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6869Re: [wsjtgroup] Working WSJT on HF

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  • Bill VanAlstyne W5WVO
    Jan 28, 2010
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      Thank you Joe! I appreciate the explanation of what is going on in there. Smile emoticon
      Bill W5WVO

      Sent: Thursday, January 28, 2010 12:56 PM
      Subject: Re: [wsjtgroup] Working WSJT on HF


      Hi Bill, Tip, and all,

      > "These adjustments [centering the signal
      > the receive passband using RIT and reducing
      > the Tolerance
      parameter] will help WSJT
      > decode received pings better and
      > your success."

      The FSK441 decoder always selects the "best" of many possible outcomes
      for the decoded message. By reducing the tolerance parameter you reduce
      the number of tested outcomes. With a marginal signal, a small
      tolerance setting means fewer competing "noise decodes" -- and therefore
      improved chances that the outcome found to be best will be the correctly
      decoded message.

      I agree with Tip that most circumstances allow one to "tag" a report
      sent to a particular station in a variety of ways, all of which can be
      valid and effective. If you keep in mind what information you're trying
      to convey, and what possible confusion you're trying to avoid, you won't
      go far wrong.

      -- 73, Joe, K1JT

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