Q.1
Modulation channel consists of
  • a) Amplifier
  • b) Signal processing units
  • c) Amplifier & Signal processing units
  • d) None of the mentioned
Q.2
Which are the common transmission media used in digital communication system?
  • a) Coaxial cable
  • b) Twisted copper cable
  • c) Radio frequency bands
  • d) All of the mentioned
Q.3
The basic transmission-reception system is a ______ system.
  • a) Two block system
  • b) Three block system
  • c) Four block system
  • d) None of the mentioned
Q.4
Modulation channel does not accept an analog input signal.
  • a) True
  • b) False
Q.5
If operating frequency bands are higher ______ is available.
  • a) Smaller bandwidth
  • b) Larger bandwidth
  • c) Smaller & Larger bandwidth
  • d) Cannot be determined
Q.6
Ground wave communication occurs in
  • a) Low frequency band
  • b) Medium frequency band
  • c) Low & Medium frequency band
  • d) None of the mentioned
Q.7
Sampling theorem is used for converting
  • a) Continuous time signal to discrete
  • b) Discrete to continuous time signal
  • c) Continuous time signal to discrete & vice versa
  • d) None of the mentioned
Q.8
A signal can be recovered from its sample by using
  • a) Low pass filter
  • b) High pass filter
  • c) Band pass filter
  • d) Band stop filter
Q.9
Which is practically realizable?
  • a) A train of pulses
  • b) Impulse train
  • c) All of the mentioned
  • d) None of the mentioned
Q.10
In flat top sampling scheme, ______ is kept constant after sampling.
  • a) Amplitude
  • b) Phase
  • c) Frequency
  • d) Time period
Q.11
Loop filter is a ______ used to reduce noise.
  • a) Low pass filter
  • b) High pass filter
  • c) Band pass filter
  • d) Band reject filter
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