The Tech Storror

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Modulation and Demodulation Modulation Audio or video waves received through transducers, known as signal webs, are difficult to transmit over long distances. High frequency carrier waves are used to transmit these signal waves over long distances as radio waves. The amplitude, frequency or phase of this carrier wave is changed according to the instantaneous value of the signal wave. Such changes are called modulation. In other words, mixing the signal with the carrier wave is called modulation. Modulation is mainly of two types, namely Amplitude Modulation (AM) and Frequency Modulation (FM). Use of Modulation: How far a real signal can be transmitted by a transmitter depends on two factors, namely -- (i) Transmitting Frequency (ii) Transmitter Power Modulation is used to send the signal farther. Different types of modulation methods: (1) Amplitude Modulation (AM) (ii) Frequency Modulation (FM) (iii) Pulse Modulation (PM) (iv) Frequency Shift Keying (FSK)  (v) Quadrature Amplitude ...

Wireless media: Wireless communication is a type of communication system that does not require any type of cable. In wireless communication, the sending device connects one computer to another computer or one device to another device through the radio web. Characteristics of Wireless Media: Wireless media do not use electrical or optical conductors or wires. In most cases, the Earth's atmosphere acts as the physical path for data transmission. Wireless systems are used when there are obstacles in the way of data transmission and installation of wired media is problematic. The three types of wireless media are -- (i) Radio Wave  (ii) Microwave   (ii) Infrared Radio wave: Network data is transmitted through radio transmission in the same way that signals are transmitted in radio. In this case every computer in the network can receive the signal sent by it. Radio wave frequencies are limited to 10 kHz to 1 GHz. The limited electromagnetic spectrum between 10 kilohertz and...

General features of printers General Features of Printer : Information stored in the computer's memory comes to the printer 8 through the input/output interface. The printer records incoming data permanently on paper. Hard copies of letters, numbers, symbols, images etc. are made with the help of printer. Printers with different features are manufactured by different companies. Following are some common features of the printer: (i) Print speed: Print speed (Print speed) means the speed of printing. That is, how fast, how much information can be printed out, this amount is used to measure. Print speed is expressed as DPI (Do Per Inch), PPM (Page Per Minute) etc. (ii) Print Quality: The print quality of the printer is called print quality. These print standards are based on four types of print. These are Draft Print, Letter Quality Print, Normal Print and Best Print. Generally, normal and best quality prints are available in laser printers. (iii) Buffer size: The amount of data that ...

Today we will know the story of the birth of internet. How this internet came about, who made it etc.   The Internet is a wide area computer network spanning the globe. It is an international network made up of numerous LAN, MAN, ONE network connections. The number of networks connected to the Internet is currently in the thousands and the number of connected computers is over ten billion, and these numbers are growing rapidly. The early activities of the Internet began with the ARPANET. In 1969, the United States Department of Defense conducted a research project It connects four universities of the country through an experimental computer network. The name of this network is ARPANET. Initially, the use of this network was open to research institutes and universities. Later it spread in almost all areas. The term Internet was coined in 1982 with the invention of the TCP/IP protocol used to connect different networks. After that the number of internet users increased rapidly. The p...

Fifth generation mobile internet is called 5G internet. This will ensure more use of radio waves. And more mobile phones will get internet service at the same place at the same time. 5G technology will enable modern cities, driverless cars or one machine to be connected to another machine. Keep reading to know about the advantages and disadvantages of 5G internet service: 1. It will be 10x-100x more than last 4G. Any movie download will take coin seconds. 2. While the 4G antenna scatters the wave in all directions, the 5G antenna only scatters the wave in the direction of the device. 3. FiveG is very quick to respond. That is very important for driverless cars. Because the cars have to communicate with each other very quickly. 4. The radio waves that will be used in 5G have never been used before. 5G's short wavelength has both advantages and disadvantages. It will be easily stuck if there is any kind of obstacle in front of its antenna area. As its waves cannot penetrate any build...

Difference Between Base Band and Broad Band Transmission Systems: Base Band: (1) In a baseband transmission system, the data sent from the computer is sent unaltered over the network connection. (2) Modulation is not required in baseband transmission systems. (3) In a baseband transmission system, multiple signals cannot be transmitted over a single pair of wires simultaneously. (4) Low cost in baseband transmission system. (5) Benefits are less available in baseband transmission systems. Broadband: (i) In broadband transmission system, the information received from the computer is modulated by high frequency and sent over the network connection. (ii) Amplitude modulation and demodulation are required in broadband transmission systems. (iii) In broadband transmission system it is possible to establish multiple connections simultaneously through one connection path (iv) Cost of broadband transmission system is high. (v) More benefits are available in broadband transmission systems. Repe...

Gateway: Gateway is a medium, which acts as a bridge or bridge between two networks so that many computers can exchange data together. That is, the device used to connect different types of networks is the gateway. It translates the protocol. It works on layer 7 of the OSI model. Switch: Network switch and network hub are the main pillars of computer networking. In networking, a switch is a device that performs filtering and packet forwarding when exchanging data packets between different parts of a local area network. The switch and SI layer operate at the data link layer. But sometimes it also works at network layer. A local area network (LAN) that uses switches to communicate between its different parts is called a switched LAN. Switches are the network layer that additionally processes data (Layer 3) and are often referred to above as Layer 3 switches. The first Ethernet switch was introduced in 1990. Functions of switches: Network switches are switches connected to most modern E...

Router: A router is a computer networking device that determines which way data will go through different networks. It is used to connect one network to another network and to route data packets from network to network. In this case the device is called a router. Routers break up broadcast domains in such a way that all devices under a network segment can read and process broadcasts sent for that network segment. A router connects two or more logical subnets. Its network hub does not perform any routing. Rather, it forwards every packet it receives on a network line to other network lines. Routers operate in two different planes: Control plane: Where the router selects the appropriate outgoing interface, which sends specific packets to specific destinations. Forwarding plane: which determines the forwarding of packets received by a logical interface. Initially routers were known as gateways. It was first conceived by the International Networking Group (INWG), an international computer...