I did extensive experimentation with this and it's tricky to get the timing good enough with GPIO.
Like Gorkem says mic/line is a good option. You can connect an oscillator and just send a tone in, filter this and then just send it as "SSB" as a pure tone in SSB is just a carrier. You can also key a DC bias after the AC coupling and generate the tone on software. Good luck 73s Albin SM6WJM On Sat, Dec 28, 2019, 20:06 Gorkem Ozcelebi <gor...@gmail.com> wrote: > If I've understood your question correctly, how about the microphone / > audio input? If it's ac-coupled, you could use a simple oscillator. The > presence of the tone, gated by your morse key, triggers the cw. If you > don't want to build / provide an external oscillator, how about a software > oscillator fed through one of the audio output channels of the same PC, > going back in thru your morse key. The other audio channel is left > available for the audio output of your receiver. > > Gorkem > > On Sat, Dec 28, 2019, 7:25 PM Harald Fritzsche (DD0VS) <dd...@dd0vs.de> > wrote: > >> Hello All, >> >> Hoping that amateur radio is not to far away from common use of >> Gnuradio mailing list, but amateur radio is making me looking to GR >> since 2001. >> There is a plan to use a Gnuradio based transceiver for µ-wave >> contesting, as it has been shown by W7FU or KB1VC (SoDaRadio) or DL9SW. >> A needed condition is, to key HF with morse code using a straigth or >> simple morse key. >> >> Doing this with just looking to the status of /dev/ttyUSB0-CTS pin is >> not sufficient, basically some of the keyed code is somehow swalloed. >> Neither with python code or with a C++ OOT module i got it solved. >> >> How to get this solved? (Hardware keying or modulated cw is not a real >> option). >> >> Regards and vy73 >> Harald >> DD0VS >> >>
