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The advantage of USB mode over DIGI mode is the ability to control the power level. DIGI is my preferred mode but there are times when reduced power is useful.
Tony
AD0VC
From: [email protected] <[email protected]> on behalf of Stan Dye via groups.io <standye@...>
Sent: Sunday, March 23, 2025 12:41 AM To: [email protected] <[email protected]> Subject: Re: [QRPLabs] FT8 in USB mode - not working right? ?
I have also duplicated the problem in running FT8 in USB mode in WSJT-X.
After the first transmission of the automatic exchange, it won't transmit again.
?
My first note: FT8/FT4 will always work better in digi mode, so why are we trying this??
So a fix may be low priority, unless this also affects other WSJT-X modes that need SSB mode.
?
Anyway, I tried to diagnose it a bit, changing settings and VFOs used, etc.? I tried what I think is the least complicated settings, for radio control, i.e. setting both 'Mode' and 'Split Operation' to 'None', and setting mode manually and selecting VFO
A.? But the problem persists.? I turned on the QMX CAT log, and observed the commands sent to QMX, and I see the correct commands being issued, but on the 2nd cycle when the TX command is sent, for some reason QMX immediately reverts to RX mode (per its log).
This same action happens on successive cycles.? I have no idea why.
See annotated log excerpt below:
01:17:26 IF; IF00007074000 ? ? +00000000002000000 ; [This is from polling which I have set to 60sec] 01:17:26 FA; FA00007074000; ? ? ? ? ? ? ? ? ? ?? ?? [This is from polling which I have set to 60sec] 01:17:26 MD; MD2; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ?? [This is from polling which I have set to 60sec] 01:18:19 TX;??????????????????????????????????????? [Start of 1st TX cycle] 01:18:19 ID; ID020;???????????????????????????????? [it likes to send an ID cmd after TX] 01:18:19 TX ? ? ? ? ? ? ? ? ? ? ? ? ??????????????? [QMX internal log msg noting change to TX?] 01:18:26 IF; IF00007074000 ? ? +00000000012000000 ; [next Poll] 01:18:26 FA; FA00007074000;???????????????????????? [ "" ] 01:18:27 MD; MD2;?????????????????????????????????? [ "" ] 01:18:33 RX;??????????????????????????????????????? [to RX -> end of 1st 13 sec TX cycle] 01:18:33 RX???????????????????????????????????????? [QMX notes change to RX?] 01:18:50 TX;??????????????????????????????????????? [Start of 2nd TX cycle] 01:18:50 ID; ID020;???????????????????????????????? [it likes to send an ID cmd after TX] 01:18:50 TX ??????????????????????????????????????? [QMX notes change to TX?] 01:18:50 RX ??????????????????????????????????????? [QMX immediately shows change to RX! Why?] 01:19:03 RX;??????????????????????????????????????? [to RX -> end of 2nd 13 sec TX cycle] 01:19:20 TX;??????????????????????????????????????? [Start of 3rd TX cycle] 01:19:20 ID; ID020;???????????????????????????????? [it likes to send an ID cmd after TX] 01:19:20 TX ??????????????????????????????????????? [QMX notes change to TX?] 01:19:20 RX ??????????????????????????????????????? [QMX immediately shows change to RX! Why?] 01:19:26 IF; IF00007074000 ? ? +00000000002000000 ; [next Poll] 01:19:26 FA; FA00007074000;???????????????????????? [ "" ] 01:19:27 MD; MD2;?????????????????????????????????? [ "" ] 01:19:33 RX; ?????????????????????????????????????? [to RX -> end of 3rd 13 sec TX cycle] 01:19:39 RX; ?
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