Introduction of Flat Panel Monitors
These are two basic type of monitor that are used with personal computer, CRT Monitor and Flat-Panel Monitor. Flat Panel is a relatively new technology when compared to the CRT or standard monitor technology. Due to new technology some important considerations to look at when purchasing a flat panel Monitor.
Technology of LCD
There are two categories of LCDs then Before looking at what type of configurations you need to look for when purchasing a computer Flat Panel it is important to know if you want Active Matrix LCD or Passive Matrix LCD.
Active Matrix LCD : Active Matrix LCD uses a transistor for each liquid crystal cell or pixel and thus displays high quality images. Active Matrix LCD is also known Thin Film Transistor(TFT) display. Today, new generation of TFT is called organic LED that displays brighter images than standard TFT display. The organic LED uses organic molecules to generate output on the screen.
Passive Matrix LCD : Passive Matrix LCD uses fewer transistors and requires less power than active matrix LCD. The colors on Passive Matrix LCD are not bright as compared to active matrix LCD.
Resolution
The quality of LCD screen depends on its resolution, which is generally proportional to the size of screen.
15" flat panel monitor typically has a resolution of 800 x 600 / 1,024 x 768
17" flat panel monitor typically has a resolution of 1,280 x 1,024
19" flat panel monitor typically has a resolution of 1,280 x 1024
21" flat panel monitor typically has a resolution of 1,600 x 1,200.
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Sunday, July 5, 2009
Fiber Optic Cable
A fiber optic cable consists of tubes of glass or plastic fiber which transmit digital data over longer distances and at higher data rates than other forms of wired and wireless communications. A typical optical fiber consists of a very narrow strand or fiber of glass called the core. This core is surrounded by a concentric layer of the glass called cladding. The diameter of a core is 62.5 microns and the diameter of cladding is about 125 microns. The cladding is coated with insulating material such as plastic jacket.
In twisted-pair cable and coaxial cable, data is transmitted in the form of electric frequencies. So copper wire has to be protected from water and electromagnetic waves. In fiber optic cable, these types of problems are not occurred.
The data transmission speed is very high because fiber-optic cable uses light to transmit data. The data transmission speed is up to billions bits per second. An important characteristic of fiber optic is refraction. Refraction is the characteristic of a material to either pass or reflect light. When light passes through a medium, it bends as it passes from one medium to the other.
The advantages of fiber optic cable are:
Its transmission capacity is about 26,000 times greater than twisted pair media - up into the gigabits and more reliable (lower data transmission errors).
It has high level of security and much thinner and lighter than other metal wires.
Fiber optic not affected by electromagnetic noise for example radios, motors and others cables.
The disadvantage of fiber optic is that the cables are very costly and difficult to install.
Therefore the fiber-optic cable is becoming more popular and replacing all old cable system. Today telephone, banks, and television companies are replacing their existing telephone and coaxial cables with fiber-optic cables.
In twisted-pair cable and coaxial cable, data is transmitted in the form of electric frequencies. So copper wire has to be protected from water and electromagnetic waves. In fiber optic cable, these types of problems are not occurred.
The data transmission speed is very high because fiber-optic cable uses light to transmit data. The data transmission speed is up to billions bits per second. An important characteristic of fiber optic is refraction. Refraction is the characteristic of a material to either pass or reflect light. When light passes through a medium, it bends as it passes from one medium to the other.
The advantages of fiber optic cable are:
Its transmission capacity is about 26,000 times greater than twisted pair media - up into the gigabits and more reliable (lower data transmission errors).
It has high level of security and much thinner and lighter than other metal wires.
Fiber optic not affected by electromagnetic noise for example radios, motors and others cables.
The disadvantage of fiber optic is that the cables are very costly and difficult to install.
Therefore the fiber-optic cable is becoming more popular and replacing all old cable system. Today telephone, banks, and television companies are replacing their existing telephone and coaxial cables with fiber-optic cables.
Tips Choosing DSL Providers
Today there are many DSL providers offering DSL connection in all cities and some rural areas. DSL internet provides high speed on already exiting telephone lines, and same time you can use internet and as well as your line for phone. Now the selection of DSL provider depends upon your home or office location from DSL services provider office, telephone exchange updating status and your needs to using broadband connection. First of all visit your nearest DSL service provider to collect the information about their monthly rate, data speed, installation fees, modem rate and traffic allowed in one month. Mostly DSL provider offering traffic allowed up to 1 GB with basic 128 Kbps internet connection. But if you want to play online games, downloading audio or video files and uploading data, then the traffic allowed(1 GB) in one month from DSL provider will be the main issue for you. May be some DSL provider offering you up to 2 GB or more with the same rates. Always consider their customer support and modem warranty strategy whether they are offering free or paid service in case any problem after getting connection.
Some DSL providers offer more benefits for you with DSL connection to compete with others services provider like first one month free, free modem and some antivirus software. Meanwhile some ISP offers you discount package if you will pay them 6 to 8 months advance internet monthly payments. At the end I recommend you, always choose your nearest DSL service provider for good internet speed with minimum problem because distance also matter in DSL.
Some DSL providers offer more benefits for you with DSL connection to compete with others services provider like first one month free, free modem and some antivirus software. Meanwhile some ISP offers you discount package if you will pay them 6 to 8 months advance internet monthly payments. At the end I recommend you, always choose your nearest DSL service provider for good internet speed with minimum problem because distance also matter in DSL.
DSL reports tools
DSL reports tools is used to monitor the history of internet usage. These tools generate the DSL session reports (for example Start Time, Duration, Accumulated Duration, Used Bytes Accumulated Used Bytes, Caller ID and user IP Address) to solve end user problem and to improve the DSL services. Many DSL providers offer free report generator tools with their internet service. These tools can be used on both ends (user end and ISP). These tools can also monitor the user internet web pages history, messenger sign in history and errors detail.
There are many DSL providers offers free speed test reports software with Internet connection package to check speed frequently and this speed test software generate the full month speed history. Many third parties software provider companies offer free speed check software on internet, download and use it to monitor speed constantly. Yon can test speed using any website for this purpose, search speed test tools websites using any search engine. DSL speed test result will be different in different times, may be fast during early morning and slow at peak hours. You should get the results in different hours then with the help of average decide about the actual speed.
There are many DSL providers offers free speed test reports software with Internet connection package to check speed frequently and this speed test software generate the full month speed history. Many third parties software provider companies offer free speed check software on internet, download and use it to monitor speed constantly. Yon can test speed using any website for this purpose, search speed test tools websites using any search engine. DSL speed test result will be different in different times, may be fast during early morning and slow at peak hours. You should get the results in different hours then with the help of average decide about the actual speed.
WiMAX Wireless Broadband Info
WiMAX stands for World Interoperability for Microwave Access that enables the actual broadband wireless network with high speed.
WiMAX operate same like WiFi but WiFi operate with some limitation like it is base band technology and cover only 100 feet radius with slow speed.
WiMAX covers a radius of 50 Km and work with the speed of 70 Mbps. WiMAX is the replacement of the wired broadband.
In wired broadband connection, we can transmit data with 512 Kbps to 10 Mbps speed and more, for example DSL broadband and cable broadband.
In future all new desktop and notebook computers will be incorporated with WiMAX technology.
With this technology you will be connected to the internet even you are driving your car with the speed of 120 Km.
WiMAX operate same like WiFi but WiFi operate with some limitation like it is base band technology and cover only 100 feet radius with slow speed.
WiMAX covers a radius of 50 Km and work with the speed of 70 Mbps. WiMAX is the replacement of the wired broadband.
In wired broadband connection, we can transmit data with 512 Kbps to 10 Mbps speed and more, for example DSL broadband and cable broadband.
In future all new desktop and notebook computers will be incorporated with WiMAX technology.
With this technology you will be connected to the internet even you are driving your car with the speed of 120 Km.
DSL Speed Test
DSL (Digital Subscriber Line) is basically 24-hours on internet connection and working with high speed up to 10 Mbps. DSL service provider offering different packages with speed 128 Kbps to 10 Mbps. But the actual speed at user end may be different from user to user due to the modem speed, telephone line condition and the distance between services provider to user home. If you want your DSL working with good speed and error free then make sure there is no any joint between telephone line tower and modem line. Your DSL modem may be heat up, hang and slow, if your DSL modem continually on for 24-hours, then restart it to solve this problem.
There are many DSL providers offers free speed test software with Internet connection package to check speed frequently. Many third parties software provider companies offer free speed check software on internet, download and use it to monitor speed constantly. Yon can test speed using any website for this purpose, search speed test tools websites using any search engine. DSL speed test result will be different in different times, may be fast during early morning and slow at peak hours. You should get the results in different hours then with the help of average decide about the actual speed.
There are many DSL providers offers free speed test software with Internet connection package to check speed frequently. Many third parties software provider companies offer free speed check software on internet, download and use it to monitor speed constantly. Yon can test speed using any website for this purpose, search speed test tools websites using any search engine. DSL speed test result will be different in different times, may be fast during early morning and slow at peak hours. You should get the results in different hours then with the help of average decide about the actual speed.
Tips for DSL Broadband
What is Broadband?
Broadband is another communication technique in which large amount of data for example audio and video, is transmitted over long distances simultaneously. In broadband transmission, FDM (Frequency Division Multiplexing) technique is used, in which multiple signals can be transmitted simultaneously. Broadband is the bandwidth used for direct communication between very high speed in mainframe computer. This bandwidth includes satellites, fiber optics media.
What is DSL Broadband?
DSL Broadband basically a high bandwidth internet connection that can transmit and download large amounts of date or information with high speed. You can transmit data 10 times faster than a dial-up connection. We can transmit data in broadband with 512 Kbps to 10 Mbps speed and more. There are many broadband Internet connection providers are available for users but the main competitor of DSL broadband is the cable internet broadband. If the both services are available in your area then always go for DSL broadband due to its reliability and dedicated internet connection as compare to cable broadband.
Advantages and Disadvantages of DSL Broadband Internet Connection
DSL Broadband Internet data transmission speed start from 128 Kbps up to 10 Mbps.
DSL is dedicated connection not shared with other internet user.
DSL monthly rates are between 50$ to 100$.
Your internet speed will depends upon the distance between your home to DSL provider.
Advantages and Disadvantages of Cable Broadband Internet Connection
Cable Broadband Internet Connection data transmission speed is start from 64 Kbps to 30Mbps.
Cable internet is not a dedicated connection but shared with other internet user.
Cable monthly rates are between 30$ to 60$.
No distance matter with Cable connection between your home to Cable provider.
Broadband is another communication technique in which large amount of data for example audio and video, is transmitted over long distances simultaneously. In broadband transmission, FDM (Frequency Division Multiplexing) technique is used, in which multiple signals can be transmitted simultaneously. Broadband is the bandwidth used for direct communication between very high speed in mainframe computer. This bandwidth includes satellites, fiber optics media.
What is DSL Broadband?
DSL Broadband basically a high bandwidth internet connection that can transmit and download large amounts of date or information with high speed. You can transmit data 10 times faster than a dial-up connection. We can transmit data in broadband with 512 Kbps to 10 Mbps speed and more. There are many broadband Internet connection providers are available for users but the main competitor of DSL broadband is the cable internet broadband. If the both services are available in your area then always go for DSL broadband due to its reliability and dedicated internet connection as compare to cable broadband.
Advantages and Disadvantages of DSL Broadband Internet Connection
DSL Broadband Internet data transmission speed start from 128 Kbps up to 10 Mbps.
DSL is dedicated connection not shared with other internet user.
DSL monthly rates are between 50$ to 100$.
Your internet speed will depends upon the distance between your home to DSL provider.
Advantages and Disadvantages of Cable Broadband Internet Connection
Cable Broadband Internet Connection data transmission speed is start from 64 Kbps to 30Mbps.
Cable internet is not a dedicated connection but shared with other internet user.
Cable monthly rates are between 30$ to 60$.
No distance matter with Cable connection between your home to Cable provider.
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