. The Bell System technical journal . ,. Fig. 29 — Effect of slow cosine variation in amplitude characteristic whenamplitude at zero frequency is held constant. THEORETICAL FUNDAMENTALS OF PULSE TRANSMISSION 767 structure departures a(w) in the transmission characteristic and luMicethe coefficients Oi , 02 ■ ■ • a,,, • • • will l)c small. In the above representation .lo(w) can also he refi;arded as th(> ampli-tude characteristic of a terminal network or as the frequency spectrumof a pulse applied to a transmission system witfi an amplitude charact-teristic/(oj) = 1 + «(co). In a Fourier ser
. The Bell System technical journal . ,. Fig. 29 — Effect of slow cosine variation in amplitude characteristic whenamplitude at zero frequency is held constant. THEORETICAL FUNDAMENTALS OF PULSE TRANSMISSION 767 structure departures a(w) in the transmission characteristic and luMicethe coefficients Oi , 02 ■ ■ • a,,, • • • will l)c small. In the above representation .lo(w) can also he refi;arded as th(> ampli-tude characteristic of a terminal network or as the frequency spectrumof a pulse applied to a transmission system witfi an amplitude charact-teristic/(oj) = 1 + «(co). In a Fourier series analysis of the deviation in the amplitude charac-teristic, the fimdamental period of the amplitude variation would beselected so that there is one complete cycle betAveen — coi and a;i, thecutoff frequency, in which case ojit = tt or rT = — COi This is the interval between pulse echoes when the amphtude charac-teristic is represented by (). It is identical with the interval ri givenby () at which pulses c
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
