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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 11
16.
In amplitude modulation the rms value of radio frequency voltage after 40% modulation is 60 mV. If modulation is 80% the rms value after modulation will be about
50 mV
60 mV
66 mV
80 mV
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
1 GHz is equal to
106 Hz
108 Hz
109 Hz
1010 Hz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Consider the following statements
  1. In a pulsed radar, the transmitted pulses are of high frequency
  2. In a pulsed radar, the transmitted pulses are of high power
  3. In a pulsed radar, the transmitted pulses are of brief duration
  4. In a pulsed radar, the transmitted pulses are of square wave shape.
Of the above statements the correct statements are
1 only
1, 2 and 3 only
1, 2, 3, 4
1 and 3 only
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Probability density function of thermal noise is
Poisson
Binomial
Gaussian
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
In a colour TV receiver AFT stands for
Automatic Fine Tuning
Automatic Frequency Tuning
Automatic Field Tuning
Alignment Frequency Tuning
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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