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Post by Paul N6NXV on Feb 25, 2024 6:59:18 GMT
I'm seeing that occasionally my DX contact "misses" my first reply to their first return of my call. Happens maybe 20% of the time, but sometimes runs more often.
Signal strength doesn't seem to make any difference. I see it happen on reports from +10 to -17.
Usually its just annoying, but when it happens and the DX is using F/H, I get bumped to the naughty slot, and sometimes forgotten. Other times a busy DX op will be "respond to my first call or forget it", and then I get dropped and need to get back in line.
I'm running JTDX v2.2.159 on a Windows 11 PC into an ICOM IC-7300.
Is there something that I might be able to adjust to fix this?
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Post by Wolfgang OE1MWW on Feb 25, 2024 7:47:51 GMT
This can have several reasons, like: QRM on DX site, many stations calling, operator handling etc.
FT8 is not a predictable QSO machine - anything is possible ;-)
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Post by w9mdb on Feb 25, 2024 13:21:20 GMT
You didn't use Hound mode so you didn't get pulled down to the Fox slots.
That means QRM is quite likely to interfere with your QSO.
That's the whole point of Hound mode is to get you out of the pileup and increase the chances of a clear QSO.
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Post by Paul N6NXV on Feb 25, 2024 22:51:13 GMT
The example I posted is in a "normal band", so no F/H mode. It happens to me in both modes, except in Hound mode, when they miss my first reply, I get bumped 300Hz to await later responses. Mostly that works, but sometimes it doesn't.
I'll agree that QRM is the most probable cause, but it's still a bit annoying. QSB could explain it too, except that I get it with both >+10 and <-19 reports. It feels to me like my "first-response" is coming with an unexpected delay.
I see a similar effect when I get a call and "Enable-TX" a bit late (maybe a second or two) and, while my display looks like I sent the message, they didn't receive it and we go around again.
I've tried adjusting the setting for TX Delay (from default of 0.2sec, both upward and downward). Doesn't seem to affect this behavior.
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