Mike, It decoded fine here on my RSPdx SDR ------ 2024-07-19 - 22:24:30 UTC - 15m - FT8
215130 13 0.1 748 ~ N1QV KH7Z RR73 215130 13 0.1 748 ~ NN7SS KH7Z RR73 215130 13 0.1 748 ~ PA2LO KH7Z RR73 215130 13 0.1 748 ~ W2ZQ KH7Z RR73 215130 13 0.1 748 ~ PB8DX KH7Z RR73 215130 13 0.1 748 ~ K9AN KH7Z -08 215130 13 0.1 748 ~ KY7M KH7Z -07 Hasan On Fri, Jul 19, 2024 at 4:55 PM Black Michael via wsjt-devel < wsjt-devel@lists.sourceforge.net> wrote: > I used this WAV file > > > https://www.dropbox.com/scl/fi/stohwy3veidevmwr4j517/240605_181330.wav?rlkey=85h1c9riskq1mmbqzex9hpov3&dl=1 > > And then used Audacity to add white noise. > Was able to add .45 noise and decoded at -16dB. At .46 noise it did not > decode. > > .45 noise > https://www.dropbox.com/scl/fi/xu633odix84cv1mkvki89/240719_213430.wav?rlkey=nvzw4a77eaockxre0c8rz23ck&dl=1 > .46 noise > https://www.dropbox.com/scl/fi/n4v1c611ft9r0mmtilty3/240719_213400.wav?rlkey=56v6ej5efeys7xees39jpn28d&dl=1 > > On the way to this noise level the K8R verified stopped pretty early or > was overly sensitive to the DT time since I'm having to key Audacity at the > 30-second mark manually. > > Here's a strong 13dB but the K8R verified does not decode. > > https://www.dropbox.com/scl/fi/ylm4qc888mtphmkmx75ui/240719_215130.wav?rlkey=16zxroz2yvtz0cgun2ix4kdbm&dl=1 > > Mike W9MDB > > Mike W9MDB > > > > > > > > > > > > > > On Friday, July 19, 2024 at 03:29:06 PM CDT, Joe Taylor via wsjt-devel < > wsjt-devel@lists.sourceforge.net> wrote: > > > > > > On 7/19/2024 3:51 PM, Andy Durbin K3WYC via wsjt-devel wrote: > > I'm decoding K8R at -9 for all stations in the decode but, on wide > > graph, only the sync tone is visible (barely visible). The relationship > > between visible signal strength and reported S/N seems to be very > > different from baseline FT8 or previous F/H. > > > > Is that normal and expected or are the reports optimistic? > > Reported SNR in all WSJT-X modes is the ratio of received signal power > to noise power in 2500 Hz bandwidth, expressed in dB. > > The FT8 signal is spread over 50 Hz, while the SuperFox signal is spread > over 1512 Hz -- 30 times wider. With equal signal strengths, of course > it's easier to see the narrow FT8 signal on the waterfall. > > -- 73, Joe, K1JT > > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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