21. FM can be produced using a phase modulator. Group of answer choices True False 22. In PM, frequency deviation is directly proportional to the amplitude of the modulating signal. Group of answer choices True False 23. The lowest frequency deviation in the carrier occurs during the zero-crossing points of the modulating signal. Group of answer choices True False
21. FM can be produced using a phase modulator.
Group of answer choices
True
False
22. In PM, frequency deviation is directly proportional to the amplitude of the modulating signal.
Group of answer choices
True
False
23. The lowest frequency deviation in the carrier occurs during the zero-crossing points of the modulating signal.
Group of answer choices
True
False
24. Modifying the frequency of the carrier produces frequency modulation.
Group of answer choices
True
False
25. FM produced by a phase modulator is called indirect FM.
Group of answer choices
True
False
26. The modulating signal for stereophonic subcarrier shall be equal to the sum of the left and right signals.
Group of answer choices
True
False
27. The amplitude of the modulating signal determines the frequency deviation in the carrier.
Group of answer choices
True
False
28. Phase shift is indirectly proportional to the amplitude of the modulating signal.
Group of answer choices
True
False
29. Phase modulators produce a phase shift which is just a time separation between two sine waves of the same frequency.
Group of answer choices
True
False
30. The maximum frequency deviation in the PM signal occurs during the peak amplitude of the modulating signal.
Group of answer choices
True
False
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