From Free Knowledge Base- The DUCK Project: information for everyone
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Since corporate greed has stifled the proliferation of FTA in North America, some factors have allowed for FTA growth anyway. Today the C-band satellite channels in North America are viewed using 4DTV receivers, which use a version of Digicipher 2, take advantage of MPEG2 digital technology, but use a proprietary, incompatible version and therefore are not FTA compatible. They are different because the signals are layered together differently. Since corporate greed has stifled the proliferation of FTA in North America, some factors have allowed for FTA growth anyway. Today the C-band satellite channels in North America are viewed using [[Motorola_4DTV_Satellite_Technology|4DTV]] receivers, which use a version of Digicipher 2, take advantage of MPEG2 digital technology, but use a proprietary, incompatible version and therefore are not FTA compatible. They are different because the signals are layered together differently.
