Question 1

For a phase modulated signal, the frequency deviation is proportional to

Accepted Answer

A) frequency only 
B) amplitude only 
C) only width 
D) phase only 
A) frequency only 
B) amplitude only 
C) only width 
D) phase only

Question 2

Which is a quantization process?

Accepted Answer

A) rounding 
B) truncation 
C) rounding & truncation 
D) none of the mentioned 
A) rounding 
B) truncation 
C) rounding & truncation 
D) none of the mentioned

Question 3

Frequency modulated signal is regarded as the phase modulated signal in which the modulating wave is differentiated before modulation.

Accepted Answer

A) True 
 B)False

Question 4

PLL in FM detection stands for_________

Accepted Answer

A) phase locked loop 
B) programmable logic loop 
C) phase locked logic 
D) programmable locked loop 
A) phase locked loop 
B) programmable logic loop 
C) phase locked logic 
D) programmable locked loop

Question 5

For a low level AM system, amplifier modulated stage must have_________

Accepted Answer

A) harmonic devices 
B) linear devices 
C) non-linear devices 
D) class a amplifiers 
A) harmonic devices 
B) linear devices 
C) non-linear devices 
D) class a amplifiers

Question 6

Carrier wave in modulation is a resultant wave.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following frequency is not transmitted in AM transmission?

Accepted Answer

A) upper side band frequency 
B) carrier frequency 
C) lower side band frequency 
D) audio frequency 
A) upper side band frequency 
B) carrier frequency 
C) lower side band frequency 
D) audio frequency

Question 8

Which polarization is used to reduce the depolarization effect on received waves?

Accepted Answer

A) circular polarization 
B) linear polarization 
C) atomic polarization 
D) dipolar polarization 
A) circular polarization 
B) linear polarization 
C) atomic polarization 
D) dipolar polarization

Question 9

Which conveys more information?

Accepted Answer

A) high probability event 
B) low probability event 
C) high & low probability event 
D) none of the mentioned 
A) high probability event 
B) low probability event 
C) high & low probability event 
D) none of the mentioned

Question 10

Frequency modulation index defines the relationship between the_________  and bandwidth of transmitted signal.

Accepted Answer

A) frequency of message signal 
B) amplitude of message signal 
C) amplitude of carrier signal 
D) frequency of carrier signal 
A) frequency of message signal 
B) amplitude of message signal 
C) amplitude of carrier signal 
D) frequency of carrier signal

Question 11

Which of the following is the ratio of the throughput data rate per Hertz?

Accepted Answer

A) bandwidth efficiency 
B) spectral density 
C) power efficiency 
D) power density 
A) bandwidth efficiency 
B) spectral density 
C) power efficiency 
D) power density

Question 12

What is number of possible outputs if there is 7 line digital input?

Accepted Answer

A) 64 
B) 32 
C) 16 
D) 128 
A) 64 
B) 32 
C) 16 
D) 128

Question 13

Spread spectrum is used for

Accepted Answer

A) encrypting signal 
B) hiding signal 
C) encrypting & hiding signal 
D) none of the mentioned 
A) encrypting signal 
B) hiding signal 
C) encrypting & hiding signal 
D) none of the mentioned

Question 14

Phase array radar can track many targets together.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is not necessarily an advantage of FM over AM?

Accepted Answer

A) less modulating power is required 
B) better noise immunity is provided 
C) higher bandwidth is required 
D) carrier is of any shape 
A) less modulating power is required 
B) better noise immunity is provided 
C) higher bandwidth is required 
D) carrier is of any shape

Question 16

A cordless telephone that uses separate frequencies for transmission in base and portable units is called_________

Accepted Answer

A) half duplex 
B) duplex 
C) simplex 
D) one-way communication 
A) half duplex 
B) duplex 
C) simplex 
D) one-way communication

Question 17

A duplex arrangement use separate frequencies for transmission.

Accepted Answer

A) True 
 B)False

Question 18

What is the bandwidth required in SSB signal?

Accepted Answer

A) fm B) 2fm C) > 2fm D) < 2fm A) fm B) 2fm C) > 2fm D) < 2fm

Question 19

The upper and lower sideband frequencies for 5KHz amplitude modulation with a 30KHz carrier frequency will be?

Accepted Answer

A) 35khz and 25khz 
B) 34khz and 24khz 
C) 25khz and 35khz 
D) 0.35khz and 0.25khz 
A) 35khz and 25khz 
B) 34khz and 24khz 
C) 25khz and 35khz 
D) 0.35khz and 0.25khz

Question 20

Inductance and capacitance of a line is 0.8

Accepted Answer

A) 158 
B) 166 
C) 143 
D) 127 
A) 158 
B) 166 
C) 143 
D) 127

For a phase modulated signal, the frequency deviation is proportional to

Which is a quantization process?

Frequency modulated signal is regarded as the phase modulated signal in which the modulating wave is differentiated before modulation.

PLL in FM detection stands for_________

For a low level AM system, amplifier modulated stage must have_________

Carrier wave in modulation is a resultant wave.

Which of the following frequency is not transmitted in AM transmission?

Which polarization is used to reduce the depolarization effect on received waves?

Which conveys more information?

Frequency modulation index defines the relationship between the_________ and bandwidth of transmitted signal.

Which of the following is the ratio of the throughput data rate per Hertz?

What is number of possible outputs if there is 7 line digital input?

Spread spectrum is used for

Phase array radar can track many targets together.

Which of the following is not necessarily an advantage of FM over AM?

A cordless telephone that uses separate frequencies for transmission in base and portable units is called_________

A duplex arrangement use separate frequencies for transmission.

What is the bandwidth required in SSB signal?

The upper and lower sideband frequencies for 5KHz amplitude modulation with a 30KHz carrier frequency will be?

Inductance and capacitance of a line is 0.8

Information Theory and Communication Techniques

Waveform Logic, Pcm Encoding, Vocoder Analysis, and Antenna Radiations

Microwave Communication and Modulation

M-Ary Signalling and Pulse Shaping Techniques

Signal Filtering and Equalization Techniques

Information Theory and Coding Techniques

Channel Coding and Error Correction Techniques

Algorithms and Techniques for Communication System Security and Error Correction

Modulation Schemes and Access Techniques for Spread Spectrum Systems

Digital and Analog Telecommunications Standards

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Exam 1: Modulation and Demodulation Techniques

For a phase modulated signal, the frequency deviation is proportional to

Which is a quantization process?

Frequency modulated signal is regarded as the phase modulated signal in which the modulating wave is differentiated before modulation.

PLL in FM detection stands for_________

For a low level AM system, amplifier modulated stage must have_________

Carrier wave in modulation is a resultant wave.

Which of the following frequency is not transmitted in AM transmission?

Which polarization is used to reduce the depolarization effect on received waves?

Which conveys more information?

Frequency modulation index defines the relationship between the_________ and bandwidth of transmitted signal.

Which of the following is the ratio of the throughput data rate per Hertz?

What is number of possible outputs if there is 7 line digital input?

Spread spectrum is used for

Phase array radar can track many targets together.

Which of the following is not necessarily an advantage of FM over AM?

A cordless telephone that uses separate frequencies for transmission in base and portable units is called_________

A duplex arrangement use separate frequencies for transmission.

What is the bandwidth required in SSB signal?

The upper and lower sideband frequencies for 5KHz amplitude modulation with a 30KHz carrier frequency will be?

Inductance and capacitance of a line is 0.8

Information Theory and Communication Techniques

Waveform Logic, Pcm Encoding, Vocoder Analysis, and Antenna Radiations

Microwave Communication and Modulation

M-Ary Signalling and Pulse Shaping Techniques

Signal Filtering and Equalization Techniques

Information Theory and Coding Techniques

Channel Coding and Error Correction Techniques

Algorithms and Techniques for Communication System Security and Error Correction

Modulation Schemes and Access Techniques for Spread Spectrum Systems

Digital and Analog Telecommunications Standards

Filters