OVERALL LNB GAIN
Most LNBs publish an impressive gain figure of approximately 65 dB. While several advertisements
trumpet this figure, a 65 dB gain is fairly standard and is required of all LNBs to amplify the
microwave signals to levels required by the satellite receiver. The buyer need not pay undue
attention to this parameter. A far more important specification is the Noise temperature, which
indicates how much Noise is added to the signal, by the LNB !
It is hoped that this article will provide readers a basic understanding of S, C & Ku band LNBs,
including the relevance & importance of noise & the various IF & Local Oscillator frequencies. ■