Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

"COMMON- AND ADJACENT-CHANNEL INTERFERENCE 343The instantaneous frequency becomes:Id,, . to Id, x sin 2ttu1+ 9) = tt: + 5Z ^ tarrlf = 7T -r, M2t d< 2t 2i dl 1 + a; cos 27r[iito x cos 2ttu.< + x 2'zi + v--2ir ^ 1 + z 2 + 2z cos 271-fj.Z=_^ !^_2tt cos 2ttjj.< + 1/xcos 2ir\±t + x1 30This is valid for all values of x.to:For a balanced linear discriminator, the audio output is proportionalOutput oc(icos2^+l/% 1cos 2-K\d + x(31)When x«l, this is,approximately,Output