modulation code การใช้

• In addition to the normal Content Scramble System ( CSS ) encryption, DIVX discs used Triple DES encryption and alternative channel modulation coding scheme, which prevented them being read in normal DVD players.
• Large commercial dishes of 3.7 m to 13 m diameter can be used to achieve increased rain margins and also to reduce the cost per bit by allowing for more efficient modulation codes.
• It is the presence of the ubiquitous silent ( off ) periods in CW that is the most important aspect of the Morse code OOK modulation code that provides the " listen while sending " support for so-called " QSK operation ".