Leigh L Klotz, Jr. wrote: > I think MARS adopted it so it has some momentum there. Are they still > using it?
Increasingly so. Since most traffic is pre-prepared the fact that keyboard interactive has some lag isn't considered a big deal. The region six AF digital net is pretty much an all MT63 show, and word has it that it's increasingly the most common mode on the Navy side as well. It's starting to leak onto TRANSCON, so there's no doubt that acceptance is spreading. Comparing modes is always a bit dodgy thanks to the affects of environmental conditions, but a fellow MARS operator did a comparison of MT63 vs. various Olivia submodes a while back using a short but still valid EEI message. His findings for said message: MT63 1kHz: 1 min 10 sec MT63 2kHz: 37 seconds Olivia, 32 tone, 1kHz: 4 min, 1 sec Contestia 4 tone, 500Hz: 1 min 14 sec Contestia 8 tone, 1kHz: 50 sec Contestia 4 tone 1kHz: 31 sec Contestia 8 tone 2kHz: 25 sec Contestia 4 tone 2kHz: 19 sec RttyM 8 tone 2kHz: 13 sec RttyM 4 tone 2kHz: 10 sec Naturally S/N degrades for reduced block size. MT63 isn't too bad with -8dB S/N minimum, and Contestia 8 tones, 1kHz isn't a slouch, either. One of these days we'll get around to observing how these things work under differing conditions and as they degrade, but it hasn't percolated to the top of the to-do list yet. -- Chris Kennedy [EMAIL PROTECTED] AF6AP http://www.mainecoon.com PGP KeyID 108DAB97 PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97 "Mr. McKittrick, after careful consideration..."
