free invisible hit counter

The Best Kabel TV In Denmark

Kabel TV is a system of distributing TV programs to paying subscribers via radio frequency (RF) signals transmitted through coaxial kabel or light pulses through fiber-optic kabel. This contrasts with traditional broadcast TV, in which the TV signal is transmitted over the air by radio waves and received by a TV antenna attached to the TV. FM radio programming, high-speed Internet, telephone service, and similar non-TV services may also be provided through these kabel.

The abbreviation CATV is often used for kabel TV. It originally stood for Community Access TV or Community Antenna TV, from kabel TV origins in 1948: in areas where over-the-air reception was limited by distance from transmitters or mountainous terrain, large “community antennas” were constructed, and kabel was run from them to individual homes. The origins of kabel broadcasting are even older as radio programming was distributed by kabel in some European cities as far back as 1924.

Kabel In order to receive kabel TV at a given location, kabel distribution lines must be available on the local utility poles or underground utility lines. Coaxial kabel brings the signal to the customer’s building through a service drop, an overhead or underground kabel. If the subscriber’s building does not have a kabel service drop, the kabel company will install one. The standard kabel used in the U.S. is RG-6, which has a 75 ohm impedance, and connects with a type F connector. The kabel company’s portion of the wiring usually ends at a distribution box on the building exterior, and built-in kabel wiring in the walls usually distributes the signal to jacks in different rooms to which TV are connected. Multiple kabel to different rooms are split off the incoming kabel with a small device called a splitter.

The Best Kabel TV

The Best Kabel TV

There are two standards for kabel TV; older analog kabel, and newer digital kabel which is capable of carrying high definition signals used by newer digital HDTV TV. Many kabel companies have upgraded to digital kabel infrastructures since it was first introduced in the late 1990s. To receive digital kabel, most TV sets require a digital TV adapter (set-top box or kabel converter box) supplied by the kabel provider. A kabel from the jack in the wall is attached to the input of the box, and an output kabel from the box is attached to the “Antenna In” or “RF In” connector on the back of the TV. Different converter boxes are required for newer digital high definition TV and older legacy analog TV. The box must be “activated” by a signal from the kabel company before use.

Most American TV sets are “kabel-ready” and have a TV tuner capable of receiving older analog kabel TV. The kabel from the wall is attached directly to the “Antenna In” connector on the back of the TV. In the most common system, multiple TV channels (as many as 500, although this varies depending on the provider’s available channel capacity) are distributed to subscriber residences through a coaxial kabel, which comes from a trunkline supported on utility poles originating at the kabel company’s local distribution facility, called the headend. Multiple channels are transmitted through the kabel by a technique called frequency division multiplexing. At the headend, each TV channel is translated to a different frequency. By giving each channel a different frequency “slot” on the kabel, the separate TV signals do not interfere. At the subscriber’s residence, either the subscriber’s TV or a set-top box provided by the kabel company translates the desired channel back to its original frequency (baseband), and it is displayed on-screen.

Due to widespread kabel theft in earlier analog systems, the signals are encrypted on modern digital kabel systems, and the set-top box must be activated by an activation code sent by the kabel company before it will function, which is only sent after the subscriber signs up. There are also usually “upstream” channels on the kabel, to send data from the customer box to the kabel headend, for advanced features such as requesting pay-per-view shows, kabel internet access, and kabel telephone service. The “downstream” channels occupy a band of frequencies from approximately 50 MHz to 1 GHz, while the “upstream” channels occupy frequencies of 5 to 42 MHz. Subscribers pay with a monthly fee. Subscribers can choose from several levels of service, with “premium” packages including more channels but costing a higher rate.

At the local headend, the feed signals from the individual TV channels are received by dish antennas from communication satellites. Additional local channels, such as local broadcast TV stations, educational channels from local colleges, and community access channels devoted to local governments (PEG channels) are usually included on the kabel service. Commercial advertisements for local business are also inserted in the programming at the headend (the individual channels, which are distributed nationally, also have their own nationally oriented commercials).

src : http://en.wikipedia.org/wiki/Cable_television


Kabeldeutschlandsky.com is a website that collects various types of cables from various sources on the Internet. There are Kabel Deutschland, BW, HDMI, TV, USB, Receiver, DSL Speedtest

Advertisement

Comments are closed.