. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 172 BELL SYSTEM TECHNICAL JOURNAL system here employed, however, this steady frequency is practically eliminated so that when there is no speech to be transmitted practically no energy whatever leaves this antenna. Furthermore, in ordinary. Fig. 5—A picture of Rocky Point sending antenna transmission when there is, say, a 1,000-cycle tone to the voice, this appears in the transmission as two frequencies 1,000 cycles above and 1,000 cycles below the carrier frequency. T
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 172 BELL SYSTEM TECHNICAL JOURNAL system here employed, however, this steady frequency is practically eliminated so that when there is no speech to be transmitted practically no energy whatever leaves this antenna. Furthermore, in ordinary. Fig. 5—A picture of Rocky Point sending antenna transmission when there is, say, a 1,000-cycle tone to the voice, this appears in the transmission as two frequencies 1,000 cycles above and 1,000 cycles below the carrier frequency. This evidently is an in- effective use of the available frequencies so that one of the so-called frequency side bands in this system is eliminated. In this way a single tone in the voice is represented by a single frequency in the trans- mission from the station. A further frequency economy by the use of the same frequency range for talking in two directions is brought out Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
