Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

FREQUENCY-MODULATION FIELD TEST 145is extremely severe. Thus, under such conditions, FM-75 was the worstof the three types of modulation. It was concluded that in locationshaving strong diathermy interference, narrow band receiving systems§ § § ** S S»,S§ § § SillPEAK NOISE INPUT MICROVOLTSFig. 30would be far superior to others. It was also concluded that in locationshaving weak diathermy interference the wide band system would bemuch superior.Noise LevelsIn the foregoing, considerable data has been shown to indicate thefieldintensities which will provide good service for F-M and A-M sys-