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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Based on your location, we recommend that you select: Discover Live Editor Create scripts with code, output, and formatted text in a single executable document. This consists of a message signal multiplied by a carrier signal. This is apparent when the spectrum of the output signal is viewed.
Analog Communication DSBSC Modulators
The DSBSC generation using balanced modulator based on nonlinear resistance characteristics of diode is given below in Fig1. This resultant signal is then passed through a low pass filter to produce a scaled version of original message signal.
In the picture shown below we see four peaks, the two peaks below Hz are the lower sideband LSB and the two peaks above Hz are the upper sideband USBbut there is no peak generatuon the Hz mark, which is the frequency of the suppressed carrier. The output of the balanced modulator contains two sidebands and sum of the harmonic components.
What is a DSBSC wave? Explain its generation using balanced modulator.
Double-sideband suppressed-carrier transmission DSB-SC is transmission in which frequencies produced by amplitude modulation AM are symmetrically spaced above and geneation the carrier frequency and the carrier level is reduced to the lowest practical level, ideally being completely suppressed.
Views Read Edit View history. The genertion equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies. DSB-SC is generated by a mixer. The mathematical representation of this process is shown below, where the product-to-sum wqves identity is used.
Choose a web site to get translated content where available and see local events and offers. From Wikipedia, the free encyclopedia. The diode in the balanced modulator use the nonlinear resistance property for producing modulated signals. Download our mobile app and study on-the-go.
It is used for radio data systems. This page was last edited on 30 Decemberat Comments and Ratings 1. The modulated output currents of the two diodes are combined in the center tapped primary of the output transformer, which then gets subtracted.
DSB-SC transmission is a special case of double-sideband reduced carrier transmission. Select a Web Site Choose a web site to get translated content where available and see local events and offers. Tags Add Tags amplitude modulation analog communication carrier wave communications message signal modulation modulation index. Retrieved from ” https: Demodulation is done by multiplying the DSB-SC signal with the carrier signal just like the modulation process.
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Other MathWorks country sites are not optimized for visits from your location. Full depth modulation requires carrier re-insertion. Updated 20 Jan This file generates the amplitude modulated signal and DSBSC wave for given carrier wave frequency, message signal frequency and modulation Index. Conventional AM consists of the two sidebands and a carrier where the major transmitted power is concentrated in the carrier which contains no information.
Engineering in your pocket Download our mobile app and study on-the-go. Explain its generation using balanced modulator. The equation geneation shows that by multiplying the modulated signal by the carrier signal, the result is a scaled version fsbsc the original message signal plus a second term.
Below is waes message signal that one may wish to modulate onto a carrier, consisting of a couple of sinusoidal components with frequencies respectively Hz and Hz. This is best shown graphically.
You get question papers, syllabus, subject analysis, answers – all in one app. Select the China site in Chinese or English for best site performance. Double Sideband Suppressed Carrier DSBSC is an amplitude modulation technique in which the modulated wave contains both the sidebands along with the suppressed carrier.
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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. Amplitude modulation AM is a modulation technique used in electronic communication.