Single Sideband Modulation MCQ’s

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This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Single Sideband Modulation”.

1. The spectrum space occupied by a DSB signal is the same as that of a conventional AM signal.
a) True
b) False

2. What is used to generate a DSB signal?
a) Balanced modulator
b) Carrier suppressor
c) Antimodulator
d) Sideband suppressor

3. The type of signal transmission in which no power is wasted on the carrier is known as ________
a) Amplitude modulation
b) Frequency modulation
c) Sideband suppressed carrier signal
d) Unsuppressed carrier

4. Which of the following is an advantage of SSB over DSB?
a) No change in spectrum space
b) Reduce in spectrum space
c) Carrier is suppressed
d) Power is not wasted on the carrier

5. Where does selective fading occur?
a) Attenuator
b) Amplifier
c) Atmosphere
d) Antenna

6. Which one of the following is not true with respect to SSB signal?
a) Hard to demodulate
b) Less power
c) Carrier is suppressed
d) Very low range

7. SSB transmitters are lighter and require less power than their normal AM transmitters.
a) True
b) False

8. Why is no carrier signal transmitted when the amplitude of the modulating signal is 0 in an SSB transmission?
a) Attenuation
b) Undermodulation
c) No sideband is generated
d) All the sideband is suppressed

9. The low power carrier transmitted with SSB signal is called as?
a) SSB carrier
b) Dummy carrier
c) Fake carrier
d) Pilot carrier

10. What is the maximum current if the peak envelope power is 500W and the supply to the amplifier is 50V?
a) 10A
b) 10mA
c) 550A
d) 550mA

11. What is the average power of the transmitter if PEP = 500W?
a) 0W to 500W
b) 100W to 300W
c) 125W to 166.66W
d) 0W to 250W

12. What is the peak envelope power if the rms voltage is 127.26V across a 50Ω load?
a) 324W
b) 321W
c) 215W
d) 154W

13. What is the PEP if the transmitter produces a peak to peak voltage of 178V across a 75Ω load?
a) 75.4W
b) 52.8W
c) 54.2W
d) 45.5W

14. Which of the following is true with respect to the bandwidth of a 2kHz audio signal and a 2kHz binary data?
a) Bandwidth is higher for audio signals than binary data
b) Bandwidth is higher for binary data than audio signals
c) Bandwidth remains the same for both
d) Bandwidth keeps increasing with time for the binary data

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