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Text File  |  1999-10-23  |  207b  |  13 lines
  1. The signal's circular polarization rotates 
  2.  
  3. The signal's polarization changes from horizontal to vertical
  4.  
  5. The signal's frequency increases or decreases
  6.  
  7. The signal's amplitude increases or decreases
  8.  
  9.  
  10.  
  11. 2
  12.  
  13.