Accession Number : AD0282528

Title :   ELECTRONIC EQUIPMENT INTERFERENCE CHARACTERISTICS--COMMUNICATION TYPE

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : BAILEY,R.N. ; HOLEY,J.G. ; WOOD,E.W.

Report Date : 31 MAY 1962

Pagination or Media Count : 1

Abstract : The spectra of harmonics of modulated signals are discussed and illustrated with photographs. It is concluded that the spectrum of a harmonic for the typical transmitter is influenced greatly by transmitter tuning. Errors in the measurement of spurious and harmonic emissions are discussed and methods are given for data verification and preclusion of errors. Factors which affect spurious responses and some techniques for their reduction are briefly discussed. A carrier cancellation technique for extending the dynamic range of spectrum analyzers is proposed. Complete design and test information are given. Experimental results using the carrier cancellation device for measurement of carrier noise and sideband splatter are discussed and illustrated. It is concluded that use of this technique results in an effective increase in spectrum analyzer dynamic range to more than eighty decibels. (Author)

Descriptors :   *COMMUNICATION AND RADIO SYSTEMS, *COMMUNICATION AND RADIO SYSTEMS, *RADIO INTERFERENCE, DIODES, ELECTRONIC EQUIPMENT, FREQUENCY MODULATION, HARMONIC ANALYSIS, MODULATION, PULSE COMMUNICATIONS, RADIOFREQUENCY AMPLIFIERS, SIGNAL-TO-NOISE RATIC

Distribution Statement : APPROVED FOR PUBLIC RELEASE