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The Class 12 Physics notes is a written explanation for every passage or concepts included in the chapter Communication Systems. These Communication Systems notes are available in the Portable Document Format. The PDF of the Class 12 Physics Notes can be easily downloaded without any difficulty. With the help of the downloaded revision notes ...
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Revision Notes. ass – 12 PhysicsChapter 15 - Commu. ication SystemIntroductionWe live in an information-rich world. It is necessary to convey information from one entity to another. Communication is the act of success. on, the term "successful" connotes a variety of things, includingThe sender and receive. have a common understanding on how ...
Jan 9, 2024 · Topic 1 Communication. 1. Communication Communication is the act of transmission and reception of information. 2. Communication System A system comprises of transmitter, communication channel and receiver. A block diagram of a generalised communication system is shown as below: 3. Transmitter It consists of transducer/signal generators ...
- Introduction
- Elements of A Communication System
- Recommended Books
- Basic Terminology of Communication Systems
- Bandwidth of Signals
- The Bandwidth of Transmission Medium
- Signals
- Propagation of Electromagnetic Waves
- Modulation and Its Necessity
- Types of Modulation
The act of transmission and reception of information is known as communication. Every living creature in the world experiences the need to impart or receive information almost continuously from others in the surrounding world. The aim of this chapter is to introduce the concepts of communication, namely the mode of communication, the need for modul...
Irrespective of its nature, every communication system has three essentialelements- transmitter, medium (also known as a channel), and receiver. In a communication system, the transmitter is located at one place, the receiver is located at some other place (far or near) separated from the transmitter and the channel is the physical medium that conn...
To understand the principles of communication, we must know some basic termswhich will be used frequently. 1. (i) Transducer: It is a device that converts one form of energy into another. In electronic communication systems, we usually come across devices that have either their inputs or outputs in the electrical form.An electrical transducer may b...
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies. It is typically measured in hertz(Hz). The message signal can be voice, music, picture, or computer data. In a communication system, each ofthese signals has different ranges of frequencies. The types of communication system needed for a given s...
Different types of transmission media offer different bandwidthssimilar to massage signals. The commonlyused transmission media are wire, free space and fiber optic cable. Coaxial cable is a widely used wiremedium, which offers a bandwidth of approximately 750 MHz. Broadly, transmission media have been divided into two types: Guided transmission me...
We may define a message signal as a single-valued function of time that conveys the information. Such afunction has a unique value at any instant in time. The message signals have to be converted into electricalsignals to make them suitable for transmission through the channel. The electrical signals are of two types: (i) Analog signals: An analog ...
An antenna at the transmitter in communication using radio waves radiates the electromagnetic waveswhich travel through space and reach the receiving antenna at the other end. Several factors affect the propagationof EM waves and the path, they follow. (i) Ground Wave: The antennas should have a size comparable to the wavelength λ of the signal (at...
Modulation is the phenomenon of superimposing the low audio frequency baseband message orinformation signals (called the modulating signals) on a high-frequency wave (called, the carrierwave). The resultant wave is called the modulated wave, which is transmitted. more
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The communication cycle consists of five elements as shown in the following diagram: 1. Sender. The sender is the individual who wishes to communicate a message. To send effective messages, it is important to have: A knowledge of the audience for that particular message. Failure to understand the audience will result in delivering messages that ...
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15.1 INTRODUCTION. Communication is the act of transmission of information. Every living creature in the world experiences the need to impart or receive information almost continuously with others in the surrounding world. For communication to be successful, it is essential that the sender and the receiver understand a common language.
