1. 
   QAM (Quadrature amplitude modulation)
   One of the two modulation methods considered for MCNS (Multiple Cable Network Systems). Permits bit rates up to 36 Mbit/s.
   Found op http://www.isomatic.co.uk/WBGlossary.htm
   
   
2. 
   QAM (Quadrature Amplitude Modulation)
   A digital modulation format used for downstream transmission in cable TV systems — commonly used for cable HDTV.
   Found op http://www.crutchfield.com/S-np170FLGK7y/learn/learningcenter/home/tv_gloss
   
   

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