Bluetooth 2.0 Compatibility

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If you look at the descriptions of most new devices, like laptops, cell phones and tablet PCs, you'll frequently see "Bluetooth" mentioned. Bluetooth is a major communication tool and a good connection option for many devices, regardless of the type of device or what software is running on the device. Fortunately, Bluetooth versions are fully compatible with each other.

How Bluetooth Works

Bluetooth is a common and versatile use of radio waves for communication and is managed by Bluetooth Special Interest Group (SIG). Using Bluetooth is a little like using a Wi-Fi network: Both devices must have proper hardware and software to be able to communicate with each other and both must establish a connection for transferring data wirelessly. Most Bluetooth devices have a range of 30 to 35 feet, though a few have significantly higher range.

Bluetooth 2.0 Backward Compatibility

There are four versions of Bluetooth, though as of early 2011, version 2 is the most commonly used option. Earlier versions include Bluetooth 1.0 and Bluetooth 1.2, which are significantly slower than version 2.0 and do not have as many security features. However, Bluetooth 2.0 is fully compatible with earlier versions, so if you have a device with 1.0 or 1.2 on it, you can connect it with a device that has Bluetooth 2.0.

Bluetooth 2.0 Forward Compatibility

Although version 4.1 is available, not as many devices use that version or even 3.0 when compared to 2.0. However, Bluetooth SIG has kept backwards-compatibility a priority, so if you have a device with a version higher than 2.0, it can still communicate with Bluetooth 2.0. Again, when connecting with lower-version devices, the data rate and security is capped by the lowest version.

Uses of Bluetooth 2.0

Some of the most common applications of Bluetooth are in mobile devices, like cell phones and MP3 players. Instead of physically plugging these devices into a computer, you're able to sync them wirelessly with Bluetooth and transfer data like calendar items, music files and video clips. Some printers even have Bluetooth capabilities, so you can print using a computer or a mobile device that's not physically connected to the printer.

How to Safely Remove Computer Hardware

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This article will show you how to remove hardware such as mp3 devices and cell phone from your desktop safely.

1). You've heard it before, "safely remove hardware". It pops up every time you plug a device into your computer through some sort of cable. What a lot of people don't know is that if you don't safely remove this hardware, it could throw your entire hard drive out of whack.

2). The first step in safely removing hardware is choosing the disconnect button from any software it might be connected too. This includes cell phone software, music software like iTunes that your iPod might be connected too, or just a device you use for work or school.

3). Once the software is disconnected, you can disconnect the device from the cord.

4). After the device is completely disconnected, remove the cord from the computer. Make sure when removing the cord that you do not pull it out wrong. Pull it straight out and if any prongs or buttons need to be pushed in, make sure they are. If done wrong, you could damage the cord or even worse, damage your computer.

Computer Hardware Diagnostics Tools

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A computer can have issues in either of its two main components; hardware or software. While software issues are generally resolvable through the built-in repair function of the software, hardware issues require proper diagnosis and evaluation before they can be resolved.

Hardware Diagnostic Tools

Computer hardware diagnostic tools can be either software written expressly for detecting problems with a computer's hardware or external machines that help find what is wrong with the system. Software too can be of two types:

·        Internal, Computer software diagnostic programs reside on the computer with other software to find and resolve hardware issues.

·        External, External tools, on the other hand, are used from outside the computer to scan for hardware issues without operating system influence.

Function

There are two main methods for computer hardware diagnostic tools:

·        Black box methods use known input and output data to analyze issues with the hardware without actually knowing how it works.

·        White box techniques on the other hand test issues directly by understanding the inner functions of the hardware.

There are also continuous monitoring diagnostic systems that monitor operations as they happen to scan for issues.

Types

Computer hardware diagnostic tools can be single-purpose, multipurpose or modular.

·        Single-purpose hardware diagnostic tools have been designed to check for problems in a particular module or hardware only.

·        Multipurpose tools on the other hand would be programs that while created for one main component, also provide troubleshooting options for other hardware components, though at lesser accuracy.

·        Modular diagnostic tools on the other hand are like a kit containing many single-purpose tools that can quickly be applied to check for issues across the board.

Self-Diagnostic Tools

Certain computer hardware components come with built-in self-diagnostic features that allow for easy assessment of the problem. For example, most network routers come with a command prompt function through which hardware experts can determine what is wrong with the router and resolve the issue through a predefined set of commands. Similarly, many hardware devices also have log functions that automatically log all failure events and automatically correct any mis-alignments.

Use

Computer hardware diagnostic tools find application in a wide range of environments, right from manufacturing testing for quality checks to end-client diagnostic testing for easy resolution of live working problems.

These tools can be used directly by a trained technician on the computer system in question or remotely by the service team through an Internet or network connection.

Tutorial for a Cable STB to a PC

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Connecting a cable set top box (STB) to a personal computer (PC) is fairly straightforward, providing the PC has a device that allows it to receive digital television signals -- a digital TV tuner -- installed.

TV Tuner

TV tuners come in two basic forms, internal and external. Internal TV tuners are typically cards that must be installed inside your computer, while external TV tuners typically plug into a universal serial bus (USB) port.

Connection

Assuming that your set top box is already connected to the cable source at the wall jack, connecting the box to your PC involves running a cable from the cable output jack on the box to the input jack on the TV tuner. If you have more than one TV tuner, each tuner needs its own TV signal; you can split the cable signal from the wall jack with a cable splitter, if necessary. 

Software/Hardware

Aside from the physical cable connection between the set top box and the TV tuner inside, or attached to, your PC, you need some software -- and possibly some additional hardware -- to control the way TV pictures are displayed and to change TV channels. In some cases, you can attach a remote control that allows you to change channels directly from your PC.

Visual Display Unit Characteristics

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 Computers are a common part of the lives of most individuals. However, like the operation of many household appliances, computer desktop owners do not normally comprehend how their devices work. Visual display units or VDUs, are the monitor part of a desktop computer, which allow users to see the information they work with.

Types

Three types of computer monitorsor visual display units are available. These are the LCD flat panel, the CRT or cathode ray tube monitor and the TFT-LCD monitor. CRT VDUs are enclosed in a large box-shaped casing and represent the older types of computer monitors that exist today. LCD, liquid crystal, monitors are flatscreen, thin visual display units that take up much less space than CRTs. In addition, the LCDs come in widescreen as well as standard screen models and can be designed with add-ons, such as Super Video Graphic Display Array and Digital Video Interface technologies. TFT-LCD monitors are thin film transistor monitors.

Operation

An electronic beam within the visual display unit consistently scans the screen and collects data from the memory. Display memory is then transferred into video signals and in turn, the video signals manipulate the electronic beam, affecting what is shown on the display. This type of scan is known as a Raster scan. Once the electronic beam has been altered, that beam focuses on the phosphorous material that coats the inside of the visual display unit, causing the screen to illuminate.

Magnetic Fields

All electronic devices emit magnetic and electrical fields to some degree. Older visual display units that contain tubes inside the display screen have higher magnetic fields than flatscreen display units. Additionally, display units with internal tubes also emit low-intensity X-rays and non-ionizing radiation. Yet the radiation is quite minimal and not considered a health risk. Flatscreen display units, on the other hand, have no internal tubes and emit zero X-rays or radiation.

Sizes

Visual display units come in a variety of sizes. Monitors are available in 15-inch, 17-inch, 19-inch and 21-inch styles. The size of the monitor is the size of the screen, not the size of the entire monitor. Fifteen-inch monitors are sufficient for casual computer users, while 17-inch screens are more acceptable for individuals that use their computers frequently. The 19-inch and 21-inch monitors, on the other hand, were created for individuals who use their computers for design and editing.

Uses of a Netgear Wireless USB Adapter

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 The USB wireless adapter does not require you to open up your computer case for installation, so it is much less complicated to add to your computer than an internal network interface card. Netgear makes several models of its wireless adapter to accommodate different usage scenarios.

Notebook

If your notebook computer does not come with wireless, a Netgear wireless adapter allows you to easily connect to your wireless network. Installing an internal card is rarely an option with a laptop, and smaller-scale laptops such as netbooks have a limited number of interface slots.

Desktop

Older desktop computers may not be compatible with PCI wireless network cards, but the USB interface is supported without conflict. The USB wireless adapter gives the older computer a way to get on your wireless network for Internet access. USB wireless adapters are also useful for people who are not comfortable with installing a network card in their computer. The USB adapter installation process takes only a few minutes, and most of that is used by software installation.

Repair

When the onboard wireless networking capabilities of the computer are not working, the card may be damaged, dead or experiencing drive and incompatibility issues with another device on the computer. You can use the adapter to get Internet access on the computer you are troubleshooting without having to worry about replacing the malfunctioning card right away.

Models

Netgear makes three different categories of USB adapters: simple-sharing, work-and-play and high-performance. The simple-sharing models are basic USB wireless adapters that have a straightforward installation procedure, low price and straightforward usage. Work-and-play models are compatible with wireless N networks for faster download speeds, along with backward compatibility with wireless G. High-performance Netgear models utilize dual band, so any wireless interference is minimized. The high-performance models are the most expensive of the three categories.

Add an HDTV Tuner

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With the addition of an HDTV tuner, you can turn your computer into a personal home theater. Installing one will give you access to free over-the-air high-definition signals as well as the ability to program and record television shows to your hard drive to watch whenever you want. There are two types of tuners: PCI card and USB tuner. They are both fairly simple to add, and provide the same function.

1). Unplug the power cable and any other peripherals that are connected to your computer.

2). Open your computer case. Consult your computer manual for specific instructions on how to do so. Place your computer on its side with the open face up.

3). Locate an open PCI slot on your computer and remove the panel cover. You will need the screwdriver to remove the bolt that holds the panel covers in place.

4). Place your tuner into the PCI slot. Make sure that the card is securely fitted into the slot and the external connectors are flush with the open panel on the back of your computer.

5). Connect a cable line to the HDTV tuner on the back of your computer.

USB

1). Connect the USB HDTV tuner to an open USB slot on your computer.

2). Install the software that came with the tuner.

3). Connect a cable line to the tuner.