abstract :
The different methods of obtaining carrier-frequency shift of communications transmitters are described, as well as the results of using the different methods, and the final model that has proved satisfactory for this type of service.
Keywords :
Circuits; Frequency modulation; Frequency shift keying; Oscillators; Printers; RF signals; Radio frequency; Radio transmitters; Signal design; Telegraphy;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1948.231245
