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Marine audio installation differs from other vehicle audio installations because there is not only one location in a boat that you can install it. For cars, you would always place the audio system in the dashboard. However, in boats there are space and power limitations you have to work with during the installation process. If you are... more »
Satellite television has grown from a few hundred subscribers in the early 1990s to several million. DirecTV and Dish Network are the two leading satellite television providers in the United States. To get satellite service you need a satellite dish properly installed, an active account and at least one satellite receiver connected.... more »
DirecTV and Dish Network are the leading satellite companies that provide satellite programming packages in the United States. In order to receive the required signal from the satellite, you must have a few things first. It is necessary to have a properly installed satellite dish. This dish must have the proper wires (coaxial cable)... more »
Satellite television is a popular alternative to cable or antenna programming. However, it cannot be split and sent to as many TV sets as you want. Each television needs to have a satellite receiver connected to it. A typical satellite setup uses a satellite dish with a dual LNB (low-noise block converter) that is capable of handling... more »
A TV monitor can be used primarily in four ways: to watch cable or satellite programming, to play video games, to watch digital media such as movies on DVD and Blu-Ray, and to view and hear information on a personal computer or laptop. Most new TV monitors are equipped with a variety of connection options on the back panel, such as... more »
The Delphi Roady XT is one of the newest XM radio models released by the Delphi Company. The Roady XT has a sleek design and custom displays that... more »
Satellite radio is an innovative medium that has several advantages over conventional radio, such as the ability to maintain a signal over all of... more »
Unlike AM/FM radio, satellite radio requires specific equipment to receive its signal. Satellite radio receivers are the primary piece of... more »
An FTA or free to air satellite receiver is required in order to receive transmissions that have been decoded using MPEG 2 data compression. FTA... more »
If you are interested in making a switch from cable to satellite TV, or want to move your current DirecTV setup, you can actually do it on your... more »
A set-top box (STB) or set-top unit (STU) is a device that connects to a television and an external source of signal, turning the signal into content which is then displayed on the television screen.
History
Before the mid-1950s all British television sets tuned only VHF Band I channels. Since all 5 Band I channels were occupied by BBC transmissions, ITV would have to use Band III. This meant all the TV sets in the country would require Band III converters which converted the Band III signal to a Band I signal. By 1955, when the first ITV stations started transmitting, virtually all new British Televisions had 13-channel tuners, quickly making Band III converters obsolete.
Before the All-Channel Receiver Act of 1962 required US television receivers to be able to tune the entire VHF and UHF range (which in North America was NTSC-M channels 2 through 83 on 54 to 890 MHz), a set-top box known as a UHF converter would be installed at the receiver to shift a portion of the UHF-TV spectrum onto low-VHF channels for viewing. As some 1960s-era twelve-channel TV sets remained in use for many years, and Canada and Mexico were slower than the US to require UHF tuners to be factory-installed in new TVs, a market for these converters continued to exist for much of the 1970s.
Cable television represented a possible alternative to deployment of UHF converters as broadcasts could be frequency-shifted to VHF channels at the cable head-end instead of the final viewing location. Unfortunately, cable brought a new problem; most cable systems could not accommodate the full 54-890 MHz VHF/UHF frequency range and the twelve channels of VHF space were quickly exhausted on most systems. Adding any additional channels therefore needed to be done by inserting the extra signals into cable systems on non-standard frequencies, typically either below VHF channel 7 (midband) or directly above VHF channel 13 (superband).
These frequencies corresponded to non-tel read more at » http://en.wikipedia.org/wiki/Set-top+box
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