Time Left - 10:00 mins
BARC 2018 ECE: Communication Nuclear Quiz 2
Attempt now to get your rank among 669 students!
Question 1
A DSB signal s(t) with full carrier is shown in figure below:
The total power of the modulated signal (in W) and the amplitude of the additional carrier (in V) which must be added to the waveform to attain a modulation index of 20% respectively are:
The total power of the modulated signal (in W) and the amplitude of the additional carrier (in V) which must be added to the waveform to attain a modulation index of 20% respectively are:
Question 2
A low pass signal m(t) band limited to BHz is sampled by a periodic rectangular pulse train,
of period 
Assuming natural sampling and that the pulse amplitude and pulse amplitude and pulse width are A volts and 1/30B sec respectively an expression for frequency spectrum of the sampled signal 
is
of period Assuming natural sampling and that the pulse amplitude and pulse amplitude and pulse width are A volts and 1/30B sec respectively an expression for frequency spectrum of the sampled signal is Question 3
A time domain energy signal is defined as 
with energy equal to 12 Joule then the energy of the signal
is equal to
with energy equal to 12 Joule then the energy of the signalis equal to Question 4
An M-level PSK modulation scheme is used to transmit independent binary digits over a band-pass channel with bandwith 100 KHz. The bit rate is 200 Kbps and the system characteristics is a raised cosine spectrum with 100% excess band width. The minimum value of M is ___________
Question 5
A standard television picture is composed of approximately 300000 basic picture elements. Each of these elements can assume 10 distinguishable brightness levels with equal probability. The information content of a television picture frame is ________ k bits.
- 669 attempts
- 4 upvotes
- 12 comments
May 20ESE & GATE EC
