Some Analysis of the WSMR Test Results on DSB

Abstract

The purpose of this paper is to relate results of ref. (1), the previous experimental paper, Double Sideband Suppressed Carrier System, by F. J. Schmitt, to theory and to the application of DSB/FM to wideband vibration type data. Inasmuch as the notch noise test was one of the basic tools for the laboratory investigation, the notch noise results and the DSB results are compared. Preliminary data on the effects of tape recording, including flutter, are discussed. Comparison of CBW FM/FM and DSB/FM for vibration telemetry is made on the basis of requirements outlined in ref. (2). The experimental data indicate a 13 to 18 db carrier power improvement of DSB/FM over FM/FM. Reasons for this improvement are given.