What is an LNB?
LNB is short for Low Noise Block-converter, it contains the LNA and a Block down-converter, it amplifies the very weak satellite signal and converts it to a lower frequency so it can be processed by the Satellite receiver. Like an LNA, LNB’s are also rated in degrees Kelvin except for Ku band LNB’s which are rated in db noise factor. No matter which rating is used, the lower the rating the better the LNB.
LNB stands for Low Noise Block downconverter. An LNB detects the signal relayed from the feed, converts it to an electrical current, amplifies it and lowers its frequency. The downconverted signal is relayed via coax cable to an indoor satellite receiver or DVB card. You have analogue LNBs with a frequencies range from 10.950 to 11.700 GHz and Universal (digital) LNBs, which cover our frequency, range up to 12.75 GHz.
A. LNB (Low Noise Block Converter) The LNB, sometimes also called the LNC, is the receiving head that is positioned at the focal point of a parabolic dish antenna. It amplifies and converts the satellite signals, and prepares them for further processing by the satellite receiver. Generally the lower the noise figure given for an lnb, the better it will perform eg 0.3db is a good lnb, 0.7db is not so good.
