Rick, We had previously used AMTOR FEC for net traffic. We tried BPSK MFSK as I remember, and probably some others. More recently also Olivia. MT-63 seldom fails even under noisy conditions. I can copy it on my mobile radio with laptop sitting on the seat with no wire connections at all....and my old Explorer generates considerable RF and road noise of it's own.
Under fair to good conditions we use 2000 Hz bandwidth (not a problem on MARS channels) which is about four times faster and more much more reliable than AMTOR. For broadcast messages our standard is 1000Hz bandwidth. When things get too bad for voice communication, 500 Hz will still generally get through. Bill KB4IJ ----- Original Message ----- From: kv9u To: digitalradio@yahoogroups.com Sent: Friday, April 06, 2007 7:59 AM Subject: Re: [digitalradio] Alabama MARS has changed to MT63 Bill, What other digital modes did you compare it to and why did you find MT-63 superior? 73, Rick, KV9U Bill Ayer wrote: > That's correct. Alabama Navy MARS for some years now, and many other > states both Army and Navy use MT-63 for net traffic. It is far > superior to any other method we've found. > > Bill > KB4IJ >
