14073 contestia 500-16 928 rx tx calling lu2vc
2009/8/8 Patrick Lindecker <f6...@free.fr>: > > > 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 >> >> >> >> >> > >
