Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

24 FREQUENCY MODULATION, Volume 1C a /N = (C/2N)\ / F d /F a (fluctuation noise, r-m-s or peak values) (29)CJN = (C/2N)F d/F a (impulse noise, peak values). (30)These equations show that this increase in carrier fed to the frequencymodulation receiver not only increases the frequency modulation improvement,but also lowers the carrier-noise ratio received on theamplitude modulation receiver when the improvement threshold existsin the frequency modulation receiver.