Hello Rik and Simon, The block size (which is interleaved and scrambled) is equal to 64 symbols in Olivia and 32 in Contestia. Consequently, Contestia can't be as good as Olivia relatively to interferences (for the same symbol speed).
Olivia has 7 bits characters, Contestia 6 and RTTYM 5 (with a double set of characters as in RTTY, so with the same problem of non-desired set of characters switching). 73 Patrick ----- Original Message ----- From: "Rik van Riel" <r...@surriel.com> To: <digitalradio@yahoogroups.com> Sent: Saturday, August 08, 2009 8:21 PM Subject: Re: [digitalradio] Olivia - Contestia Tone / Bandwidth Configuration > Patrick Lindecker wrote: > >> As a thumb rule: >> For a same sub mode: Contestia has a double speed (+3 dB) but only 1.5 >> dB of loss in term of minimum S/N compared to Olivia. So it seems to be >> a better compromise. > > Assuming that the S/N is constant. In practice the > S/N seems to vary wildly from second to second, with > all kinds of interference popping up and disappearing > again. > > Does Contestia deal with those as well as Olivia does? > > -- > All rights reversed. > > > ------------------------------------ > > Announce your digital presence via our Interactive Sked Pages at > http://www.obriensweb.com/sked > > Recommended digital mode software: Winwarbler, FLDIGI, DM780, or Multipsk > Logging Software: DXKeeper or Ham Radio Deluxe. > > > > Yahoo! Groups Links > > > > >
