title: Software Phase Locked Loop example code needed
body: <p>Does anyone know of anywhere I can find actual code examples of Software Phase Locked Loops (SPLLs) ? </p>
  
  <p>I need an SPLL that can track a PSK modulated signal that is somewhere between 1.1 KHz and 1.3 KHz. A Google search brings up plenty of academic papers and patents but nothing usable. Even a trip to the University library that contains a shelf full of books on hardware PLL's there was only a single chapter in one book on SPLLs and that was more theoretical than practical.</p>
  
  <p>Thanks for your time.</p>
  
  <p>Ian</p>