Cortland, I would imagine the mode works well for passing MARS traffic. Contestia seems to have about the same wpm rate in the 8 tone / 1k configuration and throughput seems to be better. There's no latency either so it might be worth a try.
Not much use for wide high-speed chat modes on the ham bands, especially since most of us can't type that fast ; ). They are fun to experiment with though. Tony -K2MO ----- Original Message ----- From: "Cortland Richmond" <k...@earthlink.net> To: <digitalradio@yahoogroups.com> Sent: Monday, March 23, 2009 7:22 PM Subject: RE: [digitalradio] MT63 Operating Tips > Hi, Tony! > > > I use MT-63 on the Military Affilaite Radio System (MARS). Any of these > widebandwidth modes will add up to more peak power than the average > reading. I can run a *fair* amount of ALC, but I set the input by looking > at the peaks on a 'scope hooked up to a directional coupler. Surplus or > e-Bay scopes are cheap enough now that this may be a no-brainer for > digital operators any more. > > Some modes are more sensitive to phase distortion than MT-63 too, and > others, less. Either way,these modes require keeping the signal free of > intermod, compression and flat-topping. One of the old AFSK RTTY tricks, > and still a good idea, is to use high audio tones to suppress audio > harmonics. > > Don't forget to set the actual sound card sampling frequency into whatever > software used. > > Have fun! > > Cortland Richmond > KA5S > > > ----- Original Message ----- > From: Tony > To: digitalradio@yahoogroups.com > Sent: 3/23/2009 4:31:02 PM > Subject: [digitalradio] MT63 Operating Tips > > > All, > > Had several QSO's with first-time MT63 OPs this week. Some had a > difficulty getting used to the software settings so I thought I'd pass > along a few tips. > > Peak Power: > > Peak power will be substantially higher than the average with this mode so > it's best to use the software's tune feature to set the transmitters > output. The most common mistake is setting the RF output power with the > MT63 signal itself. This can cause distortion / throughput issues. A > typical peak setting of 25 watts will show about 5 watts average on your > rigs meter. > > Software: > > Fldigi, MultiPSK and Mixw all work well. Nino Porcino's MT63 Terminal has > signal report and tune features that are useful for the beginner. It also > has a couple of nifty "analog" gauges that measure confidence and SNR. It > works well and is easy to setup. Use the asterisk * in the transmit buffer > to allow the type-ahead feature. > > See http://xoomer.virgilio.it/aporcino/MT63/index.htm > > ... >
