NDLI: Linear modulator

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Linear modulator

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1972
Description	A study of frequency division multiplexing (FDM) systems was made for the purpose of determining the system performance that can be obtained with available state of the art components. System performance was evaluated on the basis of past experience, system analysis, and component evaluation. The system study was specifically directed to the area of FDM systems using subcarrier channel frequencies from 4 kHz to 200 kHz and channel information bandwidths of dc to 1, 2, 4, 8, and 16 kHz. The evaluation also assumes that the demodulation will be from a tape recorder which produces frequency modulation of + or - 1% on the signal due to the tape recorder wow and flutter. For the modulation system it is assumed that the pilot and carrier channel frequencies are stable to within + or - .005% and that the FM on the channel carriers is negligible. The modulator system was evaluated for the temperature range of -20 degree to +85 degree while the demodulator system was evaluated for operation at room temperature.
File Size	3057804
Page Count	86
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19720017625
Archival Resource Key	ark:/13960/t7hq8q57z
Language	English
Publisher Date	1972-04-01
Access Restriction	Open
Subject Keyword	Electronics Frequency Modulation Channel Capacity Temperature Effects Bandwidth Frequency Division Multiplexing Carrier Frequencies System Effectiveness Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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