You can find a full description of the JT65 protocol and how its
decoders work in my article in QEX for August-September 2005. A link to
the article can be found on the WSJT "Documentation" page:
Answers to your
question will be found in sections 9 to 13 of the article.
In short: at signal strengths around -24 dB and higher, a fully general
Reed Solomon decoder will decode any message correctly. The "Deep
search" decoder can go about 4 dB deeper into the noise, but it only has
time to look for messages that have "My Call" or "CQ" in the first
-- 73, Joe, K1JT
> I tried to swap wav files with a friend to compare results and just
> hear each others qsos. He found the only way for him to decode
> someone else's jt65 file is to put his own call in the default
> (options) and set up wsjt with the standard messages set to the call
> of the other station on the wav file. I tried this and found he is
> correct. If you don't adjust those calls you can't decode the file.
> We are both using the latest version of wsjt. Is there anyone that
> can explain this odd (to me) behavior?