Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

38 FREQUENCY MODULATION, Volume Iignition system noise generator and the multivibrator generator. As acheck, readings on fluctuation noise were also taken which showed thatthe peak voltage of fluctuation noise varies as the square root of theband width.The final measurements on impulse noise were made using the sameprocedure followed for the fluctuation noise measurements of Fig. 9.Only peak voltage measurements were made on this type of noise. Thecurves are shown in Fig. 15. It can be seen that the peak voltage characteristicsof impulse noise are similar to those of fluctuation noiseexcept for the location of the improvement threshold. For the receiver