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Saturday, 1 June 2019

Communication

The process of data transfer from one person to another person is called communication. All the living organisms in the earth communicate. If two persons are far away (they are not near with respect to each other), then the message from one person needs to be modulated and transmitted to the other person. For doing like this it requires one transmitting antenna and one receiving antenna. The message from one person will be encoded, modulated and transmitted to the other through a transmitting antenna. The receiving antenna will collects the transmitted signal and it decodes the encoded data. The way of communication can be either one sided (example T.V, radio etc) or two way communication (Mobile phones).

The communication may be either analog or digital communication.
Analog means we are transmitting the signal in the analog form.
Digital communication means we are transmitting the signal in the digital form.

Digital Transmission

Digital Transmission System Block Diagram
Types of Pulse Modulation
Digital Carrier Modulation Techniques
BPSK System with Block Diagram
ISDN - Principles, Objectives, Services, Architecture, Channels

Satellite Communication

Satellite Communication Overview

Audio and Video Systems

Audio and Video Systems
Nature of Sound
Properties of Sound
Frequency Response and Equalization
Microphones Types
Loud Speakers Types
Magnetic Recording and Reproduction of Sound
Need of DC and AC Biasing
Recording of CD (Compact Disc)
Hi - Fi and Stereo
Dolby System

Introduction to TV

TV Camera Tubes
Sequential and Interlaced Scanning
Calculation of Approximate Bandwidth in 625 Line Systems
TV Standard and Frequency Requirements
Blanking, Retrace, Synchronizing and Equalizing Pulses
Composite Video Signal
Positive and Negative Modulation
Monochrome TV Transmitter
Monochrome TV Receiver
Picture Tube



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