Thanks for the good report. The same transmission is repeated today. And
tomorrow, a last time.
There was a decode at RC4HAA, even with good Eb/N0, but the message is
wrong!
Looks like their phase is not stable, the PPS pulse looks not as it
should. The sample rate is corrected but there is a high jitter. You can
see it on the Alpha trace. Anyway i think about a transmission on 8270
Hz with the other coil (700 mA), to try to leave a trace on their
spectrogram. If something appears, it could be convincing that it is
worth to put some more effort in the system by generating a clean
PPS+NMEA signal for SpecLab...
73, Stefan
Am 13.10.2017 00:36, schrieb Paul Nicholson:
Stefan wrote:
> f = 6470.100000 Hz
> Start time: 12.October.2017 06:00:00 UTC
> Symbol period: 180 s
> Characters: 1
> CRC bits: 0
> Coding 8K19A
A great signal in Todmorden, Eb/N0 = 15.9, phase -114.3.
Has the potential to go a long way! It actually decodes
correctly here after only 980 seconds of signal, about 5.5
symbols out of 192.
--
Paul Nicholson
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