Explanation: The RF amplifiers have greater gain that is they have better sensitivity. In an Amplitude Modulated (AM) wave with 100% modulation (ma), the carrier is suppressed. 60) In High level Amplitude Modulation. Amplitude Modulation - Electronic Engineering (MCQ) questions & answers Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Amplitude Modulation 1) What is the carrier frequency in an AM wave when its highest frequency component … After successful attempts, the modulation technique was established and used in electronic communication. Modulation and Demodulation Objective Type Questions and Answers for competitive exams. If a carrier of 100% modulated AM is suppressed before transmission, the power saving is nearlyeval(ez_write_tag([[300,250],'electricalvoice_com-medrectangle-4','ezslot_10',143,'0','0'])); 5. In crosstalk, the signals traveling closer to each other interfere with each other and cause disturbance in the signal. For an AM signal at 55.25 MHz with 0.5 MHz video modulation, the total bandwidth needed is: (A) 1 MHz (B) 2 MHz (C) 0.75 MHz (D) 0.55 MHz. _____ is the maximum sideband suppression value using filter system. The output of the mixer is used to detect the modulating or information signal from the received modulated carrier. ANSWER: Multiplication of incoming signal and the locally generated carrier. The ratio of the total power in the new modulated signal to that of the original signal will nearly beeval(ez_write_tag([[728,90],'electricalvoice_com-box-3','ezslot_11',141,'0','0'])); 2. a) High frequency b) Low frequency c) High amplitude d) Low... 2. This test is Rated positive by 93% students preparing for Electronics and Communication Engineering (ECE).This MCQ test is related to Electronics and Communication Engineering (ECE) syllabus, prepared by Electronics and Communication Engineering … A directory of Objective Type Questions covering all the Computer Science subjects. It is the undesirable frequency generated at the receiver which also gets amplified with the message signal. Modulation is used toeval(ez_write_tag([[250,250],'electricalvoice_com-medrectangle-3','ezslot_12',142,'0','0']));eval(ez_write_tag([[250,250],'electricalvoice_com-medrectangle-3','ezslot_13',142,'0','1'])); .medrectangle-3-multi-142{border:none !important;display:block !important;float:none;line-height:0px;margin-bottom:15px !important;margin-left:0px !important;margin-right:0px !important;margin-top:15px !important;min-height:250px;min-width:250px;text-align:center !important;}, Which of the above statements are correct. Explanation: Pulse amplitude modulation is a type of analog pulse modulation system. 38. ANSWER: Amplitude of the pulse train is varied. Amplitude Modulation MCQs For Engineers. eval(ez_write_tag([[250,250],'electricalvoice_com-box-4','ezslot_14',130,'0','0']));6. In general, amplitude modulation definition is given as a type of modulation where the amplitude of the car… These quiz objective questions and answers for examinations based on frequency-shift-keying, amplitude-shift-keying, codec etc. Digital transmission also needs synchronization in certain applications which is not needed in case of analog communication systems. Pulse Position Modulation (PPM) is an analog modulation scheme in which, the amplitude and the width of the pulses are kept constant, while the position of each pulse, with reference to the position of a reference pulse varies according to the instantaneous sampled value of the message signal. c. 2. Carrier signal in modulation technique is _____ signal. This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Analog to Analog Modulation Techniques- Amplitude Modulation (AM)- Frequency Modulation (FM)- Phase Modulation (PM) ”. The peak voltage of the signal is, 15. This contains 10 Multiple Choice Questions for Electronics and Communication Engineering (ECE) Test: Amplitude Modulation (mcq) to study with solutions a complete question bank. This technique was devised in the 20th century at a time when Landell de Moura and Reginald Fessenden were conducting experiments using a radiotelephone in the 1900s. Explanation: Cross talk is the disturbance caused in the nearby channel or circuit due to transmitted signal. In double sideband suppressed carrier modulation, the modulated wave undergoes phase reversal, whenever. ANSWER: The disturbance caused in the nearby channel or circuit due to transmitted signal. They have better ability to amplify weak signals received by the receiver. The produced frequencies are either the sum or the differences of the frequencies of the received signals. Phase modulation and Frequency modulation… Multiplexing | It’s 2 important… Pulse Amplitude Modulation (PAM) |… Pulse Code Modulation (PCM) |… 30+ important MCQ on Encoding… Sampling Theorem and Encoding in… Line Coding | Manchester encoding… Equalization and eye pattern in… Digital Modulation Techniques | 5+… These short objective type questions with answers are very important for competitive exams. 50 dB . Mcq Amplitude And Frequency Modulation Pdfslibforme 1/52 Downloaded from holychild.org on March 5, 2021 by guest [DOC] Mcq Amplitude And Frequency Modulation Pdfslibforme Thank you very much for reading mcq amplitude and frequency modulation pdfslibforme. What is QAM (Quadrature Amplitude Modulation)? Consider the following features of FM vis-a-vis AM: The radiation power at 85% of modulation iseval(ez_write_tag([[300,250],'electricalvoice_com-banner-1','ezslot_15',144,'0','0'])); 10. The ratio of the total power in the new modulated signal to that of the original signal will nearly be. Data Communication & Computer Networking Multiple Choice Questions and Answers or MCQs for Interview from chapter Data Modulation. they have improved gain to the signal- They have better signal to noise ration than other amplifiers- The selectivity is better as they have better rejection to the adjacent undesired signals. be over-modulated; have the resultant modulation limited to 1.0; have the resultant modulation index around 0.82; have the resultant modulation index around 0.95 A specific Amplitude Modulated broadcasting ratio transmitter radiates 10 Kilo-Watt and the depth of modulation is 60%, the carrier power prerequisite is 9 KW 7.8 KW The process of using a pulse signal to represent information is called _____ a) Pulse modulation b) Frequency modulation c) Amplitude modulation d) Phase modulation. What is the assigned bandwidth of each of the channels in the AM broadcast band? January 18, 2021 December 18, 2020 by prince70386. A 1000 W carrier is amplitude-modulated and has a side-band power of 300 W. The depth of modulation is, 12. Cross talk is usually caused by undesired coupling of capacitors or inductors from one channel to another. The modulating index of an AM-signal is reduced from 0.8 to 0.5. A. It includes objective questions on the different encoding techniques are available in the modulation process, different characteristics of a carrier signal, types of modulation , and the different types of spreading techniques. Explanation: The function of a frequency mixer in a super heterodyne receiver is that it mixes or multiplies the incoming modulated carrier with the locally generated carrier. Modulation and Demodulation MCQ Test & Online Quiz: Below is the Modulation and Demodulation MCQ test that checks your basic knowledge of Modulation and Demodulation. 2. All Rights Reserved. DOMOV; NAJEM GUMENJAKA; LAST MINUTE; DESTINACIJE; POGOJI NAJEMA; CENIK; KONTAKT Pulse Code Modulation - MCQs with answers Q1. A carrier wave of frequency 2.5 GHz amplitude is modulated with two modulating frequencies equal to 1 kHz and 2 kHz. So the transmission bandwidth is also increased. The advantages of using RF receivers are - They have better sensitivity i.e. B. Amplitude modulation or just AM is one of the earliest modulation methods that is used in transmitting information over the radio. A broadcast AM transmitter radiates 50 kW of carrier power. 1. Modulation index of an AM signal is ratio of __________ to the _______ a) Peak carrier amplitude, Peak message signal... 3. Explanation: Standard intermediate frequency used for AM receiver is 455KHz. In pulse modulation systems, the carrier is a train of pulses rather than a continuous signal. Practice these MCQ questions and answers for preparation of various competitive and entrance exams. Explanation: The image frequency is defined as the signal frequency added to twice the value of intermediate frequency. As you may know, people have look hundreds times for their chosen books like Electromagnetic interference (EMI) causes cross talk in the circuits or the channels. Multiplexing scheme which uses carrier phase shifting and synchronous detection to permit two DSB signals to occupy the same frequency band is called, 8. Communication System | Matching Type Questions, Smoke detector vs Carbon monoxide detector, Ensure that intelligence may be transmitted over a long distance, neither amplitude nor frequency modulation, lower than the signal frequency by 455 Hz, higher than the signal frequency by 455 kHz. The percentage of power-saving will be, 13. MCQ Topic Outline included in ECE Board Exam Syllabi MCQ in Amplitude Modulation MCQ in Phase Modulation MCQ in Sound Pressure Level MCQ in Frequency Modulation MCQ in Pulse Modulation Continue Practice Exam Test Questions Part 14 of the Series 651. The output is the IF which is a fixed frequency from which original information is detected using filters and amplifiers. Consider the following types of modulation: Which of the above modulation are used for telecasting TV programs? Carrier signal in modulation technique is _______ signal. QAM (Quadrature Amplitude Modulation) is defined as the modulation technique which is the combination of phase and amplitude modulation of a carrier wave into a single channel. The locally generated carrier applied to the two inputs is however in phase quadrature with each other. This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Amplitude Modulation”. In TV, video signals are transmitted through, 7. The modulation factor is, 11. a. In a typical AM receiver circuit, the oscillator frequency is. 0.39; 0.63; 0.85; 1.25; Answer. 30. If two signals modulate the same carrier with different modulation depths of 0.3 and 0.9, the resulting modulation signal will. In other words, QAM transmits information by changing both the amplitude and phase of a carrier wave, thereby doubling the effective bandwidth. 18. PAM (Pulse amplitude modulation) is a process whereby: (A) The height of a pulse is made proportional to the sampled value (B) The position of the pulse is changed as a function of the sampled value (C) The width of the pulse is varied as a function of time (D) None of the above. MCQ Topic Outline included in ECE Board Exam Syllabi. 20. 4. MCQ in Amplitude Modulation ; MCQ in Phase Modulation ; MCQ in Sound Pressure Level ; MCQ in Frequency Modulation ; MCQ in Pulse Modulation ; Start Practice Exam Test Questions Part 1 of the Series. Mar 05,2021 - Amplitude Modulation | 10 Questions MCQ Test has questions of Electronics and Communication Engineering (ECE) preparation. A 100 V carrier peak changes from 160 V to 40 V by a modulating signal. MCQ in Amplitude Modulation - Free download as PDF File (.pdf), Text File (.txt) or read online for free. For which one of the following modulated signals, the original message, up to a scaling factor can be recovered using envelope detection? 61) Square law modulators. 1. 1. RF carrier 10 kV at 1 MHz is amplitude modulated and modulation index is 0.6. Amplitude Modulation MCQ. The modulated wave will have the total bandwidth, 14. The frequencies of the local carriers are adjusted as same as the carrier frequency of the received signal. 37. Multiple Choice AM Intermediate frequency (IF) is obtained by mixing the incoming signal frequency with the locally generated signal frequency. In PCM, the parameter varied in accordance with the amplitude of the modulating signal is a) Amplitude b) Frequency c) Phase d) None of the above View Answer / Hide Answer. 250+ TOP MCQs on Amplitude Modulation and Answers 1. ONLINE Multiple Choice Questions – Electric Machine Design PART 1 Power Electronics Special MCQ Part Two MAHATRANSCO Exam Pattern & Syllabus(Electrical ,Civil,Electronics & Telecommunication) Engineering 2017 1. a. Modulation is done at high power of carrier and modulating signal b. Collector modulation method is High level Amplitude Modulation c. Power amplifiers are used to boost the carrier and modulating signals before modulation d. All of the above. The modulating index of an AM-signal is reduced from 0.8 to 0.5. Mar 03,2021 - Amplitude Modulation - MCQ Test | 20 Questions MCQ Test has questions of Electronics and Communication Engineering (ECE) preparation. Multiple choice questions on Digital Communication topic Signal Formatting and Baseband Modulation. a) Amplitude limiter b) Demodulator c) AM amplifier d) Mixer Answer: a Explanation: Amplitude Limiter circuit is used in FM receiver to remove the noise or any variation in amplitude present in the received signal. Electronic Engineering (MCQ) questions & answers. Answer. Consider the following features of FM vis-a-vis AM: Which of the above are advantages of FM over AM? Explanation: Costas receiver is a synchronous receiver system used for demodulating DSB-SC waves. Avionics Multiple Choice Questions on “Pulse Modulation”. 9. The modulation techniques used to convert analog signal into digital signal are a) Pulse code ... Q3. This is the Multiple Choice Questions in Chapter 3: Amplitude Modulation from the book Electronic Communication Systems by Roy Blake. This Modulation and Demodulation MCQ Test contains 20 Multiple Choice Questions. MCQs: Modulation & Demodulation Mcqs - Mcqs Clouds is a portal which provide MCQ Questions for all competitive examination such as GK mcq question, competitive english mcq question, arithmetic aptitude mcq question, Data Intpretation, C and Java programing, Reasoning aptitude questions and answers with easy explanations. © Copyright 2016. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. 3. You have to select the right answer to the question. 1. ANSWER: (d) All of the above. 1. The image frequency causes interference and therefore two or more stations or sources may be received simultaneously at the receiver output. These short solved questions or quizzes are provided by Gkseries. The solved questions answers in this Test: Amplitude Modulation quiz give you … Najem Gumenjaka | Izposoja Gumenjaka. a) High frequency b) Low frequency c) High amplitude d) Low amplitude View Answer Communication Systems: MCQ on Amplitude modulation Here are some questions (on amplitude modulation) of the type you are most likely to encounter in your entrance exam: (1) A carrier wave of peak value 16 V is used to transmit a note of frequency 1000 Hz. In this section of Data Communication and Networking - Analog Transmission MCQ (Multiple Choice) Based Questions and Answers,it cover the below lists of topic, All the Multiple Choice Question and Answer (MCQs) have been compiled from the books of Data Communication and Networking by The well known author behrouz forouzan. The incoming weak signals are raised to a higher level by the RF amplifiers and therefore they improve signal to noise ratio. 19. The incoming modulated carrier is applied at two inputs of the coherent detectors of the receiver. Explanation: Upper frequency = 850HzBandwidth = 50HzTherefore lower Frequency = 850 - 50= 800 HzCarrier Frequency = (850-800)/2 = 825 Hz. It then produces a number of frequencies. The RF amplifiers have better selectivity i.e., better ability to select the wanted signals among the various incoming signals. Finally, you can also take the Online Quiz from the Take Modulation and Demodulation … Izberite gumenjak po svojem okusu in ga rezervirajte. Generally the RF section of a radio transmitter consists of: He developed the first successful FM radio system a. B.E.Alpine b. N.S. This set of MCQ questions on encoding and modulation includes the collections of the top 20 multiple-choice questions on encoding and modulation in wireless communication. Explanation: Modulation Index = 0.8Pc = 124WPower in sidebands may be calculated as = m2 Pc/4 = (0.8)2 * 124/4= 79.36 W. Explanation: Due to analog to digital conversion, the data rate becomes high in digital communication. If you are looking for a reviewer in Communications Engineering this will definitely help. Which one of the following modulation techniques has got maximum SNR? Explanation: The RF amplifiers are used in super heterodyne receivers. Thus, the output of the amplitude limiter has a constant amplitude. Bandwidth occupied by 100 MHz carrier, AM modulated by the signal frequency of 10 kHz is, 16. Multiple Choice Questions and Answers on Modulation and Demodulation In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Question Bank in Electronics & Communication Engineering by Prem R Chadha
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