Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

:2TRANSMISSION THROUGH A NETWORK 427—frequency characteristics of the network. At any instant of timethe frequency-modulated output wave deviates from the frequencymodulatedinput wave in amplitude and phase in a manner no differentfrom that of a steady-state output wave whose constant frequency isequal to the instantaneous frequency of the frequency-modulated wave.Letting the quasi-steady-state response envelope E 0UJ(&) approach/(to), equation (11),whereME mitlU) -»/(») ~ 2 (A m cos f „,* + B m sin ^)^m U)2-RmQU(21)0) — (0 ).(20)Equation (20) is equivalent to (15) if D m —>1 and \[/„— >$m % . The discrepancybetween the angles ^m and xj/^ is given by2-n-m 5> — o> 2-n-mvV^m 1 — i>m ?= U —