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BELL SYSTEM TECHNICAL JOURNAL 



the carrier is suppressed approximately 20 db in the modulator and about 

 15 db more in the filter. In order to obtain a variable amplitude of 

 carrier for experimental purposes, an arrangement was provided for 

 by-passing a variable quantity of the carrier around the first modulator 

 and low-frequency filter. The single-sideband voltage obtained from 



Fig. 1 — Rear view of single-sideband transmitting input etiuipnient. 



