WorksheetsFrequency Modulation Quizz 1
Total questions: 10
Worksheet time: 5mins
The man behind the invention of frequency modulation is
Edwin Howard Armstrong
John Chowning
Reginald Fessenden
None of the above
Modulation index in frequency modulation can be determined by using
δf / fm
Am/fm
Am/Ac
Ac/fm
Noise immunity is superior in
Amplitude Modulation
Frequency Modulation
Phase Modulation
None of the above
In FM signals the amount of frequency deviated is dependent upon
Modulating frequency
Carrier frequency
Amplitude
Phase
Carson’s rule formula for bandwidth calculation is
fm
2fm (β+1)
2 fm
2(Δf+fm)
The Δf in the Carson’s rule stands for
Peak deviation in frequency
Required bandwidth
Highest frequency
Modulating frequency
Parameters constant in FM are
Amplitude
Phase
Frequency
Both a and b
FM broadcast requires ____________ max. Bandwidth for commercial uses.
100 KHz
200 KHz
300 KHz
400 KHz
The purpose of Guard bands in FM is to
Prevent adjacent channel interference
Increase bandwidth
Increase noise
Both b and c
Crystal controlled oscillator used in FM generation is to provide
Frequency deviation
Increase bandwidth
Increase noise
Frequency stability
