This set of Analog Communications Multiple Choice Questions & Answers (MCQs ) focuses on “Generation of DSBSC Waves”. 1. LCD uses. Page 1. Lecture Generation of DSBSC waves: balanced modulator, ring modulator. Page 2. Page 3. Double-sideband suppressed-carrier transmission (DSB-SC) is transmission in which In the DSB-SC modulation, unlike in AM, the wave carrier is not transmitted; .. A DSBSC generation and demodulation instrument is described as side.

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The DSBSC generation using balanced modulator based on nonlinear resistance characteristics of diode is given below in Fig1. Views Read Edit View history. From Wikipedia, the free encyclopedia. Other MathWorks country sites are not optimized for visits from your location. Updated 20 Jan Select a Web Site Choose a web site to get translated content where available and see local events and offers.

Analog Communication DSBSC Modulators

Learn About Live Editor. This is apparent when the spectrum of the output signal is viewed.

It is used for radio data systems. Choose a web site to get translated content where available and see local events and offers. Retrieved from ” https: This is best shown graphically. By using this site, you agree to the Terms of Use and Privacy Policy.

The modulated output currents of the two diodes are combined in the center tapped primary of the output transformer, which then gets subtracted. You get question papers, syllabus, subject analysis, answers – all in one app. This consists of a message signal multiplied by a carrier signal.


Explain its generation using balanced modulator. Amplitude modulation AM is a modulation technique used in electronic communication. Double-sideband suppressed-carrier transmission DSB-SC is transmission in which frequencies produced by amplitude modulation AM are symmetrically spaced above and below the carrier frequency and the carrier level is reduced to the lowest practical level, ideally being completely suppressed.

This resultant signal is then passed through a low pass filter to produce a scaled version of original message signal. The modulating frequencies from the output is eliminated by the tuning of the output transformer, which results in the below equation of the generated DSBSC wave.

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The equation above shows that by multiplying the modulated signal by the carrier signal, the result is a scaled version of the original message signal plus a second term.

The above equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies. This page was last edited on 30 Decemberat The output of the balanced modulator contains two sidebands and sum of the harmonic components. In the picture shown below we see four peaks, the two peaks below Hz are the debsc sideband LSB and the two peaks above Hz are the upper sideband USBbut there is no peak at the Hz mark, wqves is the frequency of the suppressed carrier.

Below is a message signal that one may wish to modulate onto a carrier, wves of a couple of sinusoidal components with frequencies respectively Hz and Hz. Comments and Ratings 1. Full depth modulation requires generatin re-insertion.


Select the China site in Chinese or English for best site performance. Conventional AM wavse of the two sidebands and a carrier where the major transmitted power is concentrated in the carrier which contains no information. Based on your location, we recommend that you select: You are now following this Submission You will see updates in your activity feed You may receive emails, depending on your notification preferences.

Once this signal passes through a low pass filter, the higher frequency component is removed, leaving just the original message. Discover Live Editor Create scripts with code, output, and formatted text in a single executable document.

What is a DSBSC wave? Explain its generation using balanced modulator.

waevs The name “suppressed carrier” comes about because the carrier signal component is suppressed—it does not appear in the output signal. The diode in the balanced modulator use the nonlinear resistance property for producing modulated signals. The mathematical representation of this process is shown below, where the product-to-sum trigonometric identity is used.

DSB-SC transmission is a special case of double-sideband reduced carrier transmission. Engineering in your pocket Download our mobile app and study on-the-go. This file generates the amplitude modulated signal and DSBSC wave for given carrier wave frequency, message signal frequency and modulation Index.