Experiments Manual for Principles of Electronic Communication Systems 5th EditionКНИГИ » АППАРАТУРА
Название: Experiments Manual for Principles of Electronic Communication Systems, 5th Edition Автор: Louis E. Frenzel Jr. Издательство: McGraw Hill Год: 2023 Страниц: 271 Язык: английский Формат: pdf, epub, mobi Размер: 10.1 MB
This manual is to accompany the textbook Principles of Electronic Communications Systems (PECS), fifth edition. That text was written to support a one- or two-semester course in the fundamentals of communications systems including wireless and networking, both analog and digital. The text is written at the technology level and provides coverage for both 2-year community college and technical school programs through 4-year bachelor of technology programs. This manual serves as a supplement to the text and provides practical student activities as well as laboratory experiments, given the appropriate equipment.
There are always limits as to the extent of coverage of any textbook. Given practical page limits in addition to the time constraints of any college course, a text can cover only so much. The scope and breadth of coverage has been balanced with depth of coverage. However, this manual serves the instructor and the student in providing not only validation of principles in the text but also the opportunity to dig deeper on a variety of subjects with both Internet access and hands-on lab experiments.
Lab experiments are projects using actual electronic and/or computer hardware to demonstrate and validate key theoretical concepts. The goal is to provide a minimum of true hands-on practice with real test equipment, components, and related hardware. Most colleges have adequate lab equipment for teaching basic electronics as well as digital circuits and microcomputers. However, few have suitable lab equipment for teaching communications hardware. It is typically more expensive than basic instruments and trainers and can certainly be more difficult to use. Working with RF circuits and equipment is particularly challenging.
For these reasons, the lab experiments in the manual have been simplified as much as possible without compromising the teaching of the fundamentals. Furthermore, low cost was a key consideration in choosing the lab experiments. One way to do this is to use circuits that operate at much lower frequencies. Instead of VHF, UHF, and microwave signals that are the most common today, this manual uses low RF and in many cases audio and midrange frequencies below 1 MHz. This makes the circuits less expensive, less critical, and more adaptable to traditional breadboards. An effort has been made to use the older DIP ICs rather than the more common surface-mount devices so common in wireless and communications gear today. Finally, by using the lower frequencies, commonly available test equipment is typically acceptable.
Most communications receivers, regardless of size or application, are superheterodyne types. In addition, most of the gain and virtually all of the selectivity of the receiver is obtained in the IF section. The gain is easily obtained with transistor or IC amplifiers. The selectivity is more difficult as the IF passband must be carefully selected to match the signals being received and must, in most cases, have very steep skirt selectivity. In older receivers, selectivity was obtained with cascaded tuned transformers whose coupling was adjusted to give the desired bandwidth and steepness of response. These IF transformers were difficult to tune and adjust. Today, most IF selectivity is obtained with crystal filters or ceramic resonators. Some designs even use DSP filters. At very high frequencies, SAW filters are used. These filters are fixed during their manufacture to furnish a desired frequency response. Very steep selectivity is readily obtained in a very small package at low cost, and no tuning or adjustment is required.
Contents: Introduction Introduction to Electronic Communication Electronic Fundamentals for Communications Amplitude Modulation Fundamentals Amplitude Modulation and Demodulation Circuits Fundamentals of Frequency Modulation FM Circuits Radio Transmitters Communication Receivers Digital Data Transmission Multiplexing, Duplexing, and Multiple Access Transmission Lines Fundamentals of Networking, Local Area Networks, and Ethernet Antennas and Wave Propagation Internet Technologies Microwave and Millimeter-Wave Communication Satellite Communication Optical Communication Cell Phone Technologies Wireless Technologies Communication Tests and Measurements Appendix A Breadboarding Appendix B GROL Review/Final Exam
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Digital Systems: Principles and Applications Название: Digital Systems: Principles and Applications Автор: Widmer N.S., Moss G.I., Tocci R.J. Издательство: Pearson, New York Год: 2016 Формат:...
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Experiments Manual for Principles of Electronic Communication Systems 5th Edition 
Название: Experiments Manual for Principles of Electronic Communication Systems, 5th Edition
