Accession Number : AD0430584


Title :   ANALYSIS OF AFSK-QFM TEST DATA.


Corporate Author : ITT COMMUNICATION SYSTEMS INC PARAMUS N J


Report Date : 24 Sep 1962


Pagination or Media Count : 5


Abstract : Ground-to-air transmissions are superior to airto-ground transmissions for both quenching frequency modulation (QFM) and automatic frequency shift keyers (AFSK) and for both equipments AN/ARC-65 and AN/ARC-58. Using 95% readability as a criterion, the composite results indicate that QFM percent of message readability is 79% for ground-to-air compared to 68% for air-toground. The AFSK percent message readability is 60% for ground-to-air and 45% for air-to-ground. (Author)


Descriptors :   *RADIO EQUIPMENT , FLIGHT TESTING , TRANSMISSIONS(MECHANICAL) , RADIOFREQUENCY , SURFACE TO AIR , AIR TO SURFACE , DIGITAL SYSTEMS , INTELLIGIBILITY , PERFORMANCE(ENGINEERING) , FREQUENCY SHIFT KEYERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE