Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 372
d to cable signalling, twohypothetical frequencies for an equivalent sine wave wouldbe recognizable, namely: the dot-frequency, as outlinedin the foregoing chapter, and the reversal-frequency, as SUBMARINE TELEGRAPHY 357 indicated in Fig. 3; the former being twice as high as thelatter. Kennelly*… … Fig- 3. ment for greatest sensitiveness should have a resistanceequal to the resistance component of the surge impedanceof the cable plus the resistance component of reactiveapparatus, if any, in the receiving circuit. The surgeimpedance, from § 4 of Chap. X, being in general or jR+jpL becomes y…
Telegraph
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