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):||1 July 2012|
|PDF File Size:||14.58 Mb|
|ePub File Size:||10.83 Mb|
|Price:||Free* [*Free Regsitration Required]|
Select the China site pf Chinese or English for best site performance. Views Read Edit View history. This is apparent when the spectrum of the output signal is viewed. This consists of a message signal multiplied by a carrier signal. The diode in the balanced modulator use the nonlinear resistance property for producing modulated signals. Other MathWorks country sites are not optimized for visits from your location.
Download our mobile app and study on-the-go. Engineering in your pocket Download our mobile app and study on-the-go.
Updated 20 Jan The output of the balanced modulator contains two sidebands and sum of the harmonic components. The name “suppressed carrier” comes about because the carrier signal component is suppressed—it does not appear in the output signal. The modulated output currents of the two diodes are combined in the center tapped primary of the output transformer, which then gets subtracted.
Once this signal passes through a low pass filter, the higher frequency component is removed, leaving just the original message.
Choose a web site to get translated content where available and see local events and offers. 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. Explain its generation using balanced modulator. Amplitude modulation AM is a modulation technique used in electronic communication.
Analog Communication – DSBSC Modulators
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.
From Wikipedia, the free encyclopedia. It is used for radio data systems. Discover Live Editor Create scripts with code, output, and formatted text in a single executable document. Select a Web Site Choose a web site to get translated content generatin available and see local events and offers.
DSB-SC transmission is a special case of double-sideband reduced carrier transmission. Full depth modulation requires carrier re-insertion.
Analog Communication DSBSC Modulators
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 mathematical representation of this process is shown below, where the product-to-sum geneeation identity is used.
Comments and Ratings 1.
Retrieved from ” https: 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.
Double Sideband Suppressed Carrier DSBSC is an amplitude modulation technique in which the modulated wave contains both the sidebands along with the suppressed carrier. Based on your location, we recommend that you select: The above equation shows that carrier has been cancelled outleaving only two sidebands and the modulating frequencies.
Demodulation is done by multiplying the DSB-SC signal with the carrier signal just like the modulation process. This resultant signal is then passed through a low pass filter to produce a scaled version of original message signal. Tags Add Tags amplitude modulation analog communication carrier wave communications message signal modulation 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. Learn About Live Editor.