. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. PHASE DISTORTION AND PHASE DISTORTION CORRECTION 199 explicit time function is sometimes essential, in the last analysis, to indicate the degree of correction afforded. This information may be supplied to sufficient precision by the first and succeeding derivatives with respect to frequency of the steady state phase, which, as explained. vM Fig. 4—Distortion corrective circuit for long telegraph cable below, are extremely useful criteria of the improvement in the time
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. PHASE DISTORTION AND PHASE DISTORTION CORRECTION 199 explicit time function is sometimes essential, in the last analysis, to indicate the degree of correction afforded. This information may be supplied to sufficient precision by the first and succeeding derivatives with respect to frequency of the steady state phase, which, as explained. vM Fig. 4—Distortion corrective circuit for long telegraph cable below, are extremely useful criteria of the improvement in the time and steepness, respectively, of building-up over a finite range of frequencies. Nevertheless, to visualize the actual effect of the applied phase compensation upon the arrival current or voltage due to an impressed of a specific frequency requires the evaluation of the explicit time function. It is the object of this paper, following an analytical exposition of the theory of phase distortion, to consider various methods of phase distortion correction with particular reference to terminal phase com- pensating networks and the application of the lattice network to the loaded line as a terminal phase corrector. II. Phase Distortion 1. Steady State Theory of Phase Distortion The mathematical theory of phase distortion in signaling systems may be explained briefly from the steady state point of view. We suppose that it is required to transmit a signal /(/), which can be represented by the Fourier integral,. 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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