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Why is an AM signal likely to be more noisy than a FM signal upon transmission through a channel?
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|
0
|
2540
|
December 10, 2016
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|
Compute the L-C product of a tuned amplifier circuit required to generate a, carrier wave of 1 MHz for amplitude modulation
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0
|
1164
|
December 10, 2016
|
|
In the given block diagram of a receiver, identify the boxes labelled as X and Y and write their functions
|
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1
|
2259
|
December 10, 2016
|
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Define modulation index.Why is its value kept,in practice less than one?
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1
|
6120
|
December 10, 2016
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A modulating signal is a square wave as shown in the figure
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1
|
2771
|
December 10, 2016
|
|
An amplitude modulated wave is as shown in the figure. Calculate
|
|
1
|
2520
|
December 10, 2016
|
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Write physical significance of modulation index
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0
|
8044
|
December 10, 2016
|
|
Which mode of propagation is used by short wave
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|
1
|
3393
|
December 10, 2016
|
|
For ground wave transmission, size of antenna l should be comparable to wavelength of the signal
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1
|
3161
|
December 10, 2016
|
|
Distinguish between any two types of propagation of electromagnetic waves
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|
1
|
7150
|
December 10, 2016
|
|
If the sum of the heights of transmitting and receiving antenna
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|
1
|
4712
|
December 10, 2016
|
|
Why is communication using line of sight mode
|
|
1
|
2536
|
December 10, 2016
|
|
Which mode of propagation is suitable for television broadcast
|
|
1
|
4673
|
December 10, 2016
|
|
Why is this mode of propagation limited to frequencies upto a few MHz?
|
|
1
|
1093
|
December 10, 2016
|
|
What is the range of frequencies used for TV transmission?
|
|
1
|
4508
|
December 10, 2016
|
|
What fraction of the surface area of the earth
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|
1
|
2205
|
December 10, 2016
|
|
“A communication satellite is essentially a repeater station in space.”
|
|
1
|
1602
|
December 10, 2016
|
|
Distinguish between sinusoidal and pulse-shaped signals
|
|
1
|
2776
|
September 9, 2016
|
|
A (sinusoidal) carrier wave
|
|
1
|
2362
|
September 9, 2016
|
|
Write three important factors which justify the need of modulating
|
|
1
|
2568
|
September 9, 2016
|
|
Write two basic modes of communication
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|
1
|
5002
|
September 9, 2016
|
|
Draw a block diagram of a detector for AM signal and show,
|
|
1
|
5570
|
September 9, 2016
|
|
Explain any two factors which justify the need of modulating a low frequency signal
|
|
1
|
7192
|
September 9, 2016
|
|
Define modulation index
|
|
1
|
6893
|
September 9, 2016
|
|
A carrier wave of peak voltage 12 V is used to transmit a message signal
|
|
1
|
6683
|
September 9, 2016
|
|
In the block diagram of a simple modulator for obtaining
|
|
1
|
4691
|
September 9, 2016
|
|
Describe briefly the three factors which justify
|
|
1
|
2847
|
September 9, 2016
|
|
A carrier wave of peak voltage 12 V is used to transmit
|
|
1
|
596
|
September 9, 2016
|
|
A carrier wave of frequency 1.5 MHz and amplitude
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|
1
|
4517
|
September 9, 2016
|
|
A message signal of frequency
|
|
1
|
2114
|
September 9, 2016
|