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Showing posts with the label AM waves related

Problem /solution related to AM waves

An amplitude modulated waveform has the form x1((t)= 10[1+0.5 cos (2000*pi*t)+ 0.5 cos (4000*pi*t)] cos(20000*pi*t). determine the followings. i)                     Sketch the amplitude spectrum of x(t) ii)                    Find the average power content of each spectral component including the carrier iii)                  Modulation index

Problem /solution related to AM waves

A carrier wave 4 sin(2*pi*500*10^3*t) volts is amplitude modulated by an audio wave [0.2 sin(3*2*pi*500*t) + 0.1 sin(5*2*pi*500*t)] volts. Determine the upper and lower sideband and sketch the complete spectrum of the modulated wave. Estimate the total power in the side bands.

Problem /solution related to AM waves

A 100 kHz carrier is simultaneously modulated by 300Hz, 800Hz and 2 kHz audio sine wave. What will be the frequency content of Am signal.

Problem /solution related to AM waves

An audio frequency signal 5 sin(2*pi*100*t) is used to amplitude modulated a carrier of 100sin(2*pi*10^6*t).Assume modulation index of 0.4 . Find i)                     Sideband frequency ii)                    Bandwidth required iii)                  Amplitude of the each sideband] iv)                  Total power delivered to a load of 100 ohm.

Problem /solution related to AM waves

Consider a two stage SSB modulator where the message signal occupies a band of 0.3kHz to 4kHz and two carrier frequencies are f1=10kHz and f2=100kHz. Evaluate the following: I)                     Sideband of DSB-SC modulated waves at the output of product modulator II)                   The sidebands of SSB the modulated waves at the output of BPF III)                 The   pass band and guard band of the two BPF IV)                The order of the two filters assuming at least 15dB attenuation between the pass band and stop band V)                  Sketch the spectrum of the signal at each stage. http://subashelectroman.ga

Problem /solution related to AM waves

The antenna current of an AM broadcast transmitter modulated to a depth of 40% by an audio sine wave is 11A. It increases to a 12 A as a result of sinusoidal, modulated by another audio sine wave. What is the modulation index due to second wave.\