1. 
   LNB
   Low Noise Block - the 'horn' thing fitted to the arm of your dish. This collects the signal from the satellite, according to the specified polarisation, converts it to a lower frequency so it can be sent down a wire, all for your Digibox to receive!
   Found op http://www.heyrick.co.uk/ricksworld/digibox/glossary.html
   
   
2. 
   LNB
   Low-Noise Blocker. The receiving end of a satellite dish.
   Found op http://www.encyclo.co.uk/local/21058
   
   

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