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    • How a Rear Projection TV Works

      How a Rear Projection TV Works

      As it sounds, a projection television, or more commonly a "rear-projection" TV work by projecting an image from behind the screen itself. Currently, there are three main types of technology used in rear-projection TV's: CRT, LCD, and DLP. Each uses a combination of projection devices, magnification lenses, mirrors, and screens to produce the image seen.

    • Conditional Access System

      Conditional Access System

      A Conditional Access System, or CAS, is a type of system used in Internet and television broadcasts in order to restrict unauthorized users from accessing channels or services that they have not paid for and allow subscribers who have paid for services to access the specific services they purchased. Conditional Access Systems are most commonly

    • How Does TiVo Work?

      How Does TiVo Work?

      A common word that is constantly uttered in our society, TiVo has revolutionized the way we watch TV. With its many features and functions that allow you to pause, record, and rewatch television, TiVo has quickly ushered in an age in which we no longer watch commercials and we don't worry about being home at

    • Nagravision


      Nagravision is a company that develops conditional access systems for cable and satellite television. These conditional access systems usually involve encryption. There are currently three types of Nagravision versions in place; they are all used for digital cable and digital satellite television. They include Nagravision, Nagravision A and Nagravision Aladdin. Nagravision is generally used for

    • Satellite Receivers

      Satellite Receivers

      Satellite receivers come in standard, HD tuners, DVR, or FTA formats. In a standard receiver, the digital broadcast signal is decoded and presented in the television in an analog format. Most satellite receivers feature an Electronic Program Guide (EPG), which contains a list of the available channels and programming. HD Receivers Made for high-definition satellites

    • Multimedia


      Multimedia is simply multiple forms of media integrated together. Media can be text, graphics, audio, animation, video, data, etc. An example of multimedia is a Mozart web page that has text regarding the composer, an audio file of some of his music, and even a video of his music being played in a hall. Besides

    • How to Convert Audible AA Files to MP3

      How to Convert Audible AA Files to MP3

      An Audible AA file is a type of audio file format that is used with Audible eBooks. Only certain eBook readers are able to open and play Audible AA files but third-party software may be combined with specific PDF readers or other text editors in order to play this file format. Audible AA files are

    • Interactive TV

      Interactive TV

      Interactive TV is when the viewer and broadcaster can communicate with each other, usually in real time. Normal TV flows in a one way path, from the broadcaster to the viewer, however interactive TV, usually includes a digital modem or other form of hardware that can return information or data from the viewer back to

    • How Long Do Audio Cassette Tapes Last?

      How Long Do Audio Cassette Tapes Last?

      When properly cared for, an audio cassette tape can last 30 years or longer. However, many factors can shorten that lifespan considerably. The two most common causes of premature tape death are equipment malfunction (“The cassette player ate my tape!”) and heat (“The radiator melted my tape!”). Cassette Tape Lifetime Factors All cassette tapes were

    • What is a Cutoff Frequency?

      What is a Cutoff Frequency?

      Cutoff frequency (corner or break frequency) is commonly used in the physics and electrical engineering fields. This frequency causes a device to stop operating in an efficient manner, resulting in it shutting down or being cut off. More technically, the cutoff frequency reduces energy flow through the device and prevents it from working as designed.

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