LNB stands for Low-Noise Block Downconverter and is a dish head which converts microwave signals from satellites into a signal that is understandable to the digital box. A universal LNB head receives both polarisations (horizontal and vertical) and the full range of frequencies in the satellite’s Ku-band.
Satellite signals are very poor at underground, building etc., and a satellite dish with LNB must therefore always be placed outdoors and point in the right direction. These types of LNB are suitable for receiving all the digital signals sent from a single satellite position. The LNB receives the signal collected by the satellite antenna, amplifies that signal, and then downconverts those signals to a lower frequency, typically IF-band or L-band which is better suited to transmission over a coaxial cable to your receiving device.
Satellite television is a miracle of modern technology, delivering clear, crisp picture and sound from satellites thousands of miles away, captured by a relatively small satellite dish. The electronics that make this possible are designed to be weatherproof to withstand the test of time, although they do sometimes need replacing. Other times, you may want to upgrade your dish’s capabilities, and occasionally that can be done without replacing the entire dish. All you need to do is replace the LNB.
