Kennth - - Best advice is point you to at least 2 good sites on setting
up and operating JT44 (and FSK441).
Read the info Tip (WA5UFH) and Eric (WB5APH) have to offer.
Tip's site is at http://www.qsl.net/wa5ufh/
and Eric's is at
Main key to JT44 sucess I have seen is accurate PC clock timing - both
in terms of absolute and relative. If timing varies from one TX/REC
sequence to another, the program has a hard time getting steady synch
signal and the decode will be off and averaging will not know what DT to
try and lock on. One of the better PC "clock tammer" programs is
Dimension 4 or "D4" for short. See http://www.thinkman.com/dimension4/
for free download (link from Eric's site as well) There are GPS clock
alternatives as well. see K1SIX site at
Wish we had some F2 openings to try JT44 mode on this year.
Bruce, KD5IUG in EM42