Hi Tony, Too bad you did not also run MT-63 at all three modes for comparison. I can tell you that next to the various 75bps Robust mode on the MIL-STD-188-110/STANAG modem, its very robust. However under such conditions nothing but an ARQ protocol will really suffice.
/s/ Steve, N2CKH At 12:31 AM 10/27/2007, you wrote: >All, > >For what it's worth, I ran several digital modes through a high-latitude >ionospheric path simulator and recorded the results. The signal spread >was set to 30Hz and path delay was 7 milliseconds. With these settings, >the audio sounds much llike the most extreme polar path distortion and >the simulator did a real number on throughput. > >Signal-to-noise (AWGN) was set at a threashold that allowed the most >robust mode to print at 90 percent. In this case, that mode was Olivia >1000/32. Although far from conclusive, mode performance seemed to >compare well with on-air experience under the most disturbed conditions. > >See below... > >Tony K2MO > >________________________________________________________________ > >OLIVIA 1000HZ / 32 TONE > >THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG >THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG >THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG >THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG > >OLIVIA 500HZ / 16 TONE > >THE QUICK BROWN FO6 JUMPS OVE< THE LAZY DOG >THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG >THE QUIMK LROWN FOX JUMPS OVEn THE LAZY DOG >QHA QUICK BROWN FOp JUMPS OVER THE LAZY DOG > >OLIVIA 500HZ / 8 TONE > >THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG >THE QUICKRhWN ~ JUMPS OVER jELAZY UOG >THKUICK BROWN FOi JUMPS OVER THE cAZv >THF7yICK BROWN FO_ J$9=SGOVER THE LAZY DOG > >CONTESTIA 1000HZ / 32 TONE > >/THE QUICK BAOWN FOX J+M*S ,VER THE & ZJFDOG >$H 4.ICK B8OWN FOX JUMPS <BE( T6EBL%GGN-H+2$ >5E QUIY<:A,OWN FONMATSR THE LAZY DOG >THE QUICK BROWN FOX J(LPS OVE0 TLE LAZY DOG > >CONTESTIA 500HZ / 16 TONE > >THE QUICK BROWN FOX JUMPS OV&U THE LXZ_ DJG >TME QUI/K BRON FOX JUM?S OVERTHE LAZY DOQ >TH' QUGCK BROWN G-C?JU/PS,OVFL5LE L"Z DOG >THE QUIKK BQOWN:#OX JUM!S OVERXTHE LAZT D5G > >CONTESTIA 500HZ / 8 TONE > >THE QUICK BROWN F#- T65IIRLI4L DJ! DO64I)(+ >QUICK</YWWN =(M&6Z/B )(!ZQETHE LA^.#TH5XWU: >CAH23DOX^6XMK-_,[EMAIL PROTECTED]" ,J<^' >OWN'C!5TWNTQV0GRSM9OT > >MFSK-16 > >u ÊICK BÀêe òt*ePÒct if'cÃlPøh vci]pdgeldt >N¢án i!i - ís=te.aOaÍC=iòYÃHE LAZY eeAxn1E >^Àn±uQ1yaPitvén iafDel²ePS uh ueo ^um P > >RTTY 170HZ SHIFT / 45 BAUD > >WAHXQAICC VBU IDGTX KMLDJLUDUSTHE KLARFBJMY >YHJNJ VBBBDQMBMPZX DFHPYU YLNKXK YHVEQQCPZWP >OGTYD QPPWX!99 8!=9 YLDACVRDJFDDJ6!5),?''? > >PSK-31 > > i R ® n waeaoo o- oeo yietotreo ieP >goe },iitE,ã re o $ree" o l i osehest >e n_ I t dvee ruiTa e do e ro D e r >e_n- § 3e o ti e- } dohItQ s-e ty >eottor eo1keo ele roetahe eeÀiefA seg > > > > > > > >Announce your digital presence via our Interactive Sked Page at >http://www.obriensweb.com/drsked/drsked.php > >Yahoo! Groups Links > > >
