|
Define the term modulation
|
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0
|
534
|
September 9, 2016
|
|
Define modulation index. Why is it kept low ? What is the role of a bandpass filter?
|
|
0
|
7017
|
September 9, 2016
|
|
Explain the terms (i) Attenuation and (ii) Demodulation used in Communication System
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0
|
1817
|
September 9, 2016
|
|
Distinguish between amplitude modulation and frequency modulation
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|
0
|
1180
|
September 9, 2016
|
|
How are side bands produced?
|
|
0
|
8213
|
September 9, 2016
|
|
Draw a schematic diagram showing the
|
|
1
|
1325
|
September 9, 2016
|
|
Mention three different modes of propagation used in communication system
|
|
1
|
4300
|
September 9, 2016
|
|
Distinguish between
|
|
1
|
2784
|
September 9, 2016
|
|
Describe briefly, by drawing suitable diagrams
|
|
1
|
1362
|
September 9, 2016
|
|
Which mode of propagation is used by shortwave broadcast services having frequency
|
|
1
|
12273
|
September 9, 2016
|
|
Write the factors that prevent a baseband signal of low frequency to be transmitted over long distances
|
|
1
|
3624
|
September 9, 2016
|
|
What is sky wave communication ? Why is this mode of propagation restricted to the frequencies only upto few MHz?
|
|
0
|
3587
|
September 9, 2016
|
|
(a) Identify the boxes, 'P' and 'Q' in the block diagram of a receiver shown in the figure:
|
|
1
|
806
|
September 9, 2016
|
|
Which mode of wave propagation is suitable
|
|
1
|
1628
|
September 9, 2016
|
|
Mention the function of any two of the following used in communication system:
|
|
1
|
1474
|
September 9, 2016
|
|
Distinguish between 'Analog and Digital signals'
|
|
0
|
1281
|
September 9, 2016
|
|
Block diagram of a receiver is shown in the figure
|
|
1
|
3075
|
September 9, 2016
|
|
Write the functions of the following in communication systems:
|
|
1
|
2936
|
September 9, 2016
|
|
The figure given below shows the block diagram of a generalized communication system. Identify the element labelled 'X' and write its function
|
|
1
|
1484
|
September 9, 2016
|
|
Give one example of point-to-point communication mode
|
|
0
|
1491
|
September 9, 2016
|
|
What is the meaning of the term 'attenuation' used in communication system?
|
|
0
|
1236
|
September 9, 2016
|
|
How does the effective power radiated from a linear antenna depend on the wavelength of the signal to be transmitted?
|
|
0
|
1908
|
September 9, 2016
|
|
Name the essential components of a communication system
|
|
0
|
3649
|
September 9, 2016
|