Q65 mode guide for DXers

[VK4ADC]

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Okay major update to how you should set up your Q65 in WSJT-X, please set your 'Ftol' value to a really LOW value like 20 Hz and you will find the ability to get decodes from multiple signals in one period is magically back to where it should be.

My original document had a recommendation to set Ftol to be a large number (1,000Hz) and that is I now understand the WRONG thing to do..

if you want a TEST file to decode, please feel free to download this file: Q65-30A test file

if successful you will see these three decodes:

224100  -7  0.3 1173 :  CQ OC W4TAA EL87  q0
224100 -11  0.2 1520 :  CQ AC4TO EM70      q0
224100 -17  0.2 2510 :  CQ KD5M EM60      q0

If you stretch you Ftol to cover more than one signal you will break the multi signal decodes... its sort of the opposite of what we did for setting up JT65..  you live and learn.

Peter

I grabbed your test file and played with a few settings in Q65 mode.  I had followed your doc and set FTol at 1000, but saw 4 sigs a day or so ago and decoded none of them.  However just a single signal was decoded when received later.  FTol now set back at 20Hz.

I also tried the Decode settings using that file to find that Fast is correct (as per your doc), Normal is ALMOST tolerable, Deep is so slow as to be intolerable. The decodes take so long that you would miss alternate transmission cycles, but it probably would not be obvious as to why.

Thanks for making that file available, much appreciated. Playing with settings while using it is well worthwhile.

Doug