Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

INTERMEDIATE-FREQUENCY VALUES 251mediate frequency is the same for the oscillator frequency higher orlower than the tune frequency. Further, the spurious responses dueto second harmonics of signal and oscillator go to zero at an intermediatefrequency of 16 megacycles and do not recur at any higherintermediate frequency. The spurious responses due to the third harmonicof signal and oscillator drop out at an intermediate frequencyof 12 megacycles, while the spurious responses due to the fourth harmonicof signal and oscillator drop out at 10.6 megacycles.When different harmonic orders of signal and oscillator are involved,the number of spurious responses is different when the oscillatorfrequency is higher than the tune frequency than that for the oscillatorfrequency lower than the tune frequency.5