Stefan wrote: Getting good readings from the excellent signal. So far we have, S/N in 92.6 uHz and absolute phase 20:00 to 23:00 19.6 dB +14.5 deg 0.25 fT 23:00 to 02:00 14.5 dB -3.2 deg 0.22 fT
On 20/04/2017 10:02, DK7FC wrote: Last night i run another message: f = 6470.100000 Hz Start time: 19.Apr.2017 19:00:00 UTC Symbol period: 30 s Characters: 2 CRC bits: 20 Coding 16K21A Duration:
Hi Alex and Eddie, Unfortunately the messages are not correct. With just 2 characters it is hard to decide if the message makes sense. We seem to be very close (beyond) the limit. But hey we are far
Received the 20170422 6470.1Hz transmission (message sent off-list to Stefan for confirmation). prep [ 0 0 0 0 0] found rank 0 ber 4.0039e-01 Eb/N0 4.6 M -1.306843281e+00 [xx] ps [ 0 0 0 0 0] carrier
Hi Stefan No decode here, not even false ones. 73 Eddie G3ZJO On 21/04/2017 23:53, DK7FC wrote: I should try a long transmission of a short message during daytime: f = 6470.100000 Hz Start time: 22.A
Hello Eddie, Which list size did you choose? With CRC 32 you can use 2000000 and more, as much as possible with your PC. Jacek, i confirm, the message is correct... 73, Stefan Am 22.04.2017 23:41, sc
Hi VLF, another chance, the same msssage two hours earlier, improved timing towards the east... f = 6470.100000 Hz Start time: 23.Apr.2017 05:00:00 UTC Symbol period: 40 s Characters: 2 CRC bits: 3
Hi Stefan I tried 20K and 200K. Now tried 2M, still the same, nothing. It seems we may be at the limits of signal on 6470 given the ERP, QRN, QRM etc. Always ready for another challenge, I tried the
Hi Stefan, I tried to receive your message on both days, and even added the two recordings with equal weight, but unfortunately no decode. Guess I need a railway strike :-( Unfortunately no luck from
carrier Eb/N0: 17.7 dB carrier S/N: 28.32 dB in 24.4 uHz carrier phase: 67.2 degrees carrier Eb/N0: 17.6 dB carrier S/N: 28.17 dB in 24.4 uHz carrier phase: 63.4 degrees Excellent repeatability of th
Hello Markus, Eddie, Paul, Thanks for the feedback, for trying and for the results. Very strange. Paul has excellent results (as usual) but no decode for Eddie. On 8270 Hz, the 'difference' is much l
Hello Paul, A new week where we can push the limits! :-) Well, let's try that: f = 6470.100000 Hz Start time: 25.Apr.2017 06:00:03.20 Symbol period: 4.3 s Characters: 100 CRC bits: 8 Coding 16K21A
Update: f = 6470.100000 Hz Start time: 25.Apr.2017 06:00:00 Symbol period: 4 s Characters: 100 CRC bits: 8 Coding 16K21A Duration: 11h, 09m, 52s Antenna current: 460 mA SpecLab can run the periodic
Paul receives anything (as usual). But the strange thing is that i can receive the 6470Hz signal with a mediocre setup (suboptimal antenna, qrm location in the center of Warsaw) at 900km, while Eddie
Too bad the explanation is so simple, this nice fuel for wierd propagation theories :) BTW in Poland we have 3kV DC for railways, so almost no harmonics. VY 73 Jacek / SQ5BPF Hi Jacek, in my case, th
Something went wrong, the PSK stopped at 15:40 UTC. That's just 86.6% of the total time, -0.63 dB. The symbol rate is correct. The txt file contains 10048 symbols, which is correct. There are no sche
Hi Jacek / VLF The only other explanation (apart from lower qrm levels) might be the software used. QRM. Stefan suggested running a 366mHz spectrogram at 6470 Hz, see http://www.g3zjo.talktalk.net/vl
