An amplitude modulated signal is plotted below: Which one of the following best describes the above signal?
What is a modulating signal ?
Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?
Which of the following modulated signal has the best noise tolerance?
Write two basic modes of communication. Explan the process of amplitude modulation. Draw a schematic sketch showing how amplitude modulated signal is obtained by superposing a modulating signal over a sinusoidal carrier wave.
Suppose that the modulating signal is m(t)=2cos(2pif_(m)t) and the carrier signal is x_(c)(t)=A_(c)cos(2pif_(c)t) which one of the following is a conventional AM signal without over modulation
Assertion: AM detection is the process of recovering the modulating signal from amplitude modulated waveform wich is carried out using a rectifier and an evelope detector. Reason: Amplitude modulated waves can be produced by application of the message signal and the carrier wave to a non-linear device followed by band pass filter.
A sinusoidal carrier wave of amplitude 40 V is amplitude modulated by a sinusoidal signal voltage. What is the amplitude of each side band if the modulation index is 25%.
An audio signal represented as 25 sin 2pi ( 2000 t) amplitude modulated by a carrier wave : 60 sin 2pi (100,000)t . The modulation index of the modulated signal is
A 1 MHz carrier signal is modulated by a symmertrical sinusoidal wave for period of 100 mus in a nonlinear (square lae device).Which of the following frequencies will notbe present in the modulated signal
