Joe is it possible to fix tx2 in jt65 sends same message as tx1 example (shows tx2 UR0MC N8JX EN64 OOO but transmits UR0MC N8JX EN64) Tnx 73 Terry
On Thu, Nov 17, 2016 at 2:27 PM, Joe Taylor <[email protected]> wrote: > Hi all, > > Regular readers of this list will know there has been much recent > development work on the experimental mode QRA64. > > In the current code revision, r7322, QRA64 uses a wider spacing between > tones in its thrice-replicated Costas 7x7 sync pattern. Sync tones are > now transmitted at tone numbers {20 50 60 0 40 10 30} rather than the {2 > 5 6 0 4 1 3} pattern used up to r7297. This means that the old and new > sync patterns are incompatible. Henceforth, all tests with QRA64 should > be done using WSJT-X code revision 7322 or later for both Tx and Rx. > > QRA64 was designed especially for VHF-and-up use, especially over the > EME path. Submodes QRA64A-E are now supported and generally work well, > even on paths with considerable Doppler spread. If you choose to > experiment with QRA64 on the HF bands, please use submode A. On > higher-frequency bands, simulations and on-the-air measurements suggest > optimum choices of submodes roughly as follows: > > Doppler Submode Suggested EME bands > Spread > --------------------------------------- > 0 - 5 Hz A 50 - 432 MHz > 5 - 20 B 1296 MHz > 10 - 50 C 2.3 GHz > 20 - 100 D 3.4, 5.7 GHz > 50 - 200 E 10.3, 24 GHz > > On any and all bands, please report results of your experimentation here! > > Some algorithmic details are not yet optimized, either for sensitivity > or execution speed. You can reasonably expect further improvements to > the decoder in coming weeks. > > Please join me in again thanking Nico Palermo, IV3NWV, who designed the > basic codec for QRA64 -- including novel features for handling Doppler > spreads that may be even larger than the tone spacing. > > -- 73, Joe, K1JT > > ------------------------------------------------------------ > ------------------ > _______________________________________________ > wsjt-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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