Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

FM EXCITER 177The distortion inthe frequency-modulated output of the exciter isof the order of 0.5 per cent for modulating frequencies from 30 cyclesto 15,000 cycles. The noise level in the output is 74 decibels below 100-per-cent modulation.A schematic diagram of the new exciter unit is shown in Figure 12Figure 13 is a front view of the new exciter unit with the major componentsand controls identified. Figure 14 is a rear view of the exciterunit.Fig. 14In summary, the principal advantages of this new exciter unit are:(1) Its relative simplicity of circuit design.(2) Use of a minimum number of tubes.(3) Accurate frequency control.(4) Reliability of operation.(5) Excellent performance characteristics.(6) Ease of maintenance and service.