Joe, I think there is an issue with the JT9 auto sequencer as it has a tendency to change the DX Call and messages if more than one decode is received. I have on occasion seen some messages jumped but as I plan to look at the auto sequencer in detail did not document the situation closely.
Great news on JTMSK, I am looking forward to trying it. 73 de Bill ND0B -----Original Message----- From: Joe Taylor Sent: Friday, August 21, 2015 8:19 PM To: Bill Ockert - ND0B ; WSJT software development Subject: Auto-Sequencing with fast JT9 modes Hi all, This message is especially for Bill/ND0B, because he designed the auto-sequencing option in WSJT10. But it's also for anyone who has been exercising the fast JT9 modes. Are you happy with the way the current auto-sequencer takes one through a QSO? Any suggestions for making it better? The fast JT9 modes are designed for meteor and ionospheric scatter on 6 meters. They also work well on 10 m, and perhaps on 4 m. But they're not very useful at 144 MHz and above, because they require minimum ping durations around 400 ms. in the last ten days I've been working on a new mode tentatively called JTMSK. It uses 2-tone "minimum shift keying" (MSK) at 2000 baud, and it's aimed at situations where signal enhancements (e.g., from weak, underdense meteor pings) are too short to be decodable in JT9H. There's no JTMSK decoder in WSJT-X, as yet, but a stand-alone command-line decoder is now working well on recorded pings copied over the air. Sensitivity is about the same as FSK441, and pings can be as short as 100 ms. JTMSK has strong forward error correction, so you get perfect decodes with no on-screen garbage. I'm busy now with some necessary optimizations of the decoder. If all goes well with that effort, JTMSK might be available for testing by others in a week or so. -- 73, Joe, K1JT ------------------------------------------------------------------------------ _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
