John, yes this is a valid point, as Joe is currently putting a very good signal into Europe. Domenico and I have been using the WSPR2/Op32 section near 137.5 kHz before, but that's probably not ideal
Yes a huge signal tonight in Europe from VO1NA. I'll leave it to you guys to choose a frequency. VO1NA 2015-12-04/05 4K19A 0.2S 131C QRO start Eb/N0 BER rank 22:00 7.2 5.7% 0 22:30 7.0 6.2% 0 23:00 4
Perhaps with a little help from enhanced propagation, the fast intercontinental messaging worked really well... 2015 Dec 4/5 131ch 4K19A 3280x0.2s start Eb/N0 UT dB 2200 0.1 2230 1.0 2300 5.5 2330 6.
How about a daytime test with, as a starting point, say Message: VO1NA Chars: 5 Symbols: 5 seconds Coding: 16K21A Duration: 5280 seconds, 01:28:00.00 -- Paul Nicholson --
John is right -- what a mess I've left on the EU grabbers! I'll set the Arduino for 137.37 for high speed EbNaut. Perhaps it's time for a rebuild of the exciter as the Arduino does not handle 32 bit
Looks like I chose about the right settings for daytime: found rank 10968: VO1NA ps [ 2 30 30 30 30] re-encode 425/1056 ber 4.02e-01 Es/N0=-15.1 Eb/N0=0.4 and the phase appears steady for the 90 minu
The best 13:30 decode was found rank 0: VO1NA ps [ 16 0 0 -30 -30] re-encode 396/1056 ber 3.75e-01 Es/N0=-12.9 Eb/N0=2.6 but when I plot the symbol amplitudes there's obviously a steady drift from a
The 15:00 message found rank 0: VO1NA ps [ 2 30 30 30 30] re-encode 389/1056 ber 3.68e-01 Es/N0=-12.4 Eb/N0=3.1 but I had to use a frequency offset. This time the signal was too weak to see the symbo
VO1NA 2015-12-05 16K21A 5S 5C QRO start Eb/N0 Freq offset 13:30 13.0 -222 uHz 15:00 3.1 -256 uHz 16:30 3.9 -482 uHz Frequency offset is from the peak of the carrier spectrum +/- 1 uHz averaged over t
There seems to be a jump after local noon. This could give some info on diurnal variability. I'll keep it going then. There is no trace of CHU on 3330 kHz yet. The K index is 4 so the ionosphere must
Maybe the battery here will hold up for another night. This signal could be detectable at long distance except that several dB will be lost unless the rx can correctly guess the frequency offset. Her
Very interesting, Paul -- propagation or oscillator could be causing the frequency changes. I'll have to reduce my drift a bit to answer that one! Rx off now for battery charge. Those 3.05 Hz sideban
It was a few hours before I got to the rx to retrieve the battery so it continued on an almost dead battery and recorded two more messages. VO1NA 2015-12-05/06 16K21A 5S 5C QRO start Eb/N0 Freq 13:30
