Thank you for your answer Bill, That's all clear for me. We will try jt9 fast mode. My 73, David, F4HTQ.
-----Message d'origine----- De : Bill Somerville [mailto:[email protected]] Envoyé : samedi 22 septembre 2018 14:02 À : [email protected] Objet : Re: [wsjt-devel] Tone spacing On 22/09/2018 11:13, David Alloza wrote: > I saw that it was possible to use a "tone spacing" * 4, could it help to decode a signal that would have suffered from Doppler? > How to decode this signal in reception? Does WSJT-X do the inverse conversion in RX mode? > 73, > David, F4HTQ. Hi David, the tone spacing adjustment is only on transmit and is designed to accommodate transmitters that divide the modulated RF to make the transmitted signal, usually to make transmissions on the lower LF bands. They would normally use hetrodyne mixing to up-convert before the IF receiver so no tone spacing adjustment is needed there. Have you considered experimenting with one of the JT9 fast modes or even MSK144 if you want a block encoded mode like FT8 or even ISCAT for a stream encoded mode that can work well with complex and variable propagation paths like aircraft scatter. 73 Bill G4WJS. _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
