Hello Mat. Many thanks for the answer. I've already tried with RTTY-R but with no luck. In USB Mode or ASFK A no problem at all with the same settings.
I'll give a try using MMTTY (maybe MixW 3.xx doesn't love DATA-A, hi hi). 73 Franco, IZ4MJP Il giorno 11/giu/2013, alle ore 13:42, Matt VK2RQ <[email protected]> ha scritto: > Use DATA-A mode. > > Normally DATA-A modfe defaults to upper sideband, whereas the convention for > RTTY seems to be lower sideband. This means that the RTTY signals wil lappear > "inverted" and this may explain why you have problems to decode the RTTY. > > The best solution is to select RTTY-reverse in your RTTY program, so that the > software will know to invert the signal as it decodes it. Otherwise, it is > possible to put the KX3 in DATA-A REV mode in order to invert the signal, but > this may cause you problems later if you try to decode other asymetric > digital signals (such as MFSK). > > AFSK-A mode is designed to by used only with RTTY, and uses the KX3 to do > narrow DSP filtering, as you have seen. If you want a wider bandwidth, use > DATA-A mode, and let your digital mode software do any required DSP filtering > itself. > > In general, USB mode should not be used for digital modes at all (of course > it can be made to work, with some caveats like those you already mentioned, > but it's generally best to steer clear of it). > > 73, Matt VK2RQ > > On 11/06/2013, at 9:12 PM, "IZ4MJP.com" <[email protected]> wrote: > >> Hi, >> i own a KX3 since June 2012 (one of the first arrived in Italy) . >> I mainly use my KX3 in Phone and CW modes. >> >> Some weeks ago i've bought a SignaLink USB II interface + KX3 cables. >> >> After the initial setup all worked fine in PSK31 and RTTY but i have some >> doubts about the right Mode to use: USB, AFSK A or DATA A >> >> With AFSK A mode the bandwith is too narrow (the waterfall of MixW shows >> only 300 Hz more/less) so is usefull only when i've centered the RTTY signal >> of the correspondance. >> Not usefull during normal DX operation (IMHO). >> >> Data A is also OK but i can't decode RTTY (only PSKxx modes). In this Mode i >> could narrow the BW but there is no way to decode RTTY correctly. >> >> USB is the Mode i currently use with RTTY but i think is not the right Mode >> for digital communication (i have to manually disable compression and TX Eq. >> every time and setup ALC levels). >> >> I've read and re-read the user manual at Page 18 but i not understand why i >> can't decode RTTY. >> >> So please can someone help me to resolve the problem? >> >> Another question: is there a way to widen the BandWith in AFSK-A Mode ? (my >> display show 0,50 Max). >> >> My KX3 is equipped of the roofing filters. >> >> Many thanks for any help. >> >> 73 >> Franco, IZ4MJP >> >> >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
