- Types of Modulation - frequency and amplitude
- Size of the antenna or aerial
- Effective power radiated by an antenna
- Mixing up of signals from different transmitters
- Communication Systems part 10 (Modulation)
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- Modulation of wave
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- Waves Analysis
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- Communication Systems part 11 (Factors affecting signal transmission)
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- Communication Systems part 14 (Pulse waves :- Modulation types)
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- Communication Systems part 12 (Carrier wave, Modulation types)
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A carrier wave of peak voltage 15 V is used to transmit a message signal. Find the peak voltage of the modulating signal in order to have a modulation index of 60%
Due to economic reasons, only the upper sideband of an AM wave is transmitted, but at the receiving station, there is a facility for generating the carrier. Show that if a device is available which can multiply two signals, then it is possible to recover the modulating signal at the receiver station.
State three important factors showing the need for translating a low frequency signal into a high frequency wave before transmission
The carrier wave is given by
C(t) = 2sin(8πt) volt.
The modulating signal is a square wave as shown. Find modulation index.
A carrier wave of peak voltage 12 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75%?
Draw a sketch of a sinusoidal carrier wave along with a modulating signal and show how these are superimposed to obtain the resultant amplitude modulated wave