I would recommend Fldigi software for digital modes: http://www.w1hkj.com/Fldigi.html
It seems very strange that you can decode ok using USB or AFSK-A, but have problems with DATA-A mode. Do you observe any differences on the waterfall between these modes? 73, Matt VK2RQ On 12/06/2013, at 2:02 AM, "IZ4MJP.com" <[email protected]> wrote: > 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
