Re: [digitalradio] MT63 Operating Tips
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" To: 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 > > ... >
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 ...
Re: [digitalradio] MT63 Operating Tips
I use a PEP output meter and back off power a little to avoid clipping. I think that works too for people that know their way around. 73, Jose, CO2JA --- Tony escribió: > 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 > > > Reception: > > Use the markers in the waterfall and keep the signal centered between > them. Nino's MT63 software has a two-tone transmit marker that helps > the other party tune your signal. It shows the receiving station where > the top and bottom edge of the MT63 signal is. This feature is > especially helpful when signals are weak. > > Fast Chat Mode: > > It will take some getting used to MT631K if your typing is slow; it's > best to use the type-ahead buffer to keep things rolling along. The 1K > mode does 100 wpm so text files can be sent at a fair pace. The > cut-and-paste works well for sending emails and other small files. > > The mode resists QRM / QRN very well and will usually print with a > fair chunk of the signal overlapped by another MT63 signal. Use common > sense when running a wide mode like MT63. Listen carefully to make > sure your not causing interference. The 1K, long interleave mode gives > the best bang-for-the-buck. > > Tony -K2MO > > > > > VI Conferencia Internacional de Energía Renovable, Ahorro de Energía y Educación Energética 9 - 12 de Junio 2009, Palacio de las Convenciones ...Por una cultura energética sustentable www.ciercuba.com
[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 Reception: Use the markers in the waterfall and keep the signal centered between them. Nino's MT63 software has a two-tone transmit marker that helps the other party tune your signal. It shows the receiving station where the top and bottom edge of the MT63 signal is. This feature is especially helpful when signals are weak. Fast Chat Mode: It will take some getting used to MT631K if your typing is slow; it's best to use the type-ahead buffer to keep things rolling along. The 1K mode does 100 wpm so text files can be sent at a fair pace. The cut-and-paste works well for sending emails and other small files. The mode resists QRM / QRN very well and will usually print with a fair chunk of the signal overlapped by another MT63 signal. Use common sense when running a wide mode like MT63. Listen carefully to make sure your not causing interference. The 1K, long interleave mode gives the best bang-for-the-buck. Tony -K2MO
