English

A Signal of 5 kHz Frequency is Amplitude Modulated on a Carrier Wave of Frequency 2 MHz. What Are the Frequencies of the Side Bands Produced? - Physics

Advertisements
Advertisements

Question

A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. What are the frequencies of the side bands produced?

Advertisements

Solution

The frequencies of the side bands produced are

Maximum frequency: 5 kHz + 2 MHz

=5 x 10-3 MHz + 2 MHz

=0.005 + 2 = 2.005 MHz

shaalaa.com
  Is there an error in this question or solution?
2015-2016 (March) All India Set 3 N

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Explain any two factors that justify the need of modulating a low-frequency signal.


A modulating signal is a square wave, as shown

The carrier wave is given by  `c(t) = 2 sin (8pit) "volts"`

(i) Sketch the amplitude modulated waveform

(ii) What is the modulation index?


For an amplitude modulated wave, the maximum amplitude is found to be 10 V while the minimum amplitude is found to be 2 V. Determine the modulation index μ. What would be the value of μ if the minimum amplitude is zero volt?


The frequencies of two side bands in an AM wave are 640 kHz and 660 kHz respectively. Find the frequencies of carrier and modulating signal. What is the bandwidth required for amplitude modulation?


Define the term 'amplitude modulation'


Write two advantages of frequency modulation over amplitude modulation.


Compute the LC product of a tuned amplifier circuit required to generate a carrier wave of 1 MHz for amplitude modulation.


Draw the plot of amplitude versus ‘ω’ for an amplitude modulated wave whose carrier wave (ωc) is carrying two modulating signals, ω1 and ω22 > ω1). 

  1. Is the plot symmetrical about ωc? Comment especially about plot in region ω < ωc.
  2. Extrapolate and predict the problems one can expect if more waves are to be modulated.
  3. Suggest solutions to the above problem. In the process can one understand another advantage of modulation in terms of bandwidth?

An amplitude-modulated wave is represented by Cm(t) = 10(1 + 0.2 cos 12560t) × sin (111 × 104t) volts. The modulating frequency in kHz will be ______.


The maximum amplitude for an amplitude modulated wave is found to be 12V while the minimum amplitude is found to be 3V. The modulation index is 0.6x where x is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×