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Identifying Digital Signals
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 		 There are a wealth of digital signals that can be heard throughout the radio spectrum, many of these can be readily identified by ear.  However, recognizing the many new systems appearing every few months can require extensive investigation to identify the manufacturer and possible users. 

Fortunately, there are some excellent resources on the web allowing you to listen to audio clips of these signals, identify the system in use or learn more about a known signal.  Here are my favourites: 
 

  • LDO's excellent Digital Signals Pages contain a growing library of digital signals heard chiefly between 1 and 30 MHz.
  • Stan Scalsky and I compiled the Digital Signals FAQ, with a wealth of information about HF digital signals, their parameters, known users and available decoding equipment.
  • I also write the monthly "Digital Digest" column in Monitoring Times, the premier magazine devoted to radio listening.

Last Modified: 20th December 1999
Content copyright Mike Chace-Ortiz.  No commercial use of these pages and their content allowed unless by prior permission of the author