QMX+ and DTR/RTS like CW keyering
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Hello dear all and devs,
Several hams on our side have equipped themselves with the QMX+.
Some would like to know if it would be possible to add a few lines of code to the firmware so that when PTT is triggered—either via CAT or through DTR/RTS emulation—and the QMX+ is in CW mode, it would transmit a carrier.
From our tests, this already works in Digi mode, where a tone is sent through the sound card emulation.
However, in CW mode, when PTT is sent via CAT, the radio does switch to transmit, but no signal is actually emitted.
It might work if the software sent a tone via the sound card, but most CW software assumes that PTT alone is sufficient.
This request is therefore aligned with improving compatibility with most CW-capable software (e.g., fldigi in CW mode with PTT via CAT or RTS/DTR).
One of the advantages of operating in CW with the QMX+ is also the ability to reduce receive bandwidth, onboard decoding, breakin etc.
We believe only a small firmware adjustment would be needed to have the carrier generated automatically, since the radio already enters transmit mode via CAT PTT.
Adding RTS/DTR handling would enable a simple and widespread configuration method for this kind of operation.
Otherwise, some have considered building interfaces using FT232 chips and optocouplers, but it would be unfortunate to require extra hardware when just a few lines of code might suffice.
Perhaps the addition of a CW submenu to automatically enable the carrier when PTT is activated?
Thank you in advance.
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