ECE :: Communication Systems
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In a TV, studio the function of vision switcher is to
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In the equation
of M-ary PSK signal (where Ey is symbol energy), M becomes large. Then d will approach -
The trapezoidal pattern of figure is obtained when examining an AM wave by an oscilloscope. Modulation factor of the wave is
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Y signal has maximum percentage of
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To ensure good transient response in audio systems the natural frequencies should be
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An AM signal and a narrowband FM signal with identical carriers, modulating signals and modulation index of 0.1 are added together. The resultant signal can be closely approximated by
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The equation v(t) = A cos [ωct + φ(t)] where A and ωc are constant and φ(t) is a function of base signal represents
- Phase modulation
- Amplitude modulation
- Angle modulation
- Frequency modulation
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An FM signal with deviation δ is passed through mixer. Its frequency is reduced five fold. The deviation in output of mixer is
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