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.
|Published (Last):||28 March 2012|
|PDF File Size:||20.37 Mb|
|ePub File Size:||3.92 Mb|
|Price:||Free* [*Free Regsitration Required]|
Double-sideband suppressed-carrier transmission – Wikipedia
Double Sideband Suppressed Carrier DSBSC is an amplitude modulation technique in which the modulated wave contains both the sidebands along with the suppressed carrier. The above equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies. Updated 20 Jan The DSBSC generation using balanced modulator based on nonlinear resistance characteristics of diode is given below in Fig1. This file generates the amplitude modulated signal and DSBSC wave for given carrier wave frequency, message signal frequency and modulation Index.
Below is a message signal that one may wish to modulate onto a carrier, consisting of a couple of sinusoidal components with frequencies respectively Hz and Hz.
Tags Add Tags amplitude modulation analog communication carrier wave communications message signal modulation modulation index. Full depth modulation requires carrier re-insertion. The modulated output currents of the two diodes are combined in the center tapped primary of the output transformer, which then gets subtracted.
This is apparent when the spectrum of the output dsbac is viewed. Amplitude modulation AM is a modulation technique used in electronic communication. DSB-SC transmission is a special case of double-sideband reduced carrier transmission. Download our mobile app and study on-the-go. DSB-SC is generated by a mixer.
Select a Web Site
You are now following this Submission You will see updates in your activity feed Gwneration may receive emails, depending on your notification preferences. 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.
Discover Live Editor Create scripts with code, output, and formatted text in a single executable document. Select the China site in Chinese or English for best site performance. Retrieved from ” https: The diode in the balanced modulator use the nonlinear resistance property for producing modulated signals.
What is a DSBSC wave? Explain its generation using balanced modulator.
Select a Web Site Choose a web site to get translated content where available and see local events and offers. The modulating frequencies from the output is eliminated by the tuning of the output transformer, which results in the below fsbsc of the generated DSBSC wave.
Explain its generation using balanced modulator. Choose a web site to get translated content where available and see local events and offers.
This is best shown graphically. It is used for radio data systems. 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 at the Hz mark, which is the frequency of the suppressed carrier.
The mathematical representation of this process is shown below, where the product-to-sum trigonometric identity is used. This consists of a message signal multiplied by a carrier signal. This resultant signal is then passed through a low pass filter to produce a scaled version of original message signal. The equation above shows that by multiplying the modulated signal by the carrier signal, the geneeation is a scaled version of the original message signal plus a second term.
Learn About Live Editor.
Comments and Waces 1. The output of the balanced modulator contains two sidebands and sum of the harmonic components. Other MathWorks country sites are not optimized for visits from your location.
Engineering in your pocket Download our mobile app and study on-the-go. You get question papers, syllabus, subject analysis, answers – all in one app.
Analog Communication – DSBSC Modulators
This page was last edited on 30 Decemberat Once this signal passes through a low pass filter, the higher frequency component is removed, leaving just the original message. Views Read Edit View history. Based on your location, we recommend that you select: Demodulation is done by multiplying the DSB-SC signal with the carrier signal just like the modulation process. The name “suppressed carrier” comes about because the carrier signal component is suppressed—it does not appear in the output signal.