OK, a new transmission at 130 mA on 8.27 kHz.
f = 8270.1 Hz
Start time: 01.05.2016 15:00:02 UTC
Period: 200 s
Length: 5
CRC 16
Coding 8K19A
Duration: 28h, 26m, 40s
73, Stefan
Am 01.05.2016 16:33, schrieb DK7FC:
RR,
OK!
Do we know enough about the phase behaviour on 8.27 kHz, so we know
where we are starting from?
For ULF we would need longer symbol periods, that's sure. So it could
be interesting first to try 200s periods and a shorter message. 5
characters should be a goal, suitable for a few callsigns of active
amateur radio stations :-)
5 characters at 200s symbols, that's 28 hours and 26 minutes and 40
seconds.
I will start a transmission at that rate (this time without SL
restarting after 24 hours) and at 6 dB lower power (because of the
beeeeeeep during the working day tomorrow). 6 dB less (abt 125 mA)
should be no problem at that rate.
A first pre-test.
The cavity resonances are the frequencies seen as a horizontal (diurnal
frequency variation) line in this capture from last year:
https://dl.dropboxusercontent.com/u/19882028/VLF/dk7fc_VLF_150718_1326.jpg
73, Stefan
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