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Phase Modulation Question & Answers

June 7, 2022 By WatElectronics

This article lists 75 Phase Modulation MCQs for engineering students. All the Phase Modulation Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Phase Modulation.

Phase modulation is a type of modulation that is used for communicating signals, with the utmost transmission. PM can be used for both analog and digital data, but most of the digital transmission takes place.

Phase modulation is defined where the modulating/message signal is sampled by the phase carrier of the signal. Phase deviation takes place when two signal transmission takes place at different phases.

Different forms that exist in phase modulation using phase-shift keying are Binary phase-shift keying, Quadrature phase shift keying, offset phase shift keying, 8-point PSK, 16 point PSK.

Change of phase is equal to frequency. Phase modulation is widely used in wireless communications like W-fi, and GSM. The data rates are observed at speed due to information transmission is done without delay. In phase modulation, the components required are complex to design.

Upon the addition of the frequency multiplier, the modulation index is increased. Noise immunity is good in Phase modulation.

1). Phase modulation is a type of modulation used for the ______ of communicating signals.

Hint
2). Phase modulation has ___ forms of modulation.

Hint
3). Input signal in phase modulation changes according to ___ of a carrier wave.

Hint
4). h in phase modulation represents______?

Hint
5). Modulation index(h) formula=_______?

Hint
Read more about Modulation.
6). If height of the signals are short, then Phase modulation behaves similar to _____?

Hint
Read more about Amplitude Modulation.
7). For a high sine wave, Phase modulation behaves the same as _______?

Hint
Read more about Frequency Modulation.
8). Δθ represents _______?

Hint
9). Phase modulation is extensively used in transmitting _____ waves.

Hint
10). Carson rule formula represented by _______?

Hint

Phase Modulation Interview Questions and Answers

11). Message signal in phase modulation is represented by _____?

Hint
12). Phase modulation is used in technologies like ___?

Hint
13). Phase modulation is also used in _____?

Hint
14). Carrier signal formula in modulation are ______?

Hint
15). Message signal m(t) is represented by ______?

Hint
16). Phase modulation is also called ______ modulation?

Hint
17). Frequency modulation will change to phase modulation by appending ____ network to the message signal.

Hint
18)._____ phase modulation is most widely used.

Hint
19). Ac in the equation is defined as carrier signal ____?

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20). c in the equation is defined as carrier signal ______?

Hint
21). Movement of complete negative and _____ phases form a complete sine wave.

Hint
22). Phase is _____ proportional to time.

Hint
23). For phase modulation _____ be placed in the middle of AM and FM.

Hint
24). Noise exemption is less in phase modulation than _____?

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25). In PM, the Signal to Noise ratio is not _____ than FM.

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26). _____ services are mostly used in phase modulation?

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27). Noise immunity is ____ in PM, than that of AM.

Hint
28). Even if we increase the quality of frequency deviation, the noise immunity can’t increase in ___?

Hint

Phase Modulation MCQs for Exams

29). The whole power will make use of ___ modulators?

Hint
30). Bandwidth in PM depends on _______?

Hint
31). Bandwidth is high in ___ than AM and FM.

Hint
32). Receivers and transmitters are ____ to design in PM?

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33). Expand PSK _______?

Hint
34).Expand BPSK _____?

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35).Expand QPSK full form_______?

Hint
36). Phase modulation exists with _____ speed of communication?

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37). Exceeds phase range up to ____ due to uncertainty in PM?

Hint
38). Modulation index enlarges by adding _____ component.

Hint

Phase Modulation Quiz Questions and Answers.

39).______ exists between two points of a circle in PM.

Hint
40). Units of phase sensitivity ______?

Hint
41). Phase sensitivity is represented by _____?

Hint
42). Due to sound, combination ______ takes place in PM.

Hint
43). Phase modulation has constant _____?

Hint
44). Phase modulation has ___ quality receiving signals?

Hint
45). In PM, phase is directly proportional to ______?

Hint
46). In PM, amplitude and ______ maintain the same properties.

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47). Expand OPSK full form _____?

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48). Velocity is been identified based on unattached _____?

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49). In phase modulation, the ___ signals are required with phase variations in them.

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50).______ reaches if we increase the phase radian of modulation?

Hint

For More MCQs

  • Modulation Questions & Answers
  • Digital Modulation Questions & Answers
  • Frequency Modulation Questions & Answers
  • Amplitude Modulation Questions & Answers
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