John, > Hey man you are preaching to the choir!!!
It seems that way om -- first QSO was yesterday so it's all new to me. > ALE400 is a great mode, even at higher latitudes such as I am. Simulator seems to indicate that John. Not as robust as other mfsk modes, but beats the pants off of 300 baud HF Packet!!! Are you available for a contact? I'm on 14073.0 USB + 1000Hz. ALE-400 Tony -K2MO ----- Original Message ----- From: "John Bradley" <jbrad...@sasktel.net> To: <digitalradio@yahoogroups.com> Sent: Tuesday, May 26, 2009 11:32 PM Subject: RE: [digitalradio] ALE-400 > Hey man you are preaching to the choir!!! ALE400 is a great mode, even at > higher latitudes such as I am. > > > > Now if we can only convince people to give it a try. .... > > > > John > > VE5MU > > > > From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On > Behalf Of Tony > Sent: Tuesday, May 26, 2009 4:37 PM > To: digitalradio@yahoogroups.com > Subject: [digitalradio] ALE-400 > > > > > > > > > All, > > > > Had a chance to see ALE-400 in action for the first time thanks to K7TMG. I > was very pleased to see how sensitive the mode was and how well balanced it > is between bandwidth and throughput. > > > > I did test ALE-400 with a path simulator a while back and sensitivity was > very good. It seemed to be robust with moderate path distortion and showed > partial decode with heavy distortion (see below). > > > > I'm not a fan of ALE because of the interference issues. But as an ARQ chat > mode, ALE-400 seems to have little competition in the sound card class of > modes. > > > > Those involved with digital ECOMM might want to take a hard look at this > one. Patrick as done a terrific job with BBS, email, messaging and a bunch > more Bells and Whistles. > > > > Tony -K2MO > > > > > > ARQ Modes > > Minimum SNR > > (Direct Path no Ionospheric distortion) > > PAX (UNPROTO)...................-11db > > ALE400 (UNPROTO).................-8db > > PAX2 (Unproto)...................-7db > > HF Packet (300 baud Unproto).....+1db > > > > _______________________________________________ > > Ionospheric Simulations > > Throughput SNR = complete Pangram decode > > *Indicates partial decode > > Partial decode criteria: => 50% > > > > Simulation: High Latitude Moderate > > Path delay: 3ms > > Frequency spread: 10Hz > > Mode Throughput > > ALE400 (Unproto).............-1db / -6db* > > PAX (Unproto)................-4db / -10db* > > PAX2 (Unproto)...............+2db / 0db* > > HF Packet (Unproto 300bd)......NO DECODE > > *Partial decode > > ___________________________________________________ > > > > Simulation: High Latitude Disturbed > > Path delay: 7ms > > Frequency spread: 30Hz > > > > ALE400 (Unproto)......Incomplete / +2db* > > PAX (Unproto)..................NO DECODE > > PAX2 (Unproto).................NO DECODE > > HF Packet (Unproto 300bd)......NO DECODE > > > > > > > >
