Chapter 9 : Noise in Frequency Modulation Systems

1	The job of limiter in FM demodulation is to suppress noise associated with amplitude variation. Is that correct?
	A)	Yes
	B)	No
2	Does FM demodulation involve envelop detection stage used in AM demodulation?
	A)	Yes
	B)	No
3	The deemphasis filter comes after the FM demodulator and before baseband filter. Is that correct?
	A)	Yes
	B)	No
4	Preemphasis-deemphasis improves quality of both FM and AM transmission significantly. Is it true?
	A)	Yes
	B)	No, improves FM significantly
5	For white noise interference, is it true that noise power spectral density does not vary with frequency at receiver output for phase modulated system while increases in quadratic manner for FM system?
	A)	Yes
	B)	No
6	Does spike or clicking sound indicate onset of threshold in FM reception?
	A)	Yes
	B)	No
7	Is the spike output of a discriminator much larger if input carrier is modulated?
	A)	Yes
	B)	No
8	Does the frequency of spike increase if carrier-filter bandwidth increases?
	A)	Yes
	B)	No
9	The positive and negative spike in FM reception is related to swing of noise plus signal phasor around origin in clockwise and anticlockwise direction respectively. Is the statement correct?
	A)	Yes
	B)	No, Positive spike is for anticlockwise rotation and negative for clockwise rotation
10	In FMFB, bandpass filter bandwidth is less than carrier filter bandwidth and this factor contributes to FM threshold reduction. Is that true?
	A)	Yes
	B)	No