Digital Modes
Training

Our thanks to Dave, NNN0RDO,
for developing Digital Modes parts I and II training files and freely sharing them with MARS members;
and thanks to Gary, NNN0KUL for the part III training file 
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These files may be freely shared and used among all the MARS services.  To obtain permission for any other use contact Dave (nnn0rdo@navymars.org).  Please read on before going to these modules.

First, before we get down to business, a little quiz.  
Which is the oldest form of digital communications?

A. Teletype (RTTY)
B.  Packet
C.  Morse Code (CW)
D.  Amtor
E.  drums

If you said E. you are correct.  Drums have been used for communications by Native Americans, Africans, and Asians for thousands of years.  Next is Morse Code, then teletype.

Today's digital modes are far more complex than drums, CW, or even teletype.  To help you understand these modes better we have posted here a couple of files in PDF format.  They require Acrobate reader.  If you don't have Acrobate reader you can get it free (This will take you out of the MARS web site)

PDF files containing digital training
The first is an overview of digital modes and how they work.
Digital Modes I

Part II is a more indepth look at the use of digital modes.
Digital Modes II

Part III Discusses creating a message, transmitting keyboard to keyboard, and now includes WL2K

Digital Modes III

See additional info on WL2K

Note:  These files will take a few moments to download, depending on the speed or your internet connection.  The first and third are relatively small, but the second is over a MB and may take a little more time, depending on your internet connection speed.  Those with DSL, it should not take more than a minute or so.  I think you will find the files worth it.  Dave has put together some nice graphics and flow charts, and he explains things in a clear, easy to follow way.

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