
Accession Number : AD0287483
Title : DEMODULATION OF A SPECIAL AMFM SIGNAL
Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ENGINEERING EXPERIMENT STATION
Personal Author(s) : DEARHOLT,DONALD W.
Report Date : SEP 1960
Pagination or Media Count : 1
Abstract : AD287 483Div. 8 U (TISTE/CAM) OTS price $7.60 New Mexico U. Engineering Experiment Station, Albuquerque. DEMODULATION OF A SPECIAL AMFM SIGNAL, by Donald W. Dearholt. Sep 60, 64p. incl. illus. 5 refs. (Technical rept. no. EE34) (Contract DA 29040ORD1238) Unclassified report DESCRIPTORS: *Signal generators, *Transducers, *Detection, *Modulation, Radiofrequency, Radio signals, Amplitude modulation, Tuning circuits, Pulse discriminators, Pulse modulation, Elec tronic circuits, Mathematical analysis, Theory, ntegaion, Waveform generators. The problem of demodulation of a signal obtained from a special generator and a special class of transducers is considered. The swept frequency range of the generator is chosen so that the resonant frequency of the transducer ies within this range for all anticipated values of the parameter to be measured. The generator output is applied to the transducer so that an amplitude pek ocurs every time the generator frequency pses through the resonant frequency of the transducer. Demodulation is considered complete if correct relative values of the resonant frequency of the transducer are obained. Possible souces of error in the peak marking circuit are considered, and ways of minimizing different types of error are discussed. Results obtained from an experimentl peak mrking circuit are compred with theoretical reults. (Author)
Descriptors : *DETECTION, *MODULATION, *SIGNAL GENERATORS, *TRANSDUCERS, AMPLITUDE MODULATION, CIRCUITS, NUMERICAL INTEGRATION, MATHEMATICAL ANALYSIS, PULSE DISCRIMINATORS, PULSE MODULATION, RADIO SIGNALS, RADIOFREQUENCY, THEORY, TUNING DEVICES, WAVEFORM GENERATORS
Distribution Statement : APPROVED FOR PUBLIC RELEASE