I have tested THOR22 extensively with PSKmail the past weeks, comparing it to PSK250. It has shown that when PSK250 does not work anymore THOR22 is an excellent replacement. The idea is that when the channel goes so bad that arq with PSK250 slows down to a factor of 4 (PSK63 speed) it is better to use THOR22. A slowdown of 4x is reached when on average 50% of the blocks in a frame of 8 are damaged.
In practical use on 80 meters NVIS and 30 meters long range (2000 km) the power factor is 8x. I.e. 40 Watts PSK250 = 5 Watts THOR22. Especially when selective QSB hits on 80 meters THOR22 is a winner. On a mediocre channel there is no speed penalty as the arq with PSK250 will slow down tremendously, and THOR22 has the added benefit of being qrm-hardened. As a result of these tests we have some servers (PI4TUE, DA5UWG, SM0RWO) running in dual mode (PSK250/THOR22) see the wiki for schedules.... 73, Rein PA0R > -----Ursprüngliche Nachricht----- > Von: "Tony" <[EMAIL PROTECTED]> > Gesendet: 13.10.08 22:42:25 > An: digitalradio@yahoogroups.com > Betreff: Re: [digitalradio] THOR robustness or lack of thereof > Rick, > > > On other thing that I can not understand is why THOR's performance > > proved to be so poor on Tony's tests. > > Dave points out that this could be a sample rate problem. Fldigi did > just > fine with other modes during the HF path simulations so the question > is > whether the sampling issue is unique to Thor or is the mode simply > less > tolerable to signal spread as the path simulator indicates. > > Tony, K2MO -- http://pa0r.blogspirit.com ------------------------------------ Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked 30M digital activity at http://www.projectsandparts.com/30m Recommended software : DM780, Multipsk, FLDIGI, Winwarbler ,MMVARI. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
