. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. PHASE DISTORTION AND PHASE DISTORTION CORRECTION 209 is also a constant resistance of the same value as the characteristic impedance of the Hne. A number of general recurrent networks of the so-called ' constant resistance' type ^^ are known and such a o I WWWr Ri :R2 v(u)) Fig. 11—Phase distortion corrective circuit for loaded cable. For 20 miles of 19 gauge H-44-25 loaded cable, r + R2 = 5000 ohms, Ri = 101,000 ohms, L = henry, C = microfarad. network 1°
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. PHASE DISTORTION AND PHASE DISTORTION CORRECTION 209 is also a constant resistance of the same value as the characteristic impedance of the Hne. A number of general recurrent networks of the so-called ' constant resistance' type ^^ are known and such a o I WWWr Ri :R2 v(u)) Fig. 11—Phase distortion corrective circuit for loaded cable. For 20 miles of 19 gauge H-44-25 loaded cable, r + R2 = 5000 ohms, Ri = 101,000 ohms, L = henry, C = microfarad. network 1° has been applied to correct the distortion on the submarine cable. The arrangement is shown in Fig. 12. It will be observed that Zu and Z21 are inverse networks of impedance product R?-, that. Fig. 12—Constant resistance type corrective circuit for long telegraph cable. m^ represents distortionless amplifier is, Zii22i = R^, which is, in general, the requisite relation among the network constants to provide a constant resistance characteristic impedance, R. In practical performance the networks of Figs. 8 and 12, each having the basic arrangement Sn, are equivalent. Thus the ^^ See reference 11. 14. 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
