Screen refresh rate A powerful video card. There must be a screen refresh rate has several refresh rates, rate is the number of times the scan screen in one second. If the refresh rate is low, it will cause the image on the screen. There is a flashing. Make the person using the computer. Symptoms of muscle fatigue occurs in the eyes and can cause hazard to the eyes. Current refresh rate is at 72 Hz if you use a large monitor refresh rate, the more you want. The refresh rate, the more the better Modem (Modems)Modems Act The digital signal converter (digital signals) from analogue signals (analog signals) to be sent on a phone line to send data and revert. The computer. The word modem (Modems) comes from the word (modulate/demodulate) mix refers to the process of converting digital information into analog format, and then convert the signal. Back to digital again when your modem is plugged into the modem the modem each difference category. Each type of modem have different features, as follows: 1.-speed signals. -Speed signal rate (rate) means that your modem can make the exchange of information with the other modem is bits/second (bps) or kilo bit/second (kbps) to indicate the speed of the modem so that it is easy to say and remember, often cutting off zeros, and then using the modem 56000 bps instead of letters, such as a modem 56 K in size are called. 2. the ability to compress data. The news sent information on the modem can make a compact with the method of compression (compression), you can send a large amount of information at a time, increasing the speed of your modem to pick up signals. 3. the ability to use it as a fax. Newer modem can send and receive a fax (the Fax capabilities), as well as transportation information. If you have the appropriate software, you can use a modem faek. Print (printer) If you print to the modem it's faek you go. To the destination fax machine.4. the ability to control errors The modem uses to control error (error control), many different ways to check to confirm that there will be no loss of any data. During the transfer of data from one computer to another. 5. designed for use both internal and external. The modem that is sold in the market in General will have 2 format is an external modem (external modems), and a built-in (internal modems) 6. use as a phone. Some modems have a regular phone into the circuit holders with the ability to transfer data and facsimile. Monitor screen Monitor screen is displayed with the name calling such as Monitor, CRT (Cathode Ray Tube) can be divided into multiple formats, such as a screen font (Text) with a graphical monitor (Graphic) by the screen font is the unit of measure is the number of characters per line, like 80 letters 25 lines for a graphical monitor is the unit of measure is the pixel (Pixel), such as 640 x 480 pixel. The external appearance of the screen, similar to a television themselves. What shows on the screen with text slides and animations by receiving data from the display adapter (Video Card, Video Adapter), which is an electronic circuit that is plugged on the motherboard functions from the data processing unit, a convert to the screen display. Today, the development of a wide variety of styles, designed by monitor on a number, color, contrast, resolution, save energy by using a monitor can be categorized in the following large groups.• Single color screen (Monochrome Monitor) The monitor signal from the control card of digital signal is 0 to 1 by electron beam scan to screen, a signal that it will glow point to bright spots? Where points level. The only time this color monitor is not popular. • Monitor many color (Color Monitor). Digital 4-channel monitor signals are signals of red, green, blue and brightness signals makes it possible to display up to 16 million colors 16 color color. • A flat screen (LCD Liquid Crystal Display;) Liquid crystal display with a portable computer categories mainly divide. 1. Active matrix screen, bright colors are visible from many angles, brightness and color, because, at a rate that high. Name is called Thin Film Transistor TFT says – and because the property. This type of screen prices high. 2. Passive matrix color monitor color is quite dry because there are colorful and bright. Cannot view from other views. In addition to the direct view Also called a Double Super Twisted Nematic that DSTN- The operation of the monitor. Starting from the stimulation device, image heat tube Born into an electron and an electron gun is fired. , To the point where you want to display on the monitor, the monitor will have a phosphorus coating glow. When these electrons to collide, it will cause the lighting, which compose the images in electron beam shows it firing to move diagonally and then when it comes to the most sweeping image edge. Beam rifle, it will stop shooting and adjust the electron gun down 1 line, and move to the other side and make the edges even more new. Look, it's a tooth saw shooting. The current flat-screen flow can overtake conventional screen shape, size issues, especially the remarkable space saving stacking, as well as the highlights of the flat-screen monitor is energy-by 17-inch size, 15-20-30 watts of power and is reduced to 5 Watts in Standby mode while the normal screen. 80-100 Watt power Keyboard the keyboard. As the basic requirements for admission to each computer. To get information from the press, and then make changes to the code to pass to a computer. The keyboard is used to enter data, or 50 or more keys. Most of the characters with a keypad number keys separately. To make entering numerical data easier and more comfortable to do so. Position the keyboard characters are based on the system type of the standard typewriter with a touch of thy keys (shift), to make it able to print both the English alphabet uppercase and lowercase letters, in which the English alphabet code system that is used in most computers will be 7 or 8 bits that is.
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