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.

Author: Zulkilmaran Vigis
Country: Costa Rica
Language: English (Spanish)
Genre: Automotive
Published (Last): 1 November 2008
Pages: 62
PDF File Size: 19.1 Mb
ePub File Size: 12.2 Mb
ISBN: 286-8-13533-383-9
Downloads: 10974
Price: Free* [*Free Regsitration Required]
Uploader: Taut

The mathematical representation of this process is shown below, where the product-to-sum trigonometric identity is used.

Once this signal passes through a low pass filter, the higher frequency component is removed, leaving just the original message. You get question papers, syllabus, subject analysis, answers – all in one app.

Analog Communication – DSBSC Modulators

Amplitude modulation AM is a modulation technique used in electronic communication. Conventional AM consists of the two sidebands and a carrier where the major transmitted power is concentrated in the carrier which contains no information.

This consists of a message signal multiplied by a carrier signal.

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.

From Wikipedia, the free encyclopedia.

Amplitude Modulation and DSBSC wave generation – File Exchange – MATLAB Central

Based on your location, we recommend that you select: Learn About Live Editor. The above equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies.


This is best shown graphically. Double Sideband Suppressed Carrier DSBSC is an amplitude modulation technique in which the modulated wave contains both the sidebands along with the suppressed carrier. This is apparent when the spectrum of the output signal is viewed. Discover Live Editor Create scripts with code, output, and formatted text in a single executable document.

In the picture shown below we see four peaks, the two peaks below Hz are the fo sideband LSB and the two peaks above Hz are the upper sideband USBbut there is no peak at the Hz mark, which is the frequency of the suppressed carrier. 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.

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. You are now following this Submission You will see updates in your activity feed You may receive emails, depending on your notification preferences. 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.


The name “suppressed carrier” comes about because the carrier signal component is suppressed—it does not appear in the output signal. Select the China site in Chinese or English for best site performance.

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

Engineering in your pocket Download our mobile app and study on-the-go. The diode in the balanced modulator use the nonlinear resistance property for producing modulated signals. DSB-SC transmission is a special case of double-sideband reduced carrier transmission. The DSBSC generation using balanced modulator based on nonlinear resistance characteristics of diode is given below in Fig1.

Demodulation is done by multiplying the DSB-SC genegation with the carrier signal just like the modulation process. Select a Web Site Choose a web site to get translated content where available and see local events and offers. Explain its generation using balanced modulator. saves

This page was last edited on 30 Decemberat Views Read Edit View history. Generatiom a web site to get translated content where available and see local events and offers. The output of the balanced modulator contains two sidebands and sum of the harmonic components. Updated 20 Jan