Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

460 FREQUENCY MODULATION, Volume IThis curve is shown in Figure 7. It should be noted that throughoutmost of its length this curve is practically linear. The total harmoniccontent represented by the curvature between the two dotted lines,and B, amounts to less than one per cent. The curvature above that iscaused by the nonlinearity of the discriminator resonance slope.AWhenthe Q of the discriminator coil is in the order of 200 (which is easy toattain at frequencies of 40 megacycles), and the mechanical vibrationapplied to the tip of the wire is ± 1 mil, the output from the diode