# RF Mixing MCQ’s

This set of Analog Communication Multiple Choice Questions & Answers (MCQs) focuses on “RF Mixing”.

1. Spectral density express ________

a) Average voltage

b) Average power in a waveform as a function of frequency

c) Average noise voltage

d) Average channel capacity

2. For a Gaussian process, auto correction also implies _________

a) Statistical dependance

b) Statistical independence

c) Statistical distribution

d) Ergodic process

3. For a periodic function, the spectral density and auto-correlation functions are ________

a) Laplace transform pair

b) Fourier transform pair

c) Gauss transform pair

d) Z-transform pair

4. What will be the value of modulation if we want maximum undistorted transmitted power?

a) 0

b) 1

c) 0.2

d) 0.5

5. The output stage of television transmitters is most likely to be a __________

a) Grid modulated class C amplifier

b) Grid modulated class A amplifier

c) Plate modulated class C amplifier

d) Plate modulated class A amplifier

6. A function f(x) is odd, when?

a) f(x) = -f(x)

b) f(x) = f(-x)

c) f(x) = -f(x)f(-x)

d) f(x) = f(x)f(-x)

7. For providing two or more voice circuits on the same carrier, we can use _________

a) SSB

b) ISB systems

c) DSB-SC

d) VSB

8. Modulation is used to separate differing transmission.

a) True

b) False

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