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In the chaotic churn of COVID, an election year, and the Black Lives Matter movement, more people than ever are buying books online from local and independent bookstores Requiring only basic algebra and trigonometry, the new edition is notable for its readability, learning features and numerous full-color photos and illustrations.
A systems approach is used to cover state-of-the-art communications technologies, to best reflect current industry practice. This edition contains greatly expanded and updated material on the Internet, cell phones, and wireless technologies.
Practical skills like testing and troubleshooting are integrated throughout. A brand-new Laboratory and Activities Manual provides both hands-on experiments and a variety of other activities, reflecting the variety of skills now needed by technicians. A new Online Learning Center web site is available, with a wealth of learning resources for students. Frenzel Author: Louis E. Receive an email when this ISBN is available used.
COM Terms.Format Available : PDF, ePub, Mobi Total Read : 46 Total Download : File Size : 48,5 Mb Description : Focused on fundamental concepts and practical applications, this book provides a strong foundation in the principles and terminology of computer networking and internet technology. This thoroughly revised second edition, incorporating some of the latest technical features in networking, is suitable for introductory one-semester courses for undergraduate students of computer science and engineering, electronics and telecommunication engineering, information technology, as well as students of computer applications BCA and MCA.
This text begins with an overview of computer networking and a discussion on data communication. Then it proceeds to explain how computer networks such as local area networks LANs and wide area networks WANs work, and how internetworking is implemented. This topic has been ade-quately dealt with in a separate chapter. The practical aspects of networking, listing the essential requirements needed for actually setting up a computer network, are thoroughly explained in the final chapter of the book.
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Skip to main content x Sign In. Requiring only basic algebra and trigonometry, this new edition is notable for its readability, learning features and numerous full-color photos and illustrations.Nojor bengali serial wiki
A systems approach is used to cover state-of-the-art communications technologies, to best reflect current industry practice. This edition contains greatly expanded and updated material on the Internet, cell phones, and wireless technologies. Practical skills like testing and troubleshooting are integrated throughout.
A new Online Learning Center is also available, with a wealth of learning resources for instructors and students.
McGraw-Hill's Connect, is also available as an optional, add on item. Connect is the only integrated learning system that empowers students by continuously adapting to deliver precisely what they need, when they need it, how they need it, so that class time is more effective. Connect allows the professor to assign homework, quizzes, and tests easily and automatically grades and records the scores of the student's work. Problems are randomized to prevent sharing of answers an may also have a "multi-step solution" which helps move the students' learning along if they experience difficulty.
Listing page for eBook Subscription Program. Your monthly rental cart is already full. Click continue to view and update your selected titles. Back Continue. Purchase un-bound 3-ring binder ready textbook Flexibility and ease of selecting chapters to take where you want to go What are my shipping options? Receive via shipping: Bound book containing the complete text Full color Hardcover or softcover What are my shipping options?Embed Size px x x x x Chapter 3 Amplitude Modulation Fundamentals.
Post on Dec views. Category: Documents 3 download. In amplitude modulation AM the information signal varies the amplitude of the carrier sine wave. The instantaneous value of the carrier amplitude changes in accordance with the amplitude and frequency variations of the modulating signal.Red dead redemption 2 unknown error ffff
An imaginary line called the envelope connects the positive and negative peaks of the carrier waveform. Slide 7 AM Concepts In AM, it is particularly important that the peak value of the modulating signal be less than the peak value of the carrier. A modulator is a circuit used to produce AM. Amplitude modulators compute the product of the carrier and modulating signals.
Slide 9 Modulation Index and Percentage of Modulation The modulation index m is a value that describes the relationship between the amplitude of the modulating signal and the amplitude of the carrier signal. Multiplying the modulation index by gives the percentage of modulation.
Slide 10 Modulation Index and Percentage of Modulation Overmodulation and Distortion The modulation index should be a number between 0 and 1. If the amplitude of the modulating voltage is higher than the carrier voltage, m will be greater than 1, causing distortion. If the distortion is great enough, the intelligence signal becomes unintelligible. Slide 11 Modulation Index and Percentage of Modulation Overmodulation and Distortion Distortion of voice transmissions produces garbled, harsh, or unnatural sounds in the speaker.
Distortion of video signals produces a scrambled and inaccurate picture on a TV screen. Slide 12 Modulation Index and Percentage of Modulation Figure Distortion of the envelope caused by overmodulation where the modulating signal amplitude V m is greater than the carrier signal V c. Slide 13 Modulation Index and Percentage of Modulation Percentage of Modulation The modulation index is commonly computed from measurements taken on the composite modulated waveform.
Slide 15 Sidebands and the Frequency Domain Side frequencies, or sidebands are generated as part of the modulation process and occur in the frequency spectrum directly above and below the carrier frequency. Slide 16 Sidebands and the Frequency Domain Sideband Calculations Single-frequency sine-wave modulation generates two sidebands.
Complex wave e. A plot of signal amplitude versus frequency is referred to as frequency-domain display.Figure The optical spectrum. One angstrom is equal to m. Figure Illustrating reflection and refraction at the interface of two optical materials. Figure Free-space optical communication system. Figure A simple light transmitter with series amplitude modulator.
Analog signals: transistor varies its conduction and acts as a variable resistance.
principles of electronic communication systems. chapter 3 amplitude modulation fundamentals
Figure Basic construction of a fiber-optic cable. Figure Typical layers in a fiber-optic cable. It varies smoothly and continuously over the diameter of the core. Figure A step index cable cross Figure Graded index cable section. Multimode step index 2. Single-mode step index 3. Multimode graded index.
Figure A multimode step index cable. Figure Single-mode step index cable. Figure A multimode graded index cable.
Note for Principles of Communication Systems - PCS By Sunil S Harakannanavar
Figure Optical transmitter circuit using an LED. Figure A typical laser driver circuit. Courtesy Vitesse Semiconductor Corp. It is a silicon PN-junction diode that is sensitive to light.
Figure Structure of a PIN photodiode. It can operate at rates to 3. Use newer types of cable that inherently have lower losses and fewer dispersion effects. Use regeneration. Use an optical amplifier the best option. Figure An erbium-doped fiber amplifier. Later, four channels of data were multiplexed. It can be used for both multiplexing and demultiplexing.All rights reserved. Chapter Figure Magnetic field around a current-carrying conductor. Figure Electric field across the plates of a capacitor.
Therefore, the magnetic fields combine. Figure a Magnetic and electric fields around a transmission line. Figure Converting a transmission line into an antenna. It is the radio wave with the composite electric and magnetic fields. Figure The dipole antenna. Figure The conical dipole and its variation. Figure Three-dimensional pattern of a half-wave dipole.
Figure Folded dipole. This antenna is called a Marconi or ground-plane antenna. Figure Ground-plane antenna. The antenna no longer resonates at the desired operating frequency, but at a higher frequency. Figure Using a base leading coil to increase effective antenna length.
Figure Radiation pattern of a highly directional antenna with gain. Parasitic arrays. Driven arrays. Figure A parasitic array known as a Yagi antenna. Figure Radiation pattern of a four-element collinear antenna. Figure A broadside array.Loncin generator 8000
Figure End-fire antennas. The spacing is also variable. Figure Log-periodic antenna. Figure A one-quarter wavelength matching stub or Q section. Figure A bifilar toroidal balun for impedance matching.Introduction to Radiation Protection
Figure An antenna tuner.After you enable Flash, refresh this page and the presentation should play. Get the plugin now. Toggle navigation. Help Preferences Sign up Log in. To view this presentation, you'll need to allow Flash. Click to allow Flash After you enable Flash, refresh this page and the presentation should play.
View by Category Toggle navigation. Products Sold on our sister site CrystalGraphics. Description: Chapter 1 : Introduction to Electronic Communications System Main purpose of an electronic communications system is to transfer information from one place to another.
Tags: alexander bell chapter communications electronic graham introduction system. Latest Highest Rated. Title: Chapter 1 : Introduction to Electronic Communications System 1 Chapter 1 Introduction to Electronic Communications System Main purpose of an electronic communications system is to transfer information from one place to another.
In this chapter, we will cover Communication models Communication transmission modes Power measurement in electronics communication Electromagnetic frequency spectrum Communication bandwidth Information capacity 2 1. Generally, the mode of communication can be divided into 3 types Simplex System the system capable of sending information in one direction only where only the sender can send the information and only the recipient can receive the information. TV radio broadcasting Half-duplex System the system capable to carry information in both direction, but only one direction is allowed at a time.
The sender transmits to the intended receiver, and then reverse their roles. The 2 directions of information travel are independent of each other.
Ex 2 Convert a power gain Ap 30 dB to an absolute power ratio. With dBm, the reference level is 1 mW miliwatts. Bel unit compressed absolute ratios of 0.
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