The 20:30 message from IZ7SLZ: found rank 0: GE PAUL TNX RPRT ps [ 1 180 180 180 180] re-encode 296/1040 ber 2.85e-01 Es/N0=-7.9 Eb/N0=2.4 effrate=1/10.83 In this case, the initial reference phase wa
John Lennon - at 5.5 dB Eb/N0 I can almost hear him ;-) Nice one! 73, Markus --Ursprüngliche Mitteilung-- Von: IZ7SLZ <[email protected]> An: rsgb_lf_group <[email protected]> Vers
Hello Markus and all, thanks for decoding again. Yes, IMAGINE is an old but still actual song, specially in these days. If Paul and Andy have received it, maybe this is the longest QTC ever copyed on
I switched off after that decode. Still putting last touches to the software for decimating and recording. But it does appear to work at least ! Andy On 19 November 2015 at 23:06, IZ7SLZ <iz7slz.
Sorry I was unable to decode this one. Tried list 100k with time offsets -0.1 to +0.9 in 0.02 second steps. My receiving system is not very good. You guys are doing much better because you have prope
Contemplating building a receiver for LF. I probably have all the parts. First I have to clear the decks http://abelian.org/vlf/tmp/151119b.jpg to make a few square cm of bench area. So many half fin
Hi Paul, You seem to eat a lot of ice! :-) Interesting image :-) 73, Stefan Am 20.11.2015 21:00, schrieb Paul Nicholson: Contemplating building a receiver for LF. I probably have all the parts. First
I force the stuff down just for the useful boxes. Such is the effort one must make for this hobby. Spot the Trio 9R59D which I've had since I was a boy, still going and is used for listening to CW o
Hi Paul, looking at your spectrograms three weeks ago, your direct-sampling LF receiver actually seemed to be doing rather well! It's surely sensitive enough, and apparently not limited by ADC noise
I think so, the rx itself hasn't had any problems. The timing system has got better too with the incentive to reduce the jitter without sacrificing speed of response to clock drift. It seems that whe
Yes a 0.5 mHz (not Hz) hourly drift won't affect decoding much. I think the reason for chirp tolerance is simply that a quadratic phase associated with a linear frequency drift has smaller excursion
You're right. It's impractical to search for. The only way is to prefix the message with a spell of carrier long enough to measure F. But strictly speaking that carrier should be included in the over
