Frequency components of an AM wave (m = modulation index) areSelect one:a. Upper side band (ωc + ωm) having amplitude mA/2b. All of the abovec. Lower side band (ωc - ωm) having amplitude mA/2d. Carrier frequency (ωc ) with amplitude A
Question
Frequency components of an AM wave (m = modulation index) areSelect one:a. Upper side band (ωc + ωm) having amplitude mA/2b. All of the abovec. Lower side band (ωc - ωm) having amplitude mA/2d. Carrier frequency (ωc ) with amplitude A
Solution
The correct answer is b. All of the above.
An AM wave consists of three main components:
-
The carrier frequency (ωc) with amplitude A. This is the original, unmodulated frequency of the signal.
-
The upper side band (ωc + ωm) having amplitude mA/2. This is the frequency of the signal that is produced when the carrier frequency is modulated by the message signal. It is higher than the carrier frequency.
-
The lower side band (ωc - ωm) having amplitude mA/2. This is the frequency of the signal that is produced when the carrier frequency is modulated by the message signal. It is lower than the carrier frequency.
Therefore, all of the options a, c, and d are correct.
Similar Questions
Ex : For the AM waveform shown below, determine a) Peak amplitude of the upper and lower side frequencies b) Peak amplitude of the unmodulated carrier c) Peak change in the amplitude of the envelope d) Coefficient of modulation Percent modulation
AM WAVE MAY BE REPRESENTED AS E(T) COS ΩCT WHERE E(T) ISSelect one:a. ENVELOPE OF THE AM WAVEb. NONE OF THE ABOVEc. CARRIER SIGNALd. AMPLITUDE OF MODULATING SIGNAL
In AM, the modulation frequency should beSelect one:a. Anything will workb. Greater than fcc. Equal to fcd. Lower than fc
IF MODULATION INDEX IS GREATER THAN 1Select one:a. THE BASEBAND SIGNAL IS NOT PRESERVED IN THE ENVELOPE OF THE AM SIGNALb. ALL OF THE ABOVEc. THE RECOVERED SIGNAL IS DISTORTEDd. IT IS CALLED OVER MODULATION
In Frequency Modulation
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.