IndiaBIX

Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 14
21.
The main advantage of superheterodyne receiver is
better tracking
simple cut
better alignment
improvement in selectivity and sensitivity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
PAL system was proposed first in
USA
Japan
England
Germany
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
MCVF telegraphy causes
SSB techniques
pulse modulation
Out of bond signalling
FM
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Consider the following statements as regards noise
  1. If Gaussian noise is applied at input of a rectifier, the output is not gaussian
  2. The noise encountered on a telephone line consists of short, pulse type disturbances whose amplitude distribution is not Gaussian
  3. Shot noise results from random emission of electrons from a cathode
  4. Shot noise results from phenomenon associated with the flow of current across semi conductor junctions
Which of the above are correct?
1, 2, 3, only
1, 2, 4 only
1, 2, 3, 4
2, 3 only
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Noise can be reduced by increasing sampling rate
true
false
can't say
insufficient data
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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