Hi Mike - > I wonder it the AP bit patterns in ft8b.f90 could be double-checked? I > couldn't quite figure out how to check these myself.
You can check them yourself using ft8sim: $ ./ft8sim "W9MDB K9AN RRR" s 1500 0.0 0.1 1.0 1 -20 Generating single signal at 1500 Hz. f0: 1500.000 DT: 0.00 TxT: 12.6 SNR: -20.0 BW:50.0 W9MDB K9AN RRR 1111100101110101011000011001 1111011100110010101010101100 0111111011001111 000 011011000110 1 0.00 1500.00 -20.0 000000_000001.wav The first line of bits contains the two 28-bit callsign fields: 1111100101110101011000011001 1111011100110010101010101100 The second line of bits is the 16 bit report field. In this example, the report field contains the message bits that represent “RRR” message: 0111111011001111 The third line of bits are the “extra” 3 bits (all zeros in this example): 000 The 4th line is the 12-bit CRC: 011011000110 Of course, you can examine ft8sim.f90 for details. Please do let me know if you find any errors. Another good way to test is to generate a batch of wav files containing a message like “W9MDB K9AN RRR” at various SNRs from, say, -20 to -23 dB. Then decode them with AP turned on and off. To see the effect of AP, the state machine has to be in the appropriate state (you can click on Tx buttons to set the state) and Dx Call has to contain the right callsign (K9AN for the example message that I gave). Steve k9an > On Oct 30, 2017, at 10:29 AM, Black Michael via wsjt-devel > <[email protected]> wrote: > > I seem to have a lot of instances the the RRR/73 exchange having to be > repeated a bit too much. > I do have AP enabled. > > I wonder it the AP bit patterns in ft8b.f90 could be double-checked? I > couldn't quite figure out how to check these myself. > > data icos7/2,5,6,0,4,1,3/ > data mcq/1,1,1,1,1,0,1,0,0,0,0,0,1,0,0,0,0,0,1,1,0,0,0,1,1,0,0,1/ > data mrrr/0,1,1,1,1,1,1,0,1,1,0,0,1,1,1,1/ > data m73/0,1,1,1,1,1,1,0,1,1,0,1,0,0,0,0/ > data mde/1,1,1,1,1,1,1,1,0,1,1,0,0,1,0,0,0,0,0,1,1,1,0,1,0,0,0,1/ > data mrr73/0,0,0,0,0,0,1,0,0,0,0,1,0,1,0,1/ > > de Mike W9MDB > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! > http://sdm.link/slashdot_______________________________________________ > wsjt-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
