data transmitting technique in a format that utilizes continuous signals to transmit data including voice‚ image‚ video‚ electrons etc. An analog signal is a variable signal continuous in both time and amplitude which is generally carried by use of modulation. Analog circuits do not involve quantisation of information unlike the digital circuits and consequently have a primary disadvantage of random variation and signal degradation‚ particularly resulting in adding noise to
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Department of Electronic Engineering (Computer) Universiti Malaysia Sarawak‚ Malaysia Kuching‚ Sarawak‚ Malaysia Email : nor_ayu92@yahoo.com Abstract This paper presents about FM modulator and Abstractdemodulator.In electronic and telecommunication‚ modulation process of varying one or more properties of a high frequency periodic waveform ‚ called carrier signal with a modulating signal which typically contain information to be transmitted. The modulator and demodulator contain an optimized direct digital
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signal with 75 % Amplitude Modulation. Show several cycles of the modulated wave. Make the modulation frequency 1/10 of the carrier frequency. The unmodulated carrier has peak amplitude of 1.0V. In an amplitude modulation system‚ the message signal is given by Fig. and the carrier frequency is 1 KHz. The modulator output is SAM (t) = 2(b + 0.5m (t)) cos ωc t. 2. a. Determine the average message power. b. If b = 1‚ determine the modulation index and the modulation power efficiency. c. Sketch
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TELECOMMUNICATION A Gower telephone‚ at the Musée des Arts et Métiers in Paris Telecommunication is the transmission of messages‚ over significant distances‚ for the purpose of communication. In earlier times‚ telecommunications involved the use of visual signals‚ such as smoke‚ semaphore telegraphs‚ signal flags‚ and optical heliographs‚ or audio messages via coded drumbeats‚ lung-blown horns‚ or sent by loud whistles‚ for example. In the modern age of electricity and electronics‚ telecommunications
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______________________________________________________________________________ UNIT I AMPLITUDE MODULATION SYSTEMS PART-A (2 Marks) 1. Define Amplitude Modulation. 2. What is AM wave envelope? 3. Define modulation index for an AM wave. 4. List out the advantages of AM. 5. Define the transmission efficiency of AM signal 6. As related to AM‚ what is over modulation‚ under modulation and 100% modulation? 7. Define FDM . 8. Define SSB. 9. Mention the applications of SSB. 10. Mention the advantages
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Acropolis Technical Campus‚ Indore Department of Electronics and Communication Engineering Subject-Microwave lab Student Name: Enrollment No.: Sub. Code- EC 704 Experiment No.: 01 Date: Batch: Details of submissions & performance Performing Extra turn Regular turn First Submission Second submission Grade and Remarks by the Tutor 1. Clarity about the objective of the experiment 2. Clarity about the problem statement 3. Submitted the work in desired format 4. Shown capability to solve the
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power amplifiers‚ and channel media while transmission are also analyzed. The report presents different methods of generation of AM‚ carrier generating oscillators‚ frequency mixers‚ FM generation via VCOs and NBFM generation. Keywords— Analog modulation; Bandwidth; Chopper circuit; Crystal oscillator; Impedance matching; RF power amplifiers and filters; Telephone microphones Introduction A nalog transmission is still put into practice but holds its own drawbacks. Analog information signals in
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BALANCED RING MODULATOR Nur Amirah binti Kamaruzaman#1‚ Nurasmira Wanie binti Abd Wahab#2‚ Nurul Liana binti Mansor#3‚ Bachelor of Electronic Engineering and Computer Engineering (BENE) 1B021110140 2B021110237 3B021110216 Abstract— balanced ring modulator is a type of modulator that the diodes are arranged like a ring. In balanced ring modulator‚ there are also transformers and the carrier. This type of modulator is like bridge modulator. However‚ the arrangement of the diodes are different from
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guiding system‚ room monitoring (such as baby device)‚ small area security system and entertainments. No license is required for this low power- range limited transmitter designed according to FCC regulation. Frequency modulation has several advantages over the system of amplitude modulation (AM). The most important is that an FM has greater freedom from interference and static. Various electrical disturbances such as those caused by thunderstorms and car ignition systems. A well designed FM receiver is
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domain on the left‚ and the demodulation results in frequency and time domain on the right. The time length‚ number of analysis points‚ and resolution bandwidth have been changed from the default to make it easier to recognize the sinewave in the modulation. Note that the pre-demodulation time domain display is not baseband time (as you would see using an oscilloscope) but is instead IF time—the time domain signal you would see in the IF of a receiver. In this case‚ the receiver center frequency is
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