The Low Noise Block is an essential part of a satellite receiver which receives the signal and amplifies it for use. It is always located with the satellite antenna.
Low Noise Block - Part of the antenna dish that amplifies the received signal from the antenna and converts it from a microwave signal to a lower frequency signal. The lower frequency signal, can then be carried on coaxial cable to the DirecPC adapter.
Low Noise Block down-converter; Replaced LNA's used in older satellite & microwave systems, amplifies signal and down-converts signal to a lower intermediate frequency in order to reduce feedline losses.