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ESE EC : Communications Champion Quiz 2
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Question 1
Which one of the following is an indirect way of generation FM?
Question 2
FM broadcast standards specify a maximum deviation of frequency to be equal to 75 kHz and a maximum modulation frequency of 15 kHz. What is the modulation index for FM wave?
Question 3
In FDM systems used for telephone, which modulation scheme is adopted?
Question 4
Which one of the following blocks is not common in both AM and FM receivers?
Question 5
A composite signal XC(t) is expressed as:
XC(t) = Accosωct - Amcos(ωc - ωm)t + Amcos(ωc+ωm)t
Which of the following methods can be employed to retrieve the sinusoidal component at ωm from Xc?
XC(t) = Accosωct - Amcos(ωc - ωm)t + Amcos(ωc+ωm)t
Which of the following methods can be employed to retrieve the sinusoidal component at ωm from Xc?
Question 6
A single tone 4 kHz message single is sampled with 10 kHz and 6 kHz. Aliasing effect will be seen in the reconstructed signal when the signal is sampled with.
Question 7
The power contained in single sideband in amplitude modulation is
Question 8
Amplitude modulation is used by broadcasting because
Question 9
IF a 400 Walt carrier is amplitude modulated to a depth of 75 percent, what is the total power in the modulated wave?
Question 10
An AM signal with a carrier of 1 kW has 200 W in each side band. The percentage of modulation is.
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Feb 26ESE & GATE EC