The Tech Storror

  Analog and Digital Transmission Analog Signal: The system in which variable signal i.e. the signal can have any meaning at any time, is called analog signal. This signal is used for data processing in analog devices like radio, TV etc. The wave/shape of an analog signal is-- Digital Signal: The level of the signal is variable, i.e. the level of the signal changes over time in a certain step, it is called a digital signal. This signal is used for data processing in digital devices like computers, digital clocks etc. The wave/shape of a digital signal is-- Carrier Signal: Carrier signal is a type of high frequency signal, which is used as a carrier wave to transmit electrical signals to distant places. - The wave/shape of carrier signal is the difference between analog, digital and carrier signal: The difference between analog, digital and carrier signal is given below-- Analog signal (i) A system in which the signal is variable i.e. the signal can have any value at any time, is ca...

How to maintain and use disks There are basically three types of disks used in computers, namely: (i) Floppy Disk, (ii) Hard Disk, (iii) Compact disk or CD. Of these, the first two discs work on the principle of magnetic and the third optical technology. At present there is not much use of floppy disk. However, magnetic hard disk and optical CD or DVD are two essential means of data storage in computer systems. Disk drives are used to store and read data on these disks. Disk Drive Maintenance: Dust or dirt can damage this drive and data can be lost if the disk enters a dusty drive. In addition, due to the formation of dust layer or oxide layer, the rotation of the drive head is hindered. For these reasons, disk drives must be cleaned regularly. Disadvantages for disks and disk drives are: (i) High temperature (ii) Cold flow (iii) Electro-magnetic field (iv) Dust (v) Ash or fibrous matter.  (vi) Stress The following steps can be taken to protect disks and disk drives from various m...

Malicious computer drivers Describe the malicious computer controllers: Various effects and causes work for computer damage. Some of these effects are natural, some are artificial and some are due to user inefficiency and carelessness. Besides, some negative actions intended by other users can damage the computer. Computer malware controllers can be broadly divided into four categories: (a) Physical damage controls (b) Malfunctioning controllers due to electrical problems (c) Software Malicious Controls (d) Improper Handling of Users. (a) Physical Harmful Controllers: Those harmful controllers that occur due to external conditions and environmental factors causing damage to the computer are called Physical Harmful Controllers. called physical damage control. The names of such controllers are: (i) Dust (ii) Smoke (iii) High Temperature (iv) Very Low Temperature (v) Magnetic Fields (vi) Liquid & Humidity (vii) Corrosion to Parts (viii) Noise or Interference. (b) Faulty currents due t...

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 ...