Posts Tagged ‘Satellite’

Satellite TV vs. Cable TV

Posted in Theory on March 16th, 2010 by admin – Be the first to comment

     Satellite television is subject to quite a few myths. Viewing via satellite is reliable and unlike the bygone era, rain and gales do not affect presentation. The technology has advanced with time and is very effective in delivering entertainment at the click of a button. Channel variety, programming and dedicated networking is also a part of the Satellite TV package. The service is provided by dedicated online and offline service providers, who also educate clients on the stability enhancing techniques and practices. Satellite TV is cheap and comes along with high definition content. The latest technological enhancements of Satellite TV include the ability to record and store entertainment for as long as desired. The investment is a one-time bargain, with the only add-ons coming in with subsequent upgradation and the electricity bill. Installation of Satellite TV is usually a free service and even if charged in some cases, the rates are very reasonable. Satellite television is also marketed as part of company package deals, where certain household appliances are offered free-of-cost with the purchase.

     Cable TV: read more »

Satellite Dish Antenna

Posted in Theory on March 16th, 2010 by admin – Be the first to comment

     Before we talk about the installation of of a satellite antenna, let us understand its working. The parabolic shape of a dish antenna is designed to capture incoming satellite signals (electromagnetic waves) and focus it to a central focal point, where it is concentrated and fed to a ‘feedhorn’. This feedhorn is a waveguide (a device that directs electromagnetic waves) shaped in the form of a cylindrical structure usually, and positioned at or near the focal point of parabolic dish antenna with the use of brackets. This waveguide directs the incoming signal to a LNB (Low Noise Block Down Converter), which is an transducer that converts electromagnetic waves into electric signals. It also shifts the frequency from the frequency of C-band (500 MHz – 1000 MHz) or Ku band (12GHz – 18 GHz) to the L-band (1 GHz – 2 GHz) frequencies.

     In most home use satellite dishes, the feedhorn and the LNB are integrated into one device called LNBF. The gain or power of signal received is dependent on the perfection of the dish shaping and the waveguide matching. Normal home use parabolic antennas are around 43 cm – 80 cm in diameter and are positioned for reception of incoming Ku Band reception. Read more on how does satellite dish work.

     Satellite Dish Antenna Installation
     With that introduction to the working of a satellite dish antenna, let us now have a look at the procedure for satellite dish installation. First part of installation is of course gathering the required equipment and tools for installation.

     There are two main parts of satellite dish installation. First is fixing the mast of the dish antenna and second is fixing the dish on the mast and orienting it in the exact direction to get the maximum signal strength. The rest of the part is just connecting your dish antenna to your TV, using a coaxial cable. read more »


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